GB 50212-1991 Code for construction and acceptance of building anti-corrosion projects
Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50212—91
Specification for construction and acceptanceof anticorrosiveengineering of buildingsConstruction Standard
1991-11-15Release
1992-07-01Implementation
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Jointly Issued
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National Standard of the People's Republic of China
Specification for construction and acceptanceof anticorrosiveengineering of buildingsGB
50212—91
Editor Department: China Ministry of Chemical Industry of the People's Republic of China Approval department: Ministry of Construction of the People's Republic of China Effective date: July 1, 1992
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the release of the national standard "Construction and Acceptance Code for Building Anticorrosion Engineering"
Construction Standard [1991] No. 817
According to the requirements of the State Planning Commission's Document No. [1986] 2630, the "Construction and Acceptance Code for Building Anticorrosion Engineering" revised by the Ministry of Chemical Industry and relevant departments has been reviewed by relevant departments. The "Construction and Acceptance Code for Building Anticorrosion Engineering" GB50212-91 is now approved as a national standard and will be implemented from July 1, 1992. The original national standard "Construction and Acceptance Code for Building Anticorrosion Engineering" TJ212-76 is abolished at the same time. This standard is managed by the Ministry of Chemical Industry of China. The specific interpretation and other work is the responsibility of the Construction Technology Research Institute of the Ministry of Chemical Industry. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
November 15, 1991
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Revision Notes
This specification is edited by our ministry in accordance with the requirements of the State Planning Commission's Document No. 2630 (1986). Specifically, the Construction Technology Research Institute of the Ministry of Chemical Industry, together with the Ministry of Metallurgical Industry, the Ministry of Aerospace Industry, China Petrochemical Corporation and relevant units under the Ministry of Chemical Industry, comprehensively revised the original "Construction and Acceptance Specifications for Building Anticorrosion Engineering" (TJ212-76).
During the revision process, the compilation team conducted extensive investigations and studies, carefully summarized the experience of my country's building anticorrosion engineering construction, engineering application and scientific research in the past 10 years, and widely solicited opinions from relevant units across the country for many times. After repeated revisions, our ministry and relevant departments reviewed and finalized the draft. This specification includes twelve chapters and four appendices, of which Chapters 1, 2, 11 and 12 are general parts, and the remaining chapters are special requirements for various anti-corrosion projects classified by materials. Chapters 8 and 11 are newly added in this revision. With the continuous development of the construction industry, new technologies and new processes will continue to emerge. It is hoped that all units will carefully summarize their experience and pay attention to accumulating information in the process of implementing this specification. If you find that there is a need for modification and supplementation, please send your opinions and relevant information to the Construction Technology Research Institute of the Ministry of Chemical Industry (Address: Huaizhong Middle Road, Shijiazhuang City, Hebei Province, Postal Code: 050021) for reference in future revisions. Ministry of Chemical Industry
June 1990
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Chapter 1
Chapter 2
Section 1
Section 2
Section 3
Chapter 3
Section 1
Section 2
Chapter 4
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter 5
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 6
Section 1
Section 2
Section 3
Section 4
Section 5
Base treatment and requirements
Cement mortar or concrete
Steel structure base
Wooden base
Block material anti-corrosion engineering
Quality requirements for raw materials and finished products
Construction and inspection of block materials
Asphalt anti-corrosion engineering
General provisions
Quality requirements for raw materials and finished products
Preparation of asphalt mastic, asphalt mortar and asphalt concreteConstruction of isolation layer
Asphalt mastic paving blocks
Construction of asphalt mortar and asphalt concrete
Crushed stone asphalt filling
Water glass anti-corrosion engineering
General provisions
Quality requirements for raw materials and finished products
Water glass mastic Preparation of water glass cement, water glass mortar and water glass concrete Water glass mortar paving blocks Construction of water glass concrete Sulfur anti-corrosion engineering General provisions Quality requirements for raw materials and finished products Preparation of sulfur cement and sulfur mortar Casting of sulfur cement and sulfur mortar blocks Sulfur Construction of sulfonic concrete
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Engineering Construction Standard Full Text Information System
Chapter VII
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter VIII
Section Section 1
Section 2
Section 3
Section 4
Chapter 9
Section 1
Section 2
Section 3
Chapter 10
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Chapter 11
Chapter 12
Appendix 3
Appendix 4
Additional Notes
General Provisions for Resin Anti-corrosion Engineering
Professional Electrical Industry General Information
Quality Requirements for Raw Materials and Finished Products
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Preparation of Resin Materials
Construction of Resin Glass Fiber Reinforced Plastics..
