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Self-healing efficient mortar waterproof agent and preparation thereof

A waterproofing agent and high-efficiency technology, applied in the field of high-efficiency cement waterproofing agent, can solve the problems of increasing the cost of polymer cement waterproofing concrete, high weight of polymer and cement, and high monomer price

Inactive Publication Date: 2008-10-08
YANBIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the above-mentioned polymer cement waterproofing agent exists or monomer price is higher, or needs special polymer synthesis technology, or high-pressure synthesis equipment and complex process, or the ratio of polymer and cement weight (hereinafter referred to as For problems such as high content) and increase the cost of polymer cement waterproof concrete, it can generally only be used for waterproofing projects with high requirements for frost resistance, crack resistance and impermeability.

Method used

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  • Self-healing efficient mortar waterproof agent and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] [Example 1]: Weigh 52.075g of commercial polystyrene solid particles, put it into a 1L four-necked bottle, pour 125ml of 1,2-dichloroethane, and raise the temperature to 50-60°C to make the polystyrene swell. 534g 92.5% H 2 SO 4 Transfer to the dropping funnel and add dropwise to the four-necked bottle. At the same time, raise the temperature to 80°C, and adjust the stirring speed to a certain speed. After reacting for 4-5 hours, steam dichloroethane while raising the temperature, react for another 4-5 hours, stop the reaction, and cool down. Then add 190ml of distilled water, heat and stir to 96°C, slowly cool under stirring, filter, wash thoroughly, and dry to obtain a light yellow product.

[0010] Put the sulfonated product in a 2L beaker, add 1200ml distilled water to dissolve, slowly stir and add 31.8g (0.3mol) Na 2 CO 3 . Then add calcium oxide to adjust neutrality, filter to remove calcium sulfate, and the filtrate is sodium polystyrene sulfonate solution f...

Embodiment 2

[0011] [Example 2]: Weigh 52.075g of commercial polystyrene solid particles, add it to a 1L four-necked bottle with a water separator, then add 470ml of chlorobenzene, and adjust the vacuum to make the chlorobenzene reflux at 100±5°C. At this time, slowly add 53g (0.5mol) of 92.5% sulfuric acid dropwise, and continue dehydration until 12.5-13ml of water is produced. Increase the degree of vacuum to evaporate most of the chlorobenzene, and then steam distillation to remove all residual chlorobenzene. Add an appropriate amount of water to dilute, adjust neutral with sodium hydroxide, and prepare for use. By controlling the amount of sulfuric acid added, products with different degrees of sulfonation can be obtained.

Embodiment 3

[0012] [Example 3]: use the sulfonated polystyrene obtained in Example 1 as waterproofing agent, use reference cement (Beijing Xingfa Cement Co., Ltd.) and standard sand (Xiamen Aisiou Standard Sand Co., Ltd.), according to national standard JC474 -1999 "Mortar, Concrete Waterproofing Agent"; GB178 "Standard Sand for Cement Strength Test": JC / T603-2004 "Test Method for Drying Shrinkage of Cement Mortar"; GB1346 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method "; GB2419 "Method for Determination of Fluidity of Cement Mortar Sand"; GB8076 "Concrete Admixtures" etc. for testing. The mass ratio of standard cement to standard sand is: 1:3; the water consumption is determined according to the requirements of various tests. Using mechanical stirring, the liquid waterproofing agent is mixed into the mixing water. The concrete vibrating table with a frequency of 50±3HZ and an amplitude of about 0.5mm at no-load is used for compaction, and the vibrati...

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Abstract

The invention relates to an efficient mortar and concrete water-proofing agent having the self-healing function and a method of preparation. Concretely, the invention provides a sulfonated polystyrene water-proofing agent which also has the excellent waterproofing, anti-seepage performance, compression and bending strength under low mixing amount; and the invention provides the method of preparation of the water-proofing agent and has advantages of simple equipment and process and low making cost, and small factories everywhere can produce the water-proofing agent.

Description

[technical field] [0001] The invention relates to a sulfonated polystyrene mortar, a concrete waterproofing agent and a manufacturing method thereof. Specifically, provide a kind of high-efficiency cement waterproofing agent that also has excellent waterproof, anti-seepage performance, compressive and flexural strength properties at low dosage, and has self-healing effect; and provide the cement waterproofing agent The manufacturing method is characterized in that the equipment and process are simple, the manufacturing cost is low, and small factories all over the place can produce it. [Background technique] [0002] In the unhardened state of polymer cement waterproof concrete, due to the interaction between the surfactant contained in the polymer dispersion system and the hydrophilic colloid of the dispersion system itself, its fluidity and bleeding properties are improved to varying degrees. After hardening, the cement hydration product and the polymer network penetrate ...

Claims

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Application Information

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IPC IPC(8): C04B24/16
CPCC04B24/16C04B2103/65
Inventor 姜日善卢会刚高岩
Owner YANBIAN UNIV
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