GB 50224-1995 Standard for inspection and assessment of building anti-corrosion engineering quality
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
50224-95
Standand for inspection and evaluation ofanticorrosiveengineering quality of buildingsConstruction Standard
1995-08-23Release
1996-03-01Implementation
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Jointly Released
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Building Anticorrosive Engineering Quality
Inspection and Evaluation Standard
Standand for inspection and evaluation ofanticorrosiveengineering quality of BuildingsGB50224—95
Editor: Ministry of Chemical Industry of the People's Republic of ChinaApproval: Ministry of Construction of the People's Republic of ChinaEffective Date: March 1, 1996
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the Release of the National Standard "Standard for Inspection and Assessment of Building Anticorrosion Engineering Quality"
Construction Standard [1995] No. 483
According to the requirements of the State Planning Commission's Document No. 30 of 1989, the "Standard for Inspection and Assessment of Building Anticorrosion Engineering Quality" jointly formulated by the Ministry of Chemical Industry and relevant departments has been reviewed by relevant departments. The "Standard for Inspection and Assessment of Building Anticorrosion Engineering Quality" GB50224—95 is now approved as a mandatory national standard and will be implemented from March 1996.
This standard is managed by the Ministry of Chemical Industry, and the specific interpretation and other work is the responsibility of the Construction Technology Research Institute of the Ministry of Chemical Industry, and 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
August 23, 1995
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
2 Engineering Division,
Grades, Procedures and Organizations for Quality Inspection and Assessment
Engineering Division.
Grades·
Procedures and Organizations
3 Base Treatment Engineering
General Provisions·
Cement Mortar or Concrete Base
Steel Structure Base
Wooden Base·
Block Anti-corrosion Engineering
Asphalt Anti-corrosion Engineering
General Provisions
5.2 Asphalt Green thin clay isolation layer engineering
++o0o+++++0+0o+0++0+0oooo0o0+o.3 Block surface layer paved with asphalt clay
5.4 Anti-corrosion integral surface layer or cushion layer paved with asphalt mortar and asphalt concrete... (12)5.5
Asphalt cushion layer filled with crushed stone
6 Water glass anti-corrosion engineering
General provisions
6.2 Block surface layer paved with water glass clay and water glass mortar6.3 Water glass concrete
7 Sulfur anti-corrosion engineering
General provisions
7.2 Block surface layer poured with sulfur clay and sulfur mortar Engineering construction standard full text information system
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Engineering Construction Standard Full Text Information System
7.3 Sulfur concrete engineering
8 Resin anti-corrosion engineering…
General provisions
Glass fiber reinforced plastic anti-corrosion engineering
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Resin glue paving block, grouting and grouting anti-corrosion engineering Resin thin glue, resin mortar overall surface anti-corrosion engineering Neoprene latex cement mortar anti-corrosion engineering
Coating anti-corrosion engineering
Acid-resistant ceramic pipe engineering
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Evaluation of visual quality||t t||Sub-project quality inspection and evaluation form
Quality assurance data inspection form·
Sub-project quality comprehensive evaluation form
Inspection tools
Terms used in this standard
Additional instructions
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Engineering Construction Standard Full-text Information System
1 This standard is formulated to unify the methods and standards for inspection and evaluation of building anti-corrosion engineering quality, divide the engineering quality grades, promote enterprises to strengthen management, and ensure engineering quality.
This standard applies to the inspection and evaluation of the quality of anti-corrosion engineering of newly built, rebuilt, and expanded buildings and structures.
3 The main technical indicators and technical requirements of this standard are formulated in accordance with the provisions of the current national standard "Construction and Acceptance Code for Building Corrosion Protection Engineering" GB50212-91 (hereinafter referred to as the "Construction Code").