* (26)
050000
240095
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Construction of resin cement, resin mortar paving blocks and resin cement grouting and grouting
Construction of resin thin cement, resin mortar integral surface layerMaintenance and quality inspection of resin anti-corrosion projectsChloroprene latex cement mortar anti-corrosion projects
General provisions
Quality requirements for raw materials and finished products
Mortar preparation
Construction and maintenance||tt ||Coating anti-corrosion engineering
General provisions
Preparation and construction of coatings
Quality inspection
Acid-resistant ceramic pipe engineering
General provisions
Asphalt mastic interface
Sulfur mortar interface
Epoxy resin mastic interface
Water glass mastic interface
Leak detection and backfilling
Safety technical requirements
Engineering acceptance
Construction mix ratio
Quality requirements for anti-corrosion coatings.
Test methods for raw materials and finished products
Explanation of terms used in this specification
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Engineering Construction Standard Full Text Information System
Chapter 1 General
Article 1.0.1 This specification is formulated to ensure the construction quality of anti-corrosion projects for buildings and structures and to reduce the losses caused by corrosion. Article 1.0.2 This specification applies to the construction and acceptance of anti-corrosion projects for newly built, rebuilt and expanded buildings and structures. Article 1.0.3 The raw materials used in anti-corrosion projects must comply with the provisions of this specification and have a factory certificate or inspection data. When there is doubt about the quality of the raw materials, re-inspection should be carried out.
Article 1·0·4
For anti-corrosion materials with requirements for construction mix ratio, their mix ratio shall be determined through tests and shall not be changed arbitrarily. Article 1·0·5 In addition to complying with the provisions of this specification, the construction of anti-corrosion projects shall also comply with the provisions of relevant national standards in force. Engineering Construction Standards Full-text Information System
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Chapter 2 Base Treatment and Requirements
Section 1 Cement Mortar or Concrete Base
Article 2·1·1 The cement mortar or concrete base must be firm, dense and flat. The slope and strength of the base shall meet the design requirements. There should be no sanding, peeling, cracks, honeycomb and other phenomena. The flatness should be checked with a 2m ruler, and the allowable gap should not be greater than 5mm.
Article 2·1·2 When paving blocks on the surface of cement mortar or concrete base, the inner and outer corners of the base should be made into right angles. When other types of anti-corrosion construction are carried out, the inner and outer corners of the base should be made into bevels or rounded corners. Article 2·1·3 The base must be dry. In a layer with a thickness of 20mm, the moisture content should not be greater than 6%. When the design has special requirements for humidity, construction should be carried out according to the design requirements.
Note: When using moisture-curing epoxy resin curing agent for construction, the moisture content of the base may not be restricted by this restriction, but there should be no floating water on the surface of the base.
Article 2·1·4 The surface of the base must be clean. Before anti-corrosion construction, the floating dust, cement residue and loose parts on the surface of the base should be cleaned. The surface treatment method of the base should be to grind the surface with a grinding wheel or wire brush, and then clean it with a clean soft brush, compressed air or vacuum cleaner. When conditions permit, light sandblasting can be used to form a uniform rough surface on the base.
Article 2·1·5 Surfaces contaminated by grease and chemicals or loose bases that have been corroded during reconstruction and expansion projects should be pre-treated, and the treatment methods should comply with the following provisions:
, Surfaces contaminated by grease and chemicals can be washed with solvents, detergents, alkali solutions or treated with methods such as fire baking and steam blowing, but the base should not be damaged; Engineering 2 Construction Standard Full Text Information System
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, Loose bases corroded by corrosive media must be chiseled clean and filled with fine stone concrete, etc., and treated as new bases after maintenance. Article 2·1·6 All pipes, casings, reserved holes, and embedded parts that pass through the anti-corrosion layer should be pre-buried or reserved.
