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Silica sol-silane emulsion capillary crystalline waterproof material and preparation method thereof

A technology of silane emulsion and osmotic crystallization, applied in the direction of coating, etc., to achieve the effect of preventing intrusion, environmental friendliness and good waterproof effect

Active Publication Date: 2014-08-06
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the current common concrete waterproof materials, aiming at the deficiencies of the existing silane emulsion permeable waterproof materials, to provide a silica sol-silane emulsion permeable crystalline waterproof material and its preparation method. Silica sol, due to its high pozzolanic activity, can effectively absorb Ca(OH) released by cement hydration 2 , improve the interface between cement hardened paste and aggregate, refine Ca(OH) 2 grains, increase the density of concrete, so it can make up for the defects of poor waterproof effect of silane emulsion, and improve the mechanical properties and durability of concrete

Method used

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  • Silica sol-silane emulsion capillary crystalline waterproof material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0019] In this example, 1 kg of silica sol-silane emulsion permeated crystalline waterproof material was prepared. The raw materials used and the preparation process are as follows:

[0020] Mix 100g of silica sol and 30g of γ-glycidyl triethoxysilane, and add 700g of methyl triethoxysilane emulsion and 15g of fatty alcohol polyoxyethylene ether succinate half ester in sequence under stirring at 800r / min Sulfonate, 1.2g isopropanol, 3g tartaric acid, 15g polyvinyl alcohol, then adjust the pH value to 4.0 with phosphoric acid, react at 55°C for 5h, and finally add water to make up to 1kg.

[0021] In this example, the prepared silica sol-silane emulsion infiltrating crystalline waterproof material is painted on the surface of dry mortar test block and concrete at room temperature, and the amount of coating film is 0.5kg / m 2 , The water absorption rate of the mortar is reduced by 55.2%, the penetration depth of the waterproof material on the concrete surface reaches 5.2mm, the w...

Embodiment 2

[0023] In this example, 1 kg of silica sol-silane emulsion permeated crystalline waterproof material was prepared. The raw materials used and the preparation process are as follows:

[0024] Mix 200g of silica sol and 80g of γ-glycidyl triethoxysilane, and add 600g of methyltriethoxysilane emulsion and 13.5g of alkylphenol polyoxyethylene ether succinic acid in sequence under stirring at 800r / min Half ester sulfonate, 1.0g isopropanol, 3g tartaric acid, 18g polyvinyl alcohol, then adjust the pH value to 4.5 with phosphoric acid, react at 55°C for 6h, and finally add water to make up to 1kg.

[0025] In this example, the prepared silica sol-silane emulsion infiltrating crystalline waterproof material is painted on the surface of dry mortar test block and concrete at room temperature, and the amount of coating film is 0.5kg / m 2 , The water absorption rate of the mortar is reduced by 52.7%, the penetration depth of the waterproof material on the concrete surface reaches 4.7mm, th...

Embodiment 3

[0027] In this example, 1 kg of silica sol-silane emulsion permeated crystalline waterproof material was prepared. The raw materials used and the preparation process are as follows:

[0028] Mix 300g of silica sol and 100g of γ-aminopropyltriethoxysilane, and add 500g of methyltriethoxysilane and 15g of fatty alcohol polyoxyethylene ether succinate half-ester sulfonic acid in sequence under stirring at 800r / min Salt, 1.2g isopropanol, 3g tartaric acid, 20g polyvinyl alcohol, then adjust the pH value to 4.5 with phosphoric acid, react at 55°C for 6h, and finally add water to make up to 1kg.

[0029] In this example, the prepared silica sol-silane emulsion infiltrating crystalline waterproof material is painted on the surface of the dry mortar test block and concrete at room temperature, and the amount of coating film is 0.6kg / m 2 , The water absorption rate of the mortar is reduced by 61.6%, the penetration depth of the waterproof material on the concrete surface reaches 5.0mm,...

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Abstract

The invention belongs to the technical field of building construction materials and preparation of the building construction materials, and relates to a silica sol-silane emulsion capillary crystalline waterproof material and a preparation method thereof. The preparation method comprises the following steps: at first, mixing silica sol, silane emulsions, silane coupling agents, stabilizers, isopropanol, tartaric acid and coalescing agents, controlling the temperature to 50-70 DEG C, stirring all the time, sufficiently reacting for 4-8 h, cooling, and then regulating the pH value to 3.5-5.5 with phosphoric acid, wherein the weight percentage of the silica sol, the silane emulsions, the silane coupling agents, the stabilizers, the tartaric acid and the coalescing agents are respectively 10%-60%, 20%-70%, 5%-15%, 1%-3%, 0.08%-0.5% and 1%-3%; at last, adding water to enable the weight percentage to 100% to obtain the silica sol-silane emulsion capillary crystalline waterproof material. The preparation process is simple, the cost is low, the water-proof effect is good, and the waterproof material is environment-friendly.

Description

Technical field: [0001] The invention belongs to the technical field of construction engineering materials and their preparation, and relates to a silica sol-silane emulsion permeable crystalline waterproof material and a preparation method thereof. Background technique: [0002] Concrete is the largest building material and the most important structural material in the world. At the same time, concrete is also a heterogeneous, porous, highly permeable material with microscopic crack structure and rough surface. Under normal circumstances, properly prepared and well maintained concrete can achieve long-term service. However, if the concrete is exposed to harsh environmental conditions and not adequately protected, the concrete will fail prematurely. Most of the durability degradation process and mechanism of concrete are closely related to the existence of water and its migration. For example, in the long-term contact between concrete materials and water, water can graduall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D183/07C09D1/00
Inventor 李绍纯赵铁军金祖权张馨元耿永娟
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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