1.0.4 The quality of raw materials, semi-finished products and finished products used in the building corrosion protection engineering inspected and evaluated by this standard shall comply with the relevant provisions of the "Construction Code" or the current national standards.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2 Engineering Division,
Grade, Procedure and Organization of Quality Inspection and Evaluation
2.1 Engineering Division
The inspection and evaluation of the quality of building corrosion protection engineering shall be carried out in sequence according to sub-projects and sub-projects.
2.1.2 The division of sub-projects and sub-projects shall comply with the following provisions: 2.1.2.1 Sub-projects shall be divided according to the types of main anti-corrosion materials, and the base treatment project can constitute a sub-project alone. The sub-projects of building anti-corrosion projects can be divided into: base treatment projects, block material anti-corrosion projects, asphalt anti-corrosion projects, water glass anti-corrosion projects, sulfur anti-corrosion projects, resin anti-corrosion projects, chloroprene latex cement mortar anti-corrosion projects, coating anti-corrosion projects, acid-resistant ceramic pipe projects, etc. 2.1.2.2 Sub-projects shall be divided according to buildings or structures that can independently constitute unit projects, and all anti-corrosion projects shall be regarded as a sub-project. 2.2 Grades
2.2.1 This standard divides the quality of sub-projects and sub-projects into two grades: "qualified" and "excellent".
2.1.2 The quality grade of sub-projects shall comply with the following provisions: 2.2.2.1 Qualified:
(1) Guaranteed items shall comply with the provisions of relevant quality inspection and evaluation standards; (2) The number and location of random inspections of basic items shall comply with the qualified provisions of relevant quality inspection and evaluation standards;
(3) Among the random inspections of items with allowable deviations, 70% or more of the measured values shall be within the range of values specified in the specifications, and the measured values of other points shall not exceed the corresponding maximum deviation values specified in this standard.
2.2.2.2 Excellent:
(1) Guarantee items shall comply with the provisions of the corresponding quality inspection and assessment standards; (2) The number and location of the basic items sampled shall comply with the qualified provisions of the corresponding quality inspection and assessment standards, and 50% or more of the locations shall comply with the excellent provisions;
(3) Among the sampled items with allowable deviation, 90% or more of the measured values shall be within the range of values specified in the specification, and the measured values of other points shall not exceed the corresponding maximum deviation values specified in this standard.
Note: ① Guarantee items: Inspection items that guarantee the safety and use functions of the project and have a decisive impact on the quality of the project.
② Basic items: Inspection items that guarantee the safety and use functions of the project and have an important impact on the quality of the project.
③ Allowable deviation items: Inspection items that allow a small number of test points to exceed the tolerance within the proportion range specified in this standard during the test and can still meet the safety and use functions of the project. 3 The quality level of the sub-project shall comply with the following provisions: 2.2.3
2.2.3.1 Qualified:
(1) The inspection and evaluation quality of the included sub-projects shall all meet the requirements of the qualified grade;
(2) The items and standards for the visual quality evaluation shall comply with the provisions of Appendix A of this standard, and the visual quality evaluation score rate shall reach 70% or above;(3) The quality assurance documents shall be basically complete. Excellent:
(1) The quality of the included sub-projects shall all meet the requirements, of which 50% or above shall be excellent, and the main sub-projects shall be excellent;(2) The items and standards for the visual quality evaluation shall comply with the provisions of Appendix A of this standard, and the visual quality evaluation score rate shall reach 85% or above;(3) The quality assurance documents shall be complete.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.2.4When the quality of a sub-project does not meet the qualified requirements in the corresponding quality inspection and evaluation standards, it should be handled in a timely manner, and its quality level should be determined according to the following provisions:2.2.4.1The quality level of reworked and redone can be re-evaluated.2.2.4.2
If the design requirements can be met after repair, its quality can only be evaluated as qualified2.3 Procedures and Organization
The quality of a sub-project should be evaluated by the person in charge of the sub-project on the basis of the team's self-inspection, and verified by a full-time quality inspector. The unified format of the sub-project quality inspection and evaluation form should comply with the provisions of Appendix B of this standard.