Section 2 Steel Structure Base
Article 2·2·1 The surface of the steel structure should be flat, and welding slag, burrs, rust, oil stains, etc. should be cleaned before construction.
Article 2·2·2 The level of surface treatment of steel structures shall be divided into two levels and shall comply with the following provisions:
1. The surface of the first-level steel structure shall be free of visible grease, dirt, oxide scale, rust, paint coating and other attachments, and any remaining traces shall only be slight spots or stripes. 2. The surface of the second-level steel structure shall be free of visible grease and dirt, and there shall be no loosely attached oxide scale, rust, paint coating and other attachments. Article 2·2·3 The surface treatment methods of steel structures may be dry sandblasting, pickling, mechanical rust removal or manual rust removal. Article 2·2·4 For seriously polluted steel structures and seriously corroded steel structures in reconstruction and expansion projects, surface pretreatment shall be carried out, and the treatment methods shall comply with the following provisions: 1. The surface of steel structures contaminated by grease may be degreased by organic solvents, hot alkali solution or emulsifiers and baking; 2. The surface of steel structures contaminated by oxides or attached with old paint layers may be cleaned by baking, scraping and other methods.
Article 2·2·5 The treated steel structure base should be painted with primer in time, and the interval time should not exceed 8h.
Section 3 Wood Base
Article 2·3·1 The surface of the wood base should be flat, smooth, free of grease and resin, and the floating dust on the surface should be cleaned.
Article 2·3·2 The wood base should be dry, and the moisture content should not be greater than 15%. Engineering Construction Standard Full Text Information System
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Article 23.3
When the surface of the base is contaminated by grease, it can be polished with sandpaper first, and then cleaned with solvents such as gasoline.
When there are knots and resins on the wood base, it should be sealed with resin varnish. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Chapter 3 Anti-corrosion Engineering of Block Materials
Section 1 Quality Requirements for Raw Materials and Finished Products Article 3·1·1 The varieties, specifications and grades of block materials shall comply with the design requirements. When there are no design requirements, they shall comply with the following provisions: 1. The acid resistance and water absorption rate of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates and cast stone plates shall comply with the provisions of Table 3·1·1, and their thermal stability shall comply with the qualified provisions in Appendix III of this code.
Quality table of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates and cast stone plates 3·1·1
Acid-resistant bricks
Acid-resistant ceramic plates
Cast stone plates
Acid resistance (%)
Water absorption (%)
2. Granite and other stone blocks should have uniform structure, without cracks or acid-intolerant interlayers. Their acid resistance should not be less than 95%, and their acid immersion stability should be qualified: water absorption should not be greater than 1%; compressive strength should not be less than 100MPa. 3. The compressive strength of polymer-impregnated concrete blocks should not be less than 70MPa; water absorption should not be greater than 1%; impermeability should be greater than 4MPa; and the surface immersion depth should not be less than 20mm. The impregnation liquid should preferably be styrene epoxy resin liquid or styrene unsaturated polyester resin liquid with a mix ratio of 9:1.
Fourth, asphalt impregnated bricks, the impregnated bricks should be No. 75 clay bricks. When the use temperature is less than 30℃, the impregnated asphalt grade should be No. 60, and when the use temperature is 3040℃, it should be No. 30. The impregnation depth should not be less than 15mm. Engineering Construction Standard Full Text Information System
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Article 3·1·2 The quality requirements and preparation of mastic and mortar, and the requirements for paving blocks shall comply with the provisions of the relevant chapters of this specification. Section 2 Construction and Inspection of Blocks
Article 3·2·1 Blocks should be selected before use, and should be washed and dried for standby use.
