CECS : 18-2000 Technical specification for anti-corrosion engineering of polymer cement mortar cecs18:2000
Some standard content:
CECS 18:2000
China Association for Engineering Construction Standardization Standard
Technical specification for anticorrosion works of polymer cement mortar
China Association for Engineering Construction Standardization Standard
Technical specification for anticorrosion works of polymer cement mortar
18:2000
Editor: China Huanqiu Chemical Engineering Corporation Approval: China Association for Engineering Construction Standardization Effective date: December 1, 2000
2000 Beijing
This specification is formulated in accordance with the requirements of the Notice on Issuing Recommended Engineering Construction Standards and Specifications (93) No. 12 of China Association for Engineering Construction Standardization. This specification is compiled on the basis of summarizing the practical experience and scientific experiments of domestic polymer cement mortar anticorrosion works. It specifies the technical requirements for the design, construction and acceptance of the anti-corrosion materials of chloroprene latex cement mortar and polyacrylate emulsion cement mortar.
The association standard "Technical Specification for Anti-Corrosion Engineering of Polymer Cement Mortar" is now approved, numbered CECS18:2000, and is recommended for use by engineering construction design, construction and material production units. This specification is managed by the Anti-Corrosion Committee of the China Engineering Construction Standardization Association (China Global Chemical Engineering Company, North of Heping Street, Beijing, Postal Code: 100029), and is responsible for interpretation. If you find any need for modification and supplementation during use, please send your opinions and information directly to the interpretation unit.
Editor-in-chief: China Huanqiu Chemical Engineering Company Co-editor: Nanjing Hydraulic Science Research Institute, Dalian Chemical Research and Design Institute Main drafters: Bai Yue, Lin Baoyu, Li Changmu, He Jinyuan Contact number: 64434433-218
368026306
China Engineering Construction Standardization Association
September 30, 2000
Quality requirements for raw materials and finished products
Design regulations
3.1 Scope of application
3.2 Structural requirements
Construction regulations
General regulations
Mix ratio
Preparation of polymer cement mortar
Construction of the overall surface layer
4.5 Construction of the block surface layer
Engineering quality inspection and acceptance
5.1Engineering quality inspection
Engineering acceptance…
Appendix A
Test methods for raw materials
Appendix B
Test methods for finished products
Terms used in this specification
1.0.1 This specification is formulated to ensure the quality of the design and construction of polymer cement mortar anti-corrosion projects
1.0.2 This specification is applicable to the design, construction and acceptance of anti-corrosion projects of chloroprene latex cement mortar (hereinafter referred to as chloroprene mortar) and polyacrylate emulsion cement mortar (hereinafter referred to as acrylic latex mortar).
When other types of polymer cement mortar are used, they should be determined through tests. 1.0.3 Polymer cement mortar anti-corrosion engineering includes: polymer cement mortar paving the entire surface layer; 1
2 polymer cement mortar paving the block surface layer. 1.0.4 The design, construction and acceptance of polymer cement mortar anti-corrosion engineering shall comply with the provisions of the current national standards GB50046, GB50212, GB50224, GB50046 ...
Total solid content (%)
Density (g/cm2)
Storage stability
Note: For viscosity determination method, see Appendix A
Quality indicators of latex and emulsion
Cationic chloroprene latex
Polyacrylate emulsion
Milky white uniform emulsion without precipitation
10~55(MPa.s)
11.5~12.5(s)
540℃, no obvious precipitation for three months
2.0.2 When using cationic chloroprene latex to prepare polymer cement mortar, additives such as stabilizer, defoamer and pH adjuster should be added. The quality of the additives shall meet the following requirements: The mixed polymer cement mortar shall have good workability and shall not have a large number of bubbles.
2 The additives shall change the latex from acidic to alkaline, and the latex shall not demulsify when mixing the polymer cement mortar.
2.0.3 When using polyacrylate emulsion to prepare polymer cement mortar, no additional additives shall be added.
2.0.4 When mixing chloroprene mortar, silicate cement or ordinary silicate cement with a grade of not less than 425 shall be used; when mixing acrylic emulsion mortar, silicate cement or ordinary silicate cement with a grade of not less than 525 shall be used. Www.bzxZ.net
2.0.5 Fine aggregate shall be quartz sand or river sand. Sand should meet the requirements of the current national standard "Sand for Construction" GB/T14684-93, and its quality and particle size distribution should comply with the requirements of Table 2
2.0.5-1 and 2.0.5-2.
Table 2.0.5-1
Quality of fine aggregate
Mica contentSulfide content
Mud content
Sieve hole (mm)
Sieve residue (%)
Table 2.0.5-2
Organic matter content
Lighter than the standard color (if darker than the standard color, it should be made into mortar for strength comparison test, and the compressive strength ratio should not be lower than 0.95）
Grade of fine aggregate
0～25
Note: The maximum particle size of fine aggregate should not exceed 1/30.315
70~929
90~100
2.0.6 Glass cloth should be non-paraffin emulsion type non-robber roving glass fiber square plain woven glass cloth, the thickness should be 0.2mm, and the warp and weft density should be 4X4～8X8 yarns per square centimeter.