2.3.2The quality of the sub-project shall be evaluated by the person in charge of the unit project and verified by a full-time quality inspector. The content and format of the quality assurance data inspection form should comply with the provisions of Appendix C of this standard. The format of the comprehensive evaluation table of the quality of the sub-project shall comply with the provisions of Appendix D of this standard.
The general contractor shall be fully responsible for the quality of the project. When the sub-project is subcontracted by several units, each subcontractor shall inspect and evaluate the quality level of the sub-project it undertakes in accordance with the provisions of this standard, and submit the evaluation results and materials to the general contractor.
2.3.4 The inspection tools used in the inspection method of this standard shall comply with the provisions of Appendix E of this standard.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
3 Base Treatment Project
3.1 General Provisions
3.1.1 This chapter applies to the quality inspection and evaluation of the base treatment project of cement mortar or concrete base, steel structure base and wooden base anti-corrosion project. 3.1.2 When anti-corrosion engineering is carried out on the base of concrete, steel and technical structures, the base shall comply with the provisions of the relevant current national standards and the provisions of the construction code for base treatment. After the base treatment is completed, the process handover procedures shall be handled.
3.1.3 The number of inspections for base treatment engineering shall comply with the following provisions: 3.1.3.1 Cement mortar or concrete base: When the base treatment area is less than 150m2, 3 locations shall be randomly inspected; when it is 150m2 or above, one more location shall be randomly inspected for every additional 50m2. When it is less than 50m2, it shall be calculated as 50m2, and each location shall not be less than 3 measurement points.
Steel structure base and wooden base: 10% of the number of components shall be randomly inspected, but not less than 3 items, and 3 points shall be randomly inspected for each component.
3.2 Cement mortar or concrete base
3.2.1 The quality inspection of the guarantee project shall comply with the following provisions: 3.2.1.1 The strength of the base shall comply with the design requirements and the provisions of the "Construction Specifications". Inspection method: Check the strength test report of cement mortar or concrete. 3.2.1.2 The moisture content of the base shall comply with the design requirements or the provisions of the "Construction Specifications".
Inspection method: Check the moisture content test report of the base. 3.2.2 The quality inspection of basic projects shall comply with the following provisions: 3.2.2.1 The quality of cement mortar base:
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Qualified: The cement mortar base and the cushion layer should be firmly combined, without obvious cracks, sanding and peeling, and the positive and negative corners should comply with the provisions of the "Construction Specifications". Excellent: The cement mortar base and cushion layer should be firmly combined, flat and dense, without sanding, peeling, cracks, rough surfaces, etc., and the internal and external corners should comply with the provisions of the "Construction Specifications".
Inspection method: Observation and percussion inspection. 3.2.2.2 Quality of concrete base:
Qualified: The concrete base should be dense and flat, without obvious honeycombs and rough surfaces. Excellent: The concrete base should be dense and flat, without honeycombs and rough surfaces. Inspection method: Observation and inspection.
3.2.3 The quality inspection of the allowable deviation items shall comply with the following provisions: 3.2.3.1 The allowable deviation of the surface flatness of cement mortar or concrete base, the value specified in the "Construction Specifications" shall not be greater than 5mm, and the maximum deviation value of this standard can be 6mm. Inspection method: Check with a 2m ruler and a wedge-shaped feeler gauge. 3.2.3.2
The slope of the cement mortar or concrete base surface shall comply with the provisions of the design documents, and the allowable deviation is ±0.2% of the slope length, but the maximum deviation value shall not exceed 30mm.
Inspection method: measurement inspection.
3.3 Steel structure base
1 The quality inspection of the guarantee project shall comply with the following provisions: The level of surface treatment of the steel structure shall comply with the provisions of the design requirements. Inspection method: Check the construction records.