Article 3·2·2 Before paving blocks, it is advisable to try out the arrangement first; when paving, the paving order should be from low to high, first pits, trenches, then ground, skirting boards or wall skirts. At the inner corners, the vertical blocks should press the flat blocks, and at the outer corners, the flat blocks should cover the vertical blocks. There should be no cross joints in the paving of blocks, and there should be no overlapping joints in multiple layers of blocks. Article 3.2.3 The bonding layer and mortar joints of the blocks should be full and dense, firmly bonded, and should not be loose, cracked or bulging. The surface of the mortar joints should be flat, and the size of the mortar joints should comply with the provisions of the relevant chapters of this specification.
Article 3·2·4 For block surface layers that require grouting, excess glue or mortar in the joints should be scraped off at any time during paving: Before grouting, the mortar joints should be cleaned. Article 3·2·5 The flatness and slope of the block surface layer should meet the following requirements: 1. The surface layer of the ground should be flat and should be checked with a 2m ruler. The allowable gap should not be greater than the following values:
Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels, cast stone panels Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks Layer
Surface layer of asphalt impregnated bricks
2. Block surface layer The height difference between adjacent blocks should not be greater than the following values: Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates, cast stone plates Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks
Surface layer of asphalt impregnated bricks
3. The slope should meet the design requirements, and its allowable deviation should be ±0.2% of the slope length, and the maximum deviation value should not be greater than 30mm; when doing a water splashing test, the water should be able to drain smoothly. Engineering 6 Construction Standard Full Text Information System2%, the maximum deviation shall not be greater than 30mm; when doing water splashing test, water should be able to drain smoothly.2%, the maximum deviation shall not be greater than 30mm; when doing water splashing test, water should be able to drain smoothly.2%, the maximum deviation shall not be greater than 30mm; when doing water splashing test, water should be able to drain smoothly.2%, the maximum deviation shall not be greater than 30mm; when doing water splashing test, water should be able to drain smoothly.2%, the maximum deviation shall not be greater than 30mm; when doing water splashing test, water should be able to drain smoothly.2%, the maximum deviation shall not be greater than 30mm; when doing water splashing test, water should be able to drain smoothly.coI Engineering Construction Standard Full Text Information System
, Loose bases eroded by corrosive media must be chiseled clean and filled with fine stone concrete, etc., and treated as new bases after maintenance. Article 2·1·6 All pipes, casings, reserved holes, and embedded parts that pass through the anti-corrosion layer should be pre-buried or reserved.
Section 2 Steel Structure Base
Article 2·2·1 The surface of the steel structure should be flat, and welding slag, burrs, rust, oil stains, etc. should be cleaned before construction.
Article 2·2·2 The level of surface treatment of steel structures should be divided into two levels and should meet the following requirements:
1. There is no visible grease, dirt, oxide scale, rust, paint coating and other attachments on the surface of the first-level steel structure, and any remaining traces can only be slight spots in the form of dots or stripes. 2. There is no visible grease and dirt on the surface of the second-level steel structure, and there are no oxide scale, rust, paint coating and other attachments that are not firmly attached. Article 2·2·3 The surface treatment methods of steel structures can be dry sandblasting, pickling, mechanical rust removal or manual rust removal. Article 2·2·4 For seriously polluted steel structures and seriously corroded steel structures in reconstruction and expansion projects, surface pretreatment should be carried out, and the treatment methods should comply with the following provisions: 1. For steel structure surfaces contaminated by grease, organic solvents, hot alkali solution or emulsifiers and baking methods can be used to remove grease; 2. For steel structure surfaces contaminated by oxides or with old paint layers, baking, scraping and other methods can be used to clean them.
Article 2·2·5 The treated steel structure base should be painted with primer in time, and the interval time should not exceed 8h.
Section 3 Wooden Base
Article 2·3·1 The surface of the wooden base should be flat, smooth, free of grease and resin, and the floating dust on the surface should be cleaned.
Article 2·3·2 The wooden base should be dry, and the moisture content should not be greater than 15%. Engineering Construction Standard Full Text Information System
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Article 23.3
When the surface of the base is contaminated by grease, it can be polished with sandpaper first, and then cleaned with solvents such as gasoline.
