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A kind of water-resistant dispersion concrete and preparation method thereof

A water-resistant dispersion and concrete technology, which is applied in the field of building materials, can solve problems such as longer construction period, increased engineering cost, and reduced strength, and achieve high hydrophobicity and durability, improved water-dispersion resistance, and reduced adsorption performance. Effect

Active Publication Date: 2022-08-02
CHINA ROAD & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When ordinary concrete is poured directly in a water environment, it will be affected by water and cause separation, cement loss, and strength decline and cause environmental pollution.
The cofferdam water isolation method is usually used to solve the problem of underwater concrete pouring, but this method will make the construction process more complicated, the construction period will be longer, the project cost will be greatly increased, and it is difficult to ensure the quality of underwater concrete

Method used

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  • A kind of water-resistant dispersion concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A water-resistant dispersion concrete, calculated in parts by weight, comprising the following components: 300 parts of cement; 60 parts of fly ash; 600 parts of regenerated fine aggregate; 800 parts of regenerated coarse aggregate; 100 parts of regenerated fine powder; 5 parts; 100 parts of metakaolin; 160 parts of modified nano-silica dispersion; 3 parts of organosilane; 1 part of polyvinyl alcohol; 5 parts of polymethyl acrylate; 3 parts of triethanolamine; 1 part of polyacrylamide; polyethylene glycol 1 part and 6 parts polypropylene fiber.

[0049] Its preparation method is as follows:

[0050] (1) Weigh each component according to the ratio of raw materials, first add the weighed cement, fly ash, recycled fine aggregate, recycled coarse aggregate, recycled fine powder, metakaolin, and synthetic fiber, and stir for 2 minutes;

[0051] (2) add water reducer, modified nano-silica dispersion, organosilane, polyvinyl alcohol to the product obtained in step (1) again, ...

Embodiment 2

[0055] A water-resistant dispersion concrete, calculated in parts by weight, comprising the following components: 600 parts of cement; 200 parts of fly ash; 800 parts of recycled fine aggregates; 1,100 parts of recycled coarse aggregates; 200 parts of recycled fine powder; 15 parts; 200 parts of metakaolin; 240 parts of modified nano-silica dispersion; 10 parts of organosilane; 5 parts of polyvinyl alcohol; 15 parts of polymethyl acrylate; 5 parts of triethanolamine; 3 parts of polyacrylamide; polyethylene glycol 5 parts and 6 parts polyvinyl alcohol fiber.

[0056] (1) Weigh each component according to the ratio of raw materials, first add the weighed cement, fly ash, recycled fine aggregate, recycled coarse aggregate, recycled fine powder, metakaolin, and synthetic fiber, and stir for 2 minutes;

[0057] (2) add water reducer, modified nano-silica dispersion, organosilane, polyvinyl alcohol to the product obtained in step (1) again, and stir for 3min;

[0058] (3) adding po...

Embodiment 3

[0061] A water-resistant dispersion concrete, calculated in parts by weight, comprising the following components: 400 parts of cement; 100 parts of fly ash; 750 parts of recycled fine aggregate; 1000 parts of recycled coarse aggregate; 150 parts of recycled fine powder; 10 parts; 150 parts of metakaolin; 180 parts of modified nano-silica dispersion; 6 parts of organosilane; 3 parts of polyvinyl alcohol; 10 parts of polymethyl acrylate; 4 parts of triethanolamine; 23 parts of polyacrylamide; 3 parts alcohol and 6 parts synthetic fibers.

[0062] (1) Weigh each component according to the ratio of raw materials, first add the weighed cement, fly ash, recycled fine aggregate, recycled coarse aggregate, recycled fine powder, metakaolin, and synthetic fiber, and stir for 2 minutes;

[0063] (2) add water reducer, modified nano-silica dispersion, organosilane, polyvinyl alcohol to the product obtained in step (1) again, and stir for 3min;

[0064] (3) adding polymethyl acrylate, tri...

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Abstract

The invention belongs to the technical field of building materials, and in particular relates to a water-resistant dispersed concrete and a preparation method thereof. Calculated according to the parts by weight, it includes the following components: 300-600 parts of cement; 60-200 parts of fly ash; and recycled fine aggregate 600~800 parts; 800~1100 parts of recycled coarse aggregate; 100~200 parts of recycled fine powder; 5~15 parts of water reducing agent; 100~200 parts of metakaolin; 160~240 parts of modified nano-silica dispersion; 3~10 parts; polyvinyl alcohol 1~5 parts; polymethyl acrylate 5~15 parts; triethanolamine 3~5 parts; polyacrylamide 1~3 parts; polyethylene glycol 1~5 parts and synthetic fibers 0~ 6 servings. The water-resistant dispersed concrete provided by the invention realizes the direct pouring of the concrete in water, does not segregate in water, the cement does not run off