The quality of polymer cement mortar should meet the requirements of Table 2.0.7. 2.0.7
Initial setting time (min)
Final setting time (h)
Compressive strength (MPa)
Bond strength with cement mortar
Quality of polymer cement mortar
Chloroprene mortar
Acrylic emulsion mortar
Design regulations
Scope of application
3.1.1 The design of the anti-corrosion process of polymer cement mortar shall be determined comprehensively based on factors such as the nature, concentration, temperature and action conditions of the medium. 3.1.2 At room temperature, polymer cement mortar can be used in areas where chemical atmosphere and corrosive water act, and can also be used in areas where acidic media with a concentration of no more than 2% and alkaline media and salt media with a concentration below medium can act. The corrosion resistance of polymer cement mortar can be determined according to Table 3.1.2.
Table 3.1.2 Corrosion resistance of polymer cement mortar (normal temperature) Medium name
Sulfuric acid (%)
Hydrochloric acid (%)
Nitric acid (%)
Acetic acid (%)
Chromic acid (%)
Hydrofluoric acid (%)
Sodium hydroxide (%)
Sodium carbonate
Chloroprene mortar
≤2 Shangnai
<2 Shangnai
≤2 Shangnai
≤2 Shangnai
≤2 Shangnai
≤2 Shangnai
≤20 Shangnai||tt| |Acrylic emulsion mortar
<2 Shangnai
<5 Shangnai
≤5 Shangnai
≤5 Shangnai
≤5 Shangnai
≤20 Shangnai
Continued Table 3.1.2
Name of medium
Ammonium chloride
Ammonium nitrate
Sodium sulfate
5% sulfuric acid and 5% sodium hydroxide alternately
“%” in the table refers to the mass concentration percentage of the medium; Note: 1
The medium without concentration indicated in the table is saturated solution. 2
Chloroprene mortar
Meat emulsion mortar
The physical and mechanical properties of polymer cement mortar can be determined according to Table 3.1.3. Table 3.1.3
Compressive strength (MPa)
Tensile strength (MPa)
Bond strength
Physical and mechanical properties of polymer cement mortarChloroprene mortar
With cement base
With steel base
Impermeability grade (MPa)
Water absorption (%)
Using temperature (℃)
Acrylic emulsion mortar
3.1.4Polymer cement mortar is suitable for paving materials of anti-corrosion integral surface layer and block surface layer in indoor and outdoor floors, skirting boards, wall patches, trenches, storage tanks, pool linings and equipment foundations, and can also be used for repair projects of reinforced concrete structures. 3.2Construction requirements
3.2.1Polymer cement mortar can be applied on cement mortar, concrete, brickwork, block stone masonry or steel base.
3.2.2 The thickness of the overall surface layer of polymer cement mortar shall comply with the provisions of Table 3.2.2. Table 3.2.2 Thickness of the overall surface layer of polymer cement mortar (mm) Item
Storage tank lining
Sewage tank lining
Chloroprene mortar
Acrylic emulsion mortar
15～20
20～25
3.2.3 Generally, no isolation layer is provided for the overall surface layer of polymer cement mortar and the surface layer of blocks paved with polymer cement mortar. When the corrosive liquid medium acts more, a polymer emulsion glass cloth isolation layer (two cloths and three emulsions) can be provided. 3.2.4 When polymer cement mortar is used to pave blocks, the mortar joint width and bonding layer thickness shall comply with the provisions of Table 3.2.4.
Block material types
Acid-resistant bricks
Acid-resistant stone
Thickness ≤ 30
Thickness > 30
Gray joint width and bonding layer thickness (mm)
Gray joint width
Bonding layer thickness
4 Construction regulations
4.1 General regulations
4.1.1 The ambient temperature for the application of polymer cement mortar is 10-35℃. When the ambient temperature for application is lower than 5℃, heating and insulation measures should be taken. It is not suitable to construct in a windy environment or an environment with high temperature and direct sunlight. 4.1.2 Polymer cement mortar should not be applied on a cement base with a curing age of less than 3d. Open-air application should not be carried out when it rains.
4.1.3 Emulsions and additives should be kept away from direct sunlight and prevented from freezing in winter. 4.1.4 When polymer cement mortar is applied on cement base, the surface of the base should be flat, rough, clean, free of oil, floating slurry, and debris, and there should be no sanding, hollowing, cracks, etc. Before application, it should be washed with high-pressure water and kept moist, but no water should be accumulated. 5 When polymer cement mortar is applied on steel base, the surface of the base should be free of oil, floating rust, and the rust removal level should be St3. Welds and overlapping parts should be leveled in advance with polymer cement mortar or polymer cement slurry.
4.1.6 When polymer cement mortar is used to pave the acid-resistant brick surface layer, the acid-resistant brick should be soaked in water for 2 hours in advance, and then the water marks can be wiped off before paving. 4.1.7 The slope of the base should meet the design requirements. When block materials are used for paving, the positive and negative angles of the base should be made into right angles; when the integral surface layer is used, the positive and negative angles of the base should be made into beveled or rounded.
4.1.8 Before the construction of the anti-corrosion project, the appropriate construction mix ratio and operation method should be determined through experiments based on the construction environment temperature, working conditions and materials, and then formal construction can be carried out.
4.1.9 When using polymer emulsion to paste the glass cloth isolation layer, it is advisable to use the continuous method. When applying the top layer of emulsion, a layer of quartz sand with a particle size of 0.7-1.2mm should be evenly spread and the natural curing should not be less than 24 hours. 7
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