3.3.2 The quality inspection of the basic project shall comply with the following provisions: 3.3.2.1 The quality of the surface of the first-level steel structure: Qualified: There is no visible grease, dirt, oxide scale, rust and paint coating on the surface.
Excellent: On the basis of qualified, any remaining traces can only be slight spots in the form of dots or stripes.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Inspection method: Observation inspection. Www.bzxZ.net
2Quality of the surface of secondary steel structure:
Qualified: There is no visible grease and dirt on the surface, and there are no loosely attached oxide scale, rust and paint coating. Excellent: On the basis of qualification, the tightly attached oxide scale, pitting rust pits or old paint and other spot-like residues shall not exceed 1/3 within an area of 10000mm. Inspection method: Observation and inspection.
3.4 Wood base
1 The quality inspection of the guarantee project shall comply with the following provisions: 3.4.1
The moisture content of wood and the base treatment shall comply with the design requirements and the provisions of the "Construction Code"; the moisture content shall not be greater than 15%.
Inspection method: Check the construction records and the wood moisture content test report. 3.4.2 The quality inspection of basic items shall comply with the following provisions: Appearance quality of wood base:
Qualified: The surface is basically flat, without oil, dust and other pollution; knots and resins are treated.
Excellent: The surface is flat, free of oil, dust and other pollution, knots and resins should be treated and the wood grain of the filling wood should be consistent with the original wood. Inspection method: Observation and inspection of construction records. Engineering Construction Standard Full Text Information System1 General Provisions
3.1.1 This chapter applies to the quality inspection and assessment of the base treatment works of cement mortar or concrete base, steel structure base and wooden base anti-corrosion works. 3.1.2 When anti-corrosion works are constructed on the base of concrete, steel structure and technical structure works, the base shall comply with the provisions of the relevant current national standards and the provisions of the "Construction Code" on base treatment. After the base treatment is completed, the process handover procedures shall be handled.
3.1.3 The number of inspections for base treatment works shall comply with the following provisions: 3.1.3.1 Cement mortar or concrete base: When the base treatment area is less than 150m2, 3 places shall be randomly inspected; when it is 150m2 or above, one more place shall be randomly inspected for every additional 50m2. When it is less than 50m2, it shall be calculated as 50m2, and each place shall not be less than 3 measuring points.
Steel structure base and wooden base: 10% of the number of components shall be randomly inspected, but not less than 3 pieces, and 3 points shall be randomly inspected for each component.
3.2 Cement mortar or concrete base
3.2.1 The quality inspection of the guarantee project shall comply with the following provisions: 3.2.1.1 The strength of the base shall comply with the design requirements and the provisions of the "Construction Specifications". Inspection method: Check the strength test report of cement mortar or concrete. 3.2.1.2 The moisture content of the base shall comply with the design requirements or the provisions of the "Construction Specifications".
Inspection method: Check the moisture content test report of the base. 3.2.2 The quality inspection of basic items shall comply with the following provisions: 3.2.2.1 The quality of cement mortar base:
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Qualified: The cement mortar base and the cushion layer shall be firmly combined, without obvious cracks, sanding and shelling, and the positive and negative corners shall comply with the provisions of the "Construction Specifications". Excellent: The cement mortar base and cushion layer should be firmly combined, flat and dense, without sanding, peeling, cracks, rough surfaces, etc., and the internal and external corners should comply with the provisions of the "Construction Specifications".
Inspection method: Observation and percussion inspection. 3.2.2.2 Quality of concrete base:
Qualified: The concrete base should be dense and flat, without obvious honeycombs and rough surfaces. Excellent: The concrete base should be dense and flat, without honeycombs and rough surfaces. Inspection method: Observation and inspection.
