Waterproof anticorrosion agent for cement mortar and concrete and preparation thereof

A cement mortar and preservative technology, applied in the field of waterproof preservatives and their preparation, can solve the problems of high packaging and transportation costs, prolong the construction period, increase the stacking site, etc., and achieve shortening the production cycle, reducing the stacking site, and construction pollution-free Effect

Active Publication Date: 2014-12-24
王广茂 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2. Extend the construction period, increase the stacking site, and the overall cost is high - after the construction of the PCCP mortar protective layer, it takes about seven days of maintenance before the epoxy coal tar pitch paint can be sprayed
[0007] 3. Epoxy coal tar pitch paint is a toxic and harmful substance with a serious stench
[0008] 4. The cost of packaging and transportation is high - the epoxy coal tar pitch paint is liquid and needs to be packaged in iron drums or plastic drums. The cost of packaging materials and transportation is 5-10 times that of powder
[0009] 5. Other liquid waterproof coatings have similar shortcomings to the above-mentioned epoxy coal tar pitch coatings

Method used

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  • Waterproof anticorrosion agent for cement mortar and concrete and preparation thereof
  • Waterproof anticorrosion agent for cement mortar and concrete and preparation thereof
  • Waterproof anticorrosion agent for cement mortar and concrete and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A cement mortar, concrete waterproof preservative, the prescription of this waterproof preservative comprises, stearic acid 30g, oleic acid 20g, polyvinyl alcohol 5g, monoglyceride 40g, sodium hydroxide 2g and phosphate 3g.

[0039] The preparation of above-mentioned waterproof preservative is as follows:

[0040] (1) Prepare 20% sodium hydroxide solution with 2g of sodium hydroxide;

[0041] (2) Add stearic acid, oleic acid and polyvinyl alcohol in the above raw materials to the reaction kettle, then heat to 120°C, and then slowly add the sodium hydroxide solution prepared in step (1) (you can also buy prepared Subconcentration of sodium hydroxide is used directly), heat preservation reaction at 120-150°C for 60-90 minutes, then add monoglyceride and phosphate, and continue the reaction for 45-60 minutes, so that the surfactant monoglyceride and the corrosion inhibitor phosphate Uniformly dispersed in the hydrophobic polymer compound. Then stop heating, cool, dischar...

Embodiment 2

[0043] A cement mortar, concrete waterproof preservative, the prescription of this waterproof preservative comprises, stearic acid 33g, oleic acid 26g, polyvinyl alcohol 3g, monoglyceride 33g, sodium hydroxide 3g and phosphate 2g.

[0044] The preparation of above-mentioned waterproof preservative is as follows:

[0045] (1) Prepare 3g of sodium hydroxide into a 25% sodium hydroxide solution;

[0046] (2) Add stearic acid, oleic acid and polyvinyl alcohol in the above raw materials to the reaction kettle, then heat to 100°C, then slowly add the sodium hydroxide solution prepared in step (1), and keep warm at 100-130°C React for 60-90 minutes, then add monoglyceride and phosphate, and continue to react for 45-60 minutes, so that the surfactant monoglyceride and the corrosion inhibitor phosphate are evenly dispersed in the hydrophobic polymer compound. Then stop heating, cool, discharge, crush and pack.

Embodiment 3

[0048] A cement mortar, concrete waterproof preservative, the prescription of this waterproof preservative comprises, stearic acid 37g, oleic acid 20g, polyvinyl alcohol 4g, span 8035g, sodium hydroxide 3g and phosphate 1g.

[0049] The preparation of above-mentioned waterproof preservative is as follows:

[0050] (1) Prepare 30% sodium hydroxide solution with 3g of sodium hydroxide;

[0051] (3) Add stearic acid, oleic acid and polyvinyl alcohol in the above raw materials to the reaction kettle, then heat to 130°C, then slowly add the sodium hydroxide solution prepared in step (1), and keep warm at 130-150°C React for 60-90 minutes, then add monoglyceride and phosphate, continue to react for 45-60 minutes, then stop heating, cool, discharge, crush and pack.

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Abstract

The invention provides a waterproof anticorrosion agent for cement mortar and concrete and preparation thereof, and belongs to the field of building material waterproof anticorrosion agents. The waterproof anticorrosion agent comprises stearic acid, oleic acid, polyvinyl alcohol, a surfactant, sodium hydroxide and an anticorrosion corrosion-inhibiting agent with the mass ratio of 30-40:20-30:3-5:30-40:2-3:1-5. The preparation method of the agent comprises: preparing a sodium hydroxide solution; mixing stearic acid, oleic acid and polyvinyl alcohol, heating to 100-130 DEG C, so as to obtain a mixed solution; and adding the sodium hydroxide solution into the mixed solution, performing warm-keeping reaction, then adding the surfactant and the anticorrosion corrosion-inhibiting agent, continuing the reaction, and then stopping heating and cooling. The waterproof anticorrosion agent has the advantages of excellent waterproof and anticorrosion performances, firm structure, long service life, simple and convenient construction, short production period, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of waterproof preservatives for building materials, in particular to a waterproof preservative and its preparation. Background technique [0002] Prestressed steel cylinder concrete pipe (referred to as PCCP) is a special water pipe for the national key project of South-to-North Water Diversion. The waterproof and anti-corrosion performance of the cement mortar protective layer of the water pipe is the key to protect the steel wire and steel cylinder in the water pipe from corrosion, ensure the durability of PCCP and improve the quality. At present, the main material for waterproofing and anti-corrosion of the protective layer is epoxy coal tar pitch paint, but it is generally believed that the construction environment of epoxy coal tar pitch paint is harsh, and the waterproof and anti-corrosion effects are not ideal. [0003] At present, the domestic mortar concrete waterproof materials are almost all liqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26
Inventor 王广茂王侃王俊
Owner 王广茂
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