When there are knots and resins on the wooden base, it should be sealed with resin, glue, varnish, etc. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 Anti-corrosion Engineering of Block Materials
Section 1 Quality Requirements for Raw Materials and Finished Products Article 3·1·1 The variety, specification and grade of block materials shall meet the design requirements. When there are no design requirements, they shall meet the following provisions: 1. The acid resistance and water absorption rate of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels and cast stone panels shall meet the requirements of Table 3·1·1, and their thermal stability shall meet the qualified requirements in Appendix 3 of this specification.
Quality table of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates and cast stone plates 3·1·1
Acid-resistant bricks
Acid-resistant ceramic plates
Cast stone plates
Acid resistance (%)
Water absorption (%)
2. Granite and other stone blocks should have uniform structure, without cracks or acid-intolerant interlayers. Their acid resistance should not be less than 95%, and their acid immersion stability should be qualified: water absorption should not be greater than 1%; compressive strength should not be less than 100MPa. 3. The compressive strength of polymer-impregnated concrete blocks should not be less than 70MPa; water absorption should not be greater than 1%; impermeability should be greater than 4MPa; and the surface immersion depth should not be less than 20mm. The impregnation liquid should preferably be styrene epoxy resin liquid or styrene unsaturated polyester resin liquid with a mix ratio of 9:1.
Fourth, asphalt impregnated bricks, the impregnated bricks should be No. 75 clay bricks. When the use temperature is less than 30℃, the impregnated asphalt grade should be No. 60, and when the use temperature is 3040℃, it should be No. 30. The impregnation depth should not be less than 15mm. Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
Article 3·1·2 The quality requirements and preparation of mastic and mortar, and the requirements for paving blocks shall comply with the provisions of the relevant chapters of this specification. Section 2 Construction and Inspection of Blocks
Article 3·2·1 Blocks should be selected before use, and should be washed and dried for standby use.
Article 3·2·2 Before paving blocks, it is advisable to try out the arrangement first; when paving, the paving order should be from low to high, first pits, trenches, then ground, skirting boards or wall skirts. At the inner corners, the vertical blocks should press the flat blocks, and at the outer corners, the flat blocks should cover the vertical blocks. There should be no cross joints in the paving of blocks, and there should be no overlapping joints in multiple layers of blocks. Article 3.2.3 The bonding layer and mortar joints of the blocks should be full and dense, firmly bonded, and should not be loose, cracked or bulging. The surface of the mortar joints should be flat, and the size of the mortar joints should comply with the provisions of the relevant chapters of this specification.
Article 3·2·4 For block surface layers that require grouting, excess glue or mortar in the joints should be scraped off at any time during paving: Before grouting, the mortar joints should be cleaned. Article 3·2·5 The flatness and slope of the block surface layer should meet the following requirements: 1. The surface layer of the ground should be flat and should be checked with a 2m ruler. The allowable gap should not be greater than the following values:
Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels, cast stone panels Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks Layer
Surface layer of asphalt impregnated bricks
2. Block surface layer The height difference between adjacent blocks should not be greater than the following values: Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates, cast stone plates Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks
Surface layer of asphalt impregnated bricks
3. The slope should meet the design requirements, and its allowable deviation should be ±0.2% of the slope length, and the maximum deviation value should not be greater than 30mm; when doing a water splashing test, the water should be able to drain smoothly. Engineering 6 Construction Standard Full Text Information SystemcoI Engineering Construction Standard Full Text Information System
, Loose bases eroded by corrosive media must be chiseled clean and filled with fine stone concrete, etc., and treated as new bases after maintenance. Article 2·1·6 All pipes, casings, reserved holes, and embedded parts that pass through the anti-corrosion layer should be pre-buried or reserved.
Section 2 Steel Structure Base
Article 2·2·1 The surface of the steel structure should be flat, and welding slag, burrs, rust, oil stains, etc. should be cleaned before construction.