3.2.3 The quality inspection of the allowable deviation items shall comply with the following provisions: 3.2.3.1 The allowable deviation of the surface flatness of cement mortar or concrete base, the value specified in the "Construction Specifications" shall not be greater than 5mm, and the maximum deviation value of this standard can be 6mm. Inspection method: Check with a 2m ruler and a wedge-shaped feeler gauge. 3.2.3.2
The slope of the cement mortar or concrete base surface shall comply with the provisions of the design documents, and the allowable deviation is ±0.2% of the slope length, but the maximum deviation value shall not exceed 30mm.
Inspection method: measurement inspection.
3.3 Steel structure base
1 The quality inspection of the guarantee project shall comply with the following provisions: The level of surface treatment of the steel structure shall comply with the provisions of the design requirements. Inspection method: Check the construction records.
3.3.2 The quality inspection of the basic project shall comply with the following provisions: 3.3.2.1 The quality of the surface of the first-level steel structure: Qualified: There is no visible grease, dirt, oxide scale, rust and paint coating on the surface.
Excellent: On the basis of qualified, any remaining traces can only be slight spots in the form of dots or stripes.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Inspection method: Observation inspection.
2Quality of the surface of secondary steel structure:
Qualified: There is no visible grease and dirt on the surface, and there are no loosely attached oxide scale, rust and paint coating. Excellent: On the basis of qualification, the tightly attached oxide scale, pitting rust pits or old paint and other spot-like residues shall not exceed 1/3 within an area of 10000mm. Inspection method: Observation and inspection.
3.4 Wood base
1 The quality inspection of the guarantee project shall comply with the following provisions: 3.4.1
The moisture content of wood and the base treatment shall comply with the design requirements and the provisions of the "Construction Code"; the moisture content shall not be greater than 15%.
Inspection method: Check the construction records and the wood moisture content test report. 3.4.2 The quality inspection of basic items shall comply with the following provisions: Appearance quality of wood base:
Qualified: The surface is basically flat, without oil, dust and other pollution; knots and resins are treated.
Excellent: The surface is flat, free of oil, dust and other pollution, knots and resins should be treated and the wood grain of the filling wood should be consistent with the original wood. Inspection method: Observation and inspection of construction records. Engineering Construction Standard Full Text Information System1 General Provisions
3.1.1 This chapter applies to the quality inspection and assessment of the base treatment works of cement mortar or concrete base, steel structure base and wooden base anti-corrosion works. 3.1.2 When anti-corrosion works are constructed on the base of concrete, steel structure and technical structure works, the base shall comply with the provisions of the relevant current national standards and the provisions of the "Construction Code" on base treatment. After the base treatment is completed, the process handover procedures shall be handled.
3.1.3 The number of inspections for base treatment works shall comply with the following provisions: 3.1.3.1 Cement mortar or concrete base: When the base treatment area is less than 150m2, 3 places shall be randomly inspected; when it is 150m2 or above, one more place shall be randomly inspected for every additional 50m2. When it is less than 50m2, it shall be calculated as 50m2, and each place shall not be less than 3 measuring points.
Steel structure base and wooden base: 10% of the number of components shall be randomly inspected, but not less than 3 pieces, and 3 points shall be randomly inspected for each component.
3.2 Cement mortar or concrete base
3.2.1 The quality inspection of the guarantee project shall comply with the following provisions: 3.2.1.1 The strength of the base shall comply with the design requirements and the provisions of the "Construction Specifications". Inspection method: Check the strength test report of cement mortar or concrete. 3.2.1.2 The moisture content of the base shall comply with the design requirements or the provisions of the "Construction Specifications".
Inspection method: Check the moisture content test report of the base. 3.2.2 The quality inspection of basic items shall comply with the following provisions: 3.2.2.1 The quality of cement mortar base:
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Qualified: The cement mortar base and the cushion layer shall be firmly combined, without obvious cracks, sanding and shelling, and the positive and negative corners shall comply with the provisions of the "Construction Specifications". Excellent: The cement mortar base and cushion layer should be firmly combined, flat and dense, without sanding, peeling, cracks, rough surfaces, etc., and the internal and external corners should comply with the provisions of the "Construction Specifications".
