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Cement-based capillary crystalline waterproof coating and preparation method thereof

A osmotic crystalline waterproofing and cement-based technology, which is applied in the field of building waterproofing materials, can solve the problems of non-permanent waterproofing effect, achieve the effects of improving non-permanent waterproofing effect, excellent impermeability and waterproof performance, and increasing impervious pressure

Active Publication Date: 2021-04-30
北京圣洁防水材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problem that the waterproof effect is not durable in an environment with large temperature changes, the application provides a cement-based permeable crystalline waterproof coating and a preparation method thereof

Method used

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  • Cement-based capillary crystalline waterproof coating and preparation method thereof
  • Cement-based capillary crystalline waterproof coating and preparation method thereof
  • Cement-based capillary crystalline waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0047] Preparation example 1 provides a kind of calcium aluminate modified by silane coupling agent, and its preparation steps are:

[0048] (1) Add 40 g of vinyltriethoxysilane into 200 mL of 30 wt % ethanol aqueous solution, stir evenly, adjust the pH of the solution to 4, and stir to obtain a silane coupling agent solution;

[0049] (2) Add 50 g of calcium aluminate into 100 mL of silane coupling agent solution, stir, filter, wash, and dry to obtain calcium aluminate modified by silane coupling agent.

[0050] Preparation Examples 2-6 are the same as Preparation Example 1, except that the silane coupling agent is different, see Table 2 for details.

[0051] Table 2

[0052]

Embodiment 1

[0056] Embodiment 1 provides a kind of cement-based permeable crystalline waterproof coating, and its preparation steps are as follows:

[0057] S1: Mix 40g of cement and 20g of quartz sand, stir, then add 5g of calcium aluminate modified by a silane coupling agent, and stir to obtain a powder;

[0058] S2: Mix 15g vinyl acetate-ethylene copolymer emulsion, 10g cross-linked flexible waterproof silicone rubber emulsion, 10g deionized water and 0.2g additives, stir, then add 5g polyvinyl alcohol and 3g hydroxypropyl methylcellulose , stirring, adding 3g of methyl silicate, stirring to obtain a slurry;

[0059] S3: Mix the powder and the slurry, add water and stir evenly to prepare a cement-based penetrating crystalline waterproof coating that can be used immediately;

[0060] Wherein, the mass ratio of the powder, slurry and water is 1:0.4:0.6; the cement is 425 ordinary Portland cement; the average particle size of the quartz sand is 55 mesh (obtained by further screening); T...

Embodiment 2-3

[0061] Example 2-3 is the same as Example 1, except that the quality of the raw materials for the preparation of the cement-based osmotic crystalline waterproof coating is different, as shown in Table 3 for details.

[0062] table 3

[0063] components Example 1 Example 2 Example 3 cement (g) 40 60 50 Quartz sand (g) 20 30 25 Calcium aluminate modified by silane coupling agent (g) 5 8 7 Vinyl acetate-ethylene copolymer emulsion (g) 15 25 20 Cross-linked flexible waterproof silicone rubber emulsion (g) 10 20 15 Methyl silicate (g) 3 5 4 Hydroxypropyl Methyl Cellulose (g) 3 5 4 Polyvinyl alcohol (g) 5 10 8 Deionized water (g) 10 15 12 Auxiliary dosage (g) 0.2 0.4 0.3 Auxiliary composition (mass ratio of dispersant, film former, defoamer) 1:1.2:0.6 1:1.4:0.8 1:1.3:0.7 Mass ratio of powder, slurry and water 1:0.4:0.6 1:0.6:0.7 1:0.6:0.6

[0064] Examples 4-8 are the sa...

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Abstract

The invention relates to a building waterproof material, in particular to a cement-based capillary crystalline waterproof coating and a preparation method thereof. The cement-based capillary crystalline waterproof coating comprises powder, slurry and water, wherein the mass ratio of the powder to the slurry to the water is 1:(0.4-0.6):(0.6-0.7); the powder comprises the following components in parts by weight: 40-60 parts of cement, 20-30 parts of quartz sand and 5-8 parts of silane coupling agent modified calcium aluminate; the slurry is prepared from the following raw materials in parts by weight: 15-25 parts of vinyl acetate-ethylene copolymer emulsion, 10-20 parts of cross-linked flexible waterproof silicone rubber emulsion, 3-5 parts of methyl silicate, 3-5 parts of hydroxypropyl methyl cellulose, 5-10 parts of polyvinyl alcohol, 10-15 parts of deionized water and 0.2-0.4 part of auxiliaries; the viscosity of the vinyl acetate-ethylene copolymer emulsion is 1300-2000 mPa.s at the temperature of 25 DEG C; and the alcoholysis degree of the polyvinyl alcohol is 94-98 mol%. The cement-based capillary crystalline waterproof coating provided by the invention has excellent impermeability and waterproof performance, and can obviously improve the problem that the waterproof effect is not lasting in an environment with large temperature change.

Description

technical field [0001] The application relates to building waterproof materials, in particular to a cement-based permeable crystalline waterproof coating and a preparation method thereof. Background technique [0002] In recent years, water safety incidents have often occurred due to poor waterproofing of underground structures and buildings. Water leakage in buildings not only adversely affects the living environment of residents, but also affects the service life of buildings. At the same time, the long-term water seepage of the underground concrete structure will cause a large loss of calcium in the concrete, and it will also cause the steel bars in the concrete to corrode, thereby destroying the integrity of the underground concrete structure. [0003] Concrete is a porous substance, and capillary pores and microcracks are the root causes of concrete leakage. Temperature, humidity changes and external loads will aggravate concrete leakage. The waterproof coating made o...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/42C04B14/02C04B24/26C04B111/27
CPCC04B24/425C04B28/04C04B2111/00508C04B2111/27C04B14/06C04B24/2623C04B24/42C04B24/383C04B24/16C04B2103/0068C04B2103/50C04B14/022
Inventor 郑丹
Owner 北京圣洁防水材料有限公司
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