Article 2·2·2 The level of surface treatment of steel structures should be divided into two levels and should meet the following requirements:
1. There is no visible grease, dirt, oxide scale, rust, paint coating and other attachments on the surface of the first-level steel structure, and any remaining traces can only be slight spots in the form of dots or stripes. 2. There is no visible grease and dirt on the surface of the second-level steel structure, and there are no oxide scale, rust, paint coating and other attachments that are not firmly attached. Article 2·2·3 The surface treatment methods of steel structures can be dry sandblasting, pickling, mechanical rust removal or manual rust removal. Article 2·2·4 For seriously polluted steel structures and seriously corroded steel structures in reconstruction and expansion projects, surface pretreatment should be carried out, and the treatment methods should comply with the following provisions: 1. For steel structure surfaces contaminated by grease, organic solvents, hot alkali solution or emulsifiers and baking methods can be used to remove grease; 2. For steel structure surfaces contaminated by oxides or with old paint layers, baking, scraping and other methods can be used to clean them.
Article 2·2·5 The treated steel structure base should be painted with primer in time, and the interval time should not exceed 8h.
Section 3 Wooden Base
Article 2·3·1 The surface of the wooden base should be flat, smooth, free of grease and resin, and the floating dust on the surface should be cleaned.
Article 2·3·2 The wooden base should be dry, and the moisture content should not be greater than 15%. Engineering Construction Standard Full Text Information System
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Article 23.3
When the surface of the base is contaminated by grease, it can be polished with sandpaper first, and then cleaned with solvents such as gasoline.
When there are knots and resins on the wooden base, it should be sealed with resin, glue, varnish, etc. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 Anti-corrosion Engineering of Block Materials
Section 1 Quality Requirements for Raw Materials and Finished Products Article 3·1·1 The variety, specification and grade of block materials shall meet the design requirements. When there are no design requirements, they shall meet the following provisions: 1. The acid resistance and water absorption rate of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels and cast stone panels shall meet the requirements of Table 3·1·1, and their thermal stability shall meet the qualified requirements in Appendix 3 of this specification.
Quality table of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates and cast stone plates 3·1·1
Acid-resistant bricks
Acid-resistant ceramic plates
Cast stone plates
Acid resistance (%)
Water absorption (%)
2. Granite and other stone blocks should have uniform structure, without cracks or acid-intolerant interlayers. Their acid resistance should not be less than 95%, and their acid immersion stability should be qualified: water absorption should not be greater than 1%; compressive strength should not be less than 100MPa. 3. The compressive strength of polymer-impregnated concrete blocks should not be less than 70MPa; water absorption should not be greater than 1%; impermeability should be greater than 4MPa; and the surface immersion depth should not be less than 20mm. The impregnation liquid should preferably be styrene epoxy resin liquid or styrene unsaturated polyester resin liquid with a mix ratio of 9:1.
Fourth, asphalt impregnated bricks, the impregnated bricks should be No. 75 clay bricks. When the use temperature is less than 30℃, the impregnated asphalt grade should be No. 60, and when the use temperature is 3040℃, it should be No. 30. The impregnation depth should not be less than 15mm. Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
Article 3·1·2 The quality requirements and preparation of mastic and mortar, and the requirements for paving blocks shall comply with the provisions of the relevant chapters of this specification. Section 2 Construction and Inspection of Blocks
Article 3·2·1 Blocks should be selected before use, and should be washed and dried for standby use.
Article 3·2·2 Before paving blocks, it is advisable to try out the arrangement first; when paving, the paving order should be from low to high, first pits, trenches, then ground, skirting boards or wall skirts. At the inner corners, the vertical blocks should press the flat blocks, and at the outer corners, the flat blocks should cover the vertical blocks. There should be no cross joints in the paving of blocks, and there should be no overlapping joints in multiple layers of blocks. Article 3.2.3 The bonding layer and mortar joints of the blocks should be full and dense, firmly bonded, and should not be loose, cracked or bulging. The surface of the mortar joints should be flat, and the size of the mortar joints should comply with the provisions of the relevant chapters of this specification.
