Concrete surface waterproof coating and preparation method and application thereof

A technology of concrete surface and waterproof coating, applied in the direction of coating, etc., can solve the problems of complicated process, time-consuming preparation, high production cost, etc., and achieve the effect of simple preparation process, easy control and good film-forming property

Active Publication Date: 2019-11-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Though this method has obtained the silane emulsion waterproofing agent of stable non-layering and environmental friendliness, process method is more complicated and needs to react at 60-80 ° for 8-10 hours to obtain reactant when polymer base material is prepared, and preparation is comparatively relatively complicated. Time consuming and expensive to produce

Method used

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  • Concrete surface waterproof coating and preparation method and application thereof
  • Concrete surface waterproof coating and preparation method and application thereof
  • Concrete surface waterproof coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh 600g of deionized water, 24g of water-soluble PVA fiber, 49.8g of polymethylhydrogensiloxane and 15g of metakaolin powder;

[0049] Each above-mentioned component is made the required concrete surface waterproof coating of the present invention by following steps:

[0050] (1) Dissolve the 90-degree water-soluble PVA fiber measured as 24g in deionized water with a quality of 550g, and heat it in a 100° water bath for 2h to obtain the PVA aqueous solution; Hydrogen siloxane, then disperse at 5000rpm for 5min, then adjust the speed to 6000rpm and disperse for 5min to obtain PVA / siloxane polymer emulsion;

[0051] (2) Dissolve the metakaolin powder measured as 15g in 50g deionized water, ultrasonically disperse for 1h and magnetically stir for 1h to obtain a uniformly dispersed metakaolin solution;

[0052] (3) Slowly add the dispersed metakaolin solution into the above-mentioned PVA / siloxane polymer emulsion, and disperse at 5000 rpm for 10 minutes to obtain a hydr...

Embodiment 2

[0062] Weigh 600 g of deionized water, 30 g of water-soluble PVA fiber, and 60 g of hydroxypolydimethylsiloxane.

[0063] Each above-mentioned component is made the required concrete surface waterproof coating of the present invention by following steps:

[0064] (1) Dissolve the 40-degree water-soluble PVA fiber measured as 30 g in deionized water, and heat it in a 50-degree water bath for 1 hour to obtain an aqueous PVA solution;

[0065] (2) Slowly add 60 g of hydroxyl polydimethylsiloxane to the PVA aqueous solution, then disperse at 5000 rpm for 5 minutes, then adjust the speed to 6000 rpm and disperse for 5 minutes to obtain a PVA / siloxane polymer emulsion. In this embodiment, the PVA / siloxane polymer emulsion is the target product hydrophobic emulsion (waterproof coating for concrete surface) to be prepared.

[0066] It can be seen that the concrete surface waterproof coating (hydrophobic emulsion) prepared in this embodiment includes the following components: 600 g of...

Embodiment 3

[0070] Weigh 600 g of deionized water, 30 g of water-soluble PVA fiber, 42 g of hydroxyl polydimethylsiloxane, and 18 g of silane coupling agent. The silane coupling agent is KH792 or N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

[0071] The difference between this example and Example 2 is that the amount of hydroxypolydimethylsiloxane is reduced, and the amount of reduction of hydroxypolydimethylsiloxane happens to be the amount of newly added silane coupling agent.

[0072] Each above-mentioned component is made the required concrete surface waterproof coating of the present invention by following steps:

[0073] (1) Dissolve the 40-degree water-soluble PVA fiber measured as 30 g in deionized water, and heat it in a 50-degree water bath for 1 hour to obtain an aqueous PVA solution;

[0074] (2) Slowly add 42g of hydroxyl polydimethylsiloxane and 18g of silane coupling agent into the PVA aqueous solution, then disperse at 5000rpm for 5min, then adjust the speed to 6000rpm...

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Abstract

The invention discloses concrete surface waterproof coating and a preparation method and application thereof. The concrete surface waterproof coating is a hydrophobic emulsion, and the hydrophobic emulsion is prepared from the components in parts by weight: 300-600 parts of deionized water, 12-60 parts of a siloxane polymer and 15-30 parts of water-soluble PVA fiber. During using, the hydrophobicemulsion impregnates a mortar test block, and thus hydrophobic concrete with the contact angle being 120-145 degrees and smooth surface can be obtained. The concrete surface waterproof coating has theadvantages that a preparation technology of the hydrophobic emulsion is simple, good compatibility between the PVA fiber and the concrete surface is achieved, binding of the hydrophobic emulsion andthe concrete surface is more facilitated, the organic macromolecule emulsion is good in film forming property and has certain durability, operation is easy, and the concrete surface waterproof coatingis suitable for large-scale production.

Description

Technical field: [0001] The invention relates to a concrete surface waterproof coating. [0002] The invention also relates to a preparation method and application of the above concrete surface waterproof coating. Background technique: [0003] Finishing mortar is a kind of inorganic mineral plastering mortar and mostly cement-based finishing mortar is used for decoration on the surface of building walls, but it is prone to efflorescence, peeling and color difference during application, which affects the appearance. Methods to inhibit efflorescence include reducing soluble salts, increasing compactness, reducing internal and external moisture, and improving curing conditions. Among them, for waterproofing, traditional methods include adding waterproof additives and water-repellent agents, but there are environmental pollution and easy Volatility and lack of guaranteed long-term effects. [0004] Hydrophobic emulsion surface waterproof coatings are mostly based on silane em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D183/05C09D129/04C09D7/63C09D7/61C04B41/68C04B41/64C04B41/65
CPCC04B41/4966C04B41/5035C04B41/5037C04B41/64C04B41/65C04B41/68C08K2201/011C08L2205/16C09D129/04C09D183/04C09D7/61C09D7/63C04B41/4961C04B41/4869C04B41/4539C04B41/4944C08L29/04C08K3/346C08K5/544C08L83/04C08K3/36
Inventor 王瑞兴陈伊非刘志强马阳
Owner SOUTHEAST UNIV
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