Inspection method: Observation and percussion inspection. 3.2.2.2 Quality of concrete base:
Qualified: The concrete base should be dense and flat, without obvious honeycombs and rough surfaces. Excellent: The concrete base should be dense and flat, without honeycombs and rough surfaces. Inspection method: Observation and inspection.
3.2.3 The quality inspection of the allowable deviation items shall comply with the following provisions: 3.2.3.1 The allowable deviation of the surface flatness of cement mortar or concrete base, the value specified in the "Construction Specifications" shall not be greater than 5mm, and the maximum deviation value of this standard can be 6mm. Inspection method: Check with a 2m ruler and a wedge-shaped feeler gauge. 3.2.3.2
The slope of the cement mortar or concrete base surface shall comply with the provisions of the design documents, and the allowable deviation is ±0.2% of the slope length, but the maximum deviation value shall not exceed 30mm.
Inspection method: measurement inspection.
3.3 Steel structure base
1 The quality inspection of the guarantee project shall comply with the following provisions: The level of surface treatment of the steel structure shall comply with the provisions of the design requirements. Inspection method: Check the construction records.
3.3.2 The quality inspection of the basic project shall comply with the following provisions: 3.3.2.1 The quality of the surface of the first-level steel structure: Qualified: There is no visible grease, dirt, oxide scale, rust and paint coating on the surface.
Excellent: On the basis of qualified, any remaining traces can only be slight spots in the form of dots or stripes.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Inspection method: Observation inspection.
2Quality of the surface of secondary steel structure:
Qualified: There is no visible grease and dirt on the surface, and there are no loosely attached oxide scale, rust and paint coating. Excellent: On the basis of qualification, the tightly attached oxide scale, pitting rust pits or old paint and other spot-like residues shall not exceed 1/3 within an area of 10000mm. Inspection method: Observation and inspection.
3.4 Wood base
1 The quality inspection of the guarantee project shall comply with the following provisions: 3.4.1
The moisture content of wood and the base treatment shall comply with the design requirements and the provisions of the "Construction Code"; the moisture content shall not be greater than 15%.
Inspection method: Check the construction records and the wood moisture content test report. 3.4.2 The quality inspection of basic items shall comply with the following provisions: Appearance quality of wood base:
Qualified: The surface is basically flat, without oil, dust and other pollution; knots and resins are treated.
Excellent: The surface is flat, free of oil, dust and other pollution, knots and resins should be treated and the wood grain of the filling wood should be consistent with the original wood. Inspection method: Observation and inspection of construction records. Engineering Construction Standard Full Text Information System1
The moisture content of wood and the base treatment shall comply with the design requirements and the provisions of the "Construction Specifications"; the moisture content shall not be greater than 15%.
Inspection method: Check the construction records and the wood moisture content test report. 3.4.2 The quality inspection of basic items shall comply with the following provisions: Appearance quality of the wood base:
Qualified: The surface is basically flat, free of oil, dust and other pollution; knots and resins are treated.
Excellent: The surface is flat, free of oil, dust and other pollution, knots and resins should be treated and the wood grain of the filled wood is consistent with the original wood. Inspection method: Observation inspection and inspection of construction records. Engineering Construction Standards Full-text Information System1
The moisture content of wood and the base treatment shall comply with the design requirements and the provisions of the "Construction Specifications"; the moisture content shall not be greater than 15%.
Inspection method: Check the construction records and the wood moisture content test report. 3.4.2 The quality inspection of basic items shall comply with the following provisions: Appearance quality of the wood base:
Qualified: The surface is basically flat, free of oil, dust and other pollution; knots and resins are treated.
Excellent: The surface is flat, free of oil, dust and other pollution, knots and resins should be treated and the wood grain of the filled wood is consistent with the original wood. Inspection method: Observation inspection and inspection of construction records. Engineering Construction Standards Full-text Information System
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