Article 3·2·4 For block surface layers that require grouting, excess glue or mortar in the joints should be scraped off at any time during paving: Before grouting, the mortar joints should be cleaned. Article 3·2·5 The flatness and slope of the block surface layer should meet the following requirements: 1. The surface layer of the ground should be flat and should be checked with a 2m ruler. The allowable gap should not be greater than the following values:
Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels, cast stone panels Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks Layer
Surface layer of asphalt impregnated bricks
2. Block surface layer The height difference between adjacent blocks should not be greater than the following values: Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates, cast stone plates Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks
Surface layer of asphalt impregnated bricks
3. The slope should meet the design requirements, and its allowable deviation should be ±0.2% of the slope length, and the maximum deviation value should not be greater than 30mm; when doing a water splashing test, the water should be able to drain smoothly. Engineering 6 Construction Standard Full Text Information SystemArticle 3
When the surface of the base is contaminated by grease, it can be polished with sandpaper first, and then cleaned with solvents such as gasoline.
When the wooden base has knots and resin, it should be sealed with resin, glue, varnish, etc. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 Anti-corrosion Engineering of Block Materials
Section 1 Quality Requirements for Raw Materials and Finished Products Article 3·1·1 The variety, specification and grade of block materials shall meet the design requirements. When there are no design requirements, they shall meet the following provisions: 1. The acid resistance and water absorption rate of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels and cast stone panels shall meet the requirements of Table 3·1·1, and their thermal stability shall meet the qualified requirements in Appendix 3 of this specification.
Quality table of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates and cast stone plates 3·1·1
Acid-resistant bricks
Acid-resistant ceramic plates
Cast stone plates
Acid resistance (%)
Water absorption (%)
2. Granite and other stone blocks should have uniform structure, without cracks or acid-intolerant interlayers. Their acid resistance should not be less than 95%, and their acid immersion stability should be qualified: water absorption should not be greater than 1%; compressive strength should not be less than 100MPa. 3. The compressive strength of polymer-impregnated concrete blocks should not be less than 70MPa; water absorption should not be greater than 1%; impermeability should be greater than 4MPa; and the surface immersion depth should not be less than 20mm. The impregnation liquid should preferably be styrene epoxy resin liquid or styrene unsaturated polyester resin liquid with a mix ratio of 9:1.
Fourth, asphalt impregnated bricks, the impregnated bricks should be No. 75 clay bricks. When the use temperature is less than 30℃, the impregnated asphalt grade should be No. 60, and when the use temperature is 3040℃, it should be No. 30. The impregnation depth should not be less than 15mm. Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
Article 3·1·2 The quality requirements and preparation of mastic and mortar, and the requirements for paving blocks shall comply with the provisions of the relevant chapters of this specification. Section 2 Construction and Inspection of Blocks
Article 3·2·1 Blocks should be selected before use, and should be washed and dried for standby use.
Article 3·2·2 Before paving blocks, it is advisable to try out the arrangement first; when paving, the paving order should be from low to high, first pits, trenches, then ground, skirting boards or wall skirts. At the inner corners, the vertical blocks should press the flat blocks, and at the outer corners, the flat blocks should cover the vertical blocks. There should be no cross joints in the paving of blocks, and there should be no overlapping joints in multiple layers of blocks. Article 3.2.3 The bonding layer and mortar joints of the blocks should be full and dense, firmly bonded, and should not be loose, cracked or bulging. The surface of the mortar joints should be flat, and the size of the mortar joints should comply with the provisions of the relevant chapters of this specification.
Article 3·2·4 For block surface layers that require grouting, excess glue or mortar in the joints should be scraped off at any time during paving: Before grouting, the mortar joints should be cleaned. Article 3·2·5 The flatness and slope of the block surface layer should meet the following requirements: 1. The surface layer of the ground should be flat and should be checked with a 2m ruler. The allowable gap should not be greater than the following values:
Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels, cast stone panels Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks Layer
Surface layer of asphalt impregnated bricks
2. Block surface layer The height difference between adjacent blocks should not be greater than the following values: Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates, cast stone plates Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks
Surface layer of asphalt impregnated bricks
3. The slope should meet the design requirements, and its allowable deviation should be ±0.2% of the slope length, and the maximum deviation value should not be greater than 30mm; when doing a water splashing test, the water should be able to drain smoothly. Engineering 6 Construction Standard Full Text Information SystemArticle 3
When the surface of the base is contaminated by grease, it can be polished with sandpaper first, and then cleaned with solvents such as gasoline.
When the wooden base has knots and resin, it should be sealed with resin, glue, varnish, etc. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 Anti-corrosion Engineering of Block MaterialsbZxz.net
Section 1 Quality Requirements for Raw Materials and Finished Products Article 3·1·1 The variety, specification and grade of block materials shall meet the design requirements. When there are no design requirements, they shall meet the following provisions: 1. The acid resistance and water absorption rate of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels and cast stone panels shall meet the requirements of Table 3·1·1, and their thermal stability shall meet the qualified requirements in Appendix 3 of this specification.
Quality table of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates and cast stone plates 3·1·1
Acid-resistant bricks
Acid-resistant ceramic plates
Cast stone plates
Acid resistance (%)
Water absorption (%)
2. Granite and other stone blocks should have uniform structure, without cracks or acid-intolerant interlayers. Their acid resistance should not be less than 95%, and their acid immersion stability should be qualified: water absorption should not be greater than 1%; compressive strength should not be less than 100MPa. 3. The compressive strength of polymer-impregnated concrete blocks should not be less than 70MPa; water absorption should not be greater than 1%; impermeability should be greater than 4MPa; and the surface immersion depth should not be less than 20mm. The impregnation liquid should preferably be styrene epoxy resin liquid or styrene unsaturated polyester resin liquid with a mix ratio of 9:1.
Fourth, asphalt impregnated bricks, the impregnated bricks should be No. 75 clay bricks. When the use temperature is less than 30℃, the impregnated asphalt grade should be No. 60, and when the use temperature is 3040℃, it should be No. 30. The impregnation depth should not be less than 15mm. Engineering Construction Standard Full Text Information System
W5
Engineering Construction Standard Full Text Information System
Article 3·1·2 The quality requirements and preparation of mastic and mortar, and the requirements for paving blocks shall comply with the provisions of the relevant chapters of this specification. Section 2 Construction and Inspection of Blocks
Article 3·2·1 Blocks should be selected before use, and should be washed and dried for standby use.
Article 3·2·2 Before paving blocks, it is advisable to try out the arrangement first; when paving, the paving order should be from low to high, first pits, trenches, then ground, skirting boards or wall skirts. At the inner corners, the vertical blocks should press the flat blocks, and at the outer corners, the flat blocks should cover the vertical blocks. There should be no cross joints in the paving of blocks, and there should be no overlapping joints in multiple layers of blocks. Article 3.2.3 The bonding layer and mortar joints of the blocks should be full and dense, firmly bonded, and should not be loose, cracked or bulging. The surface of the mortar joints should be flat, and the size of the mortar joints should comply with the provisions of the relevant chapters of this specification.
Article 3·2·4 For block surface layers that require grouting, excess glue or mortar in the joints should be scraped off at any time during paving: Before grouting, the mortar joints should be cleaned. Article 3·2·5 The flatness and slope of the block surface layer should meet the following requirements: 1. The surface layer of the ground should be flat and should be checked with a 2m ruler. The allowable gap should not be greater than the following values:
Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic panels, cast stone panels Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks Layer
Surface layer of asphalt impregnated bricks
2. Block surface layer The height difference between adjacent blocks should not be greater than the following values: Surface layer of acid-resistant bricks, cylinder bricks, acid-resistant ceramic plates, cast stone plates Surface layer of granite and other strip stone blocks
Surface layer of polymer-impregnated concrete blocks
Surface layer of asphalt impregnated bricks
3. The slope should meet the design requirements, and its allowable deviation should be ±0.2% of the slope length, and the maximum deviation value should not be greater than 30mm; when doing a water splashing test, the water should be able to drain smoothly. Engineering 6 Construction Standard Full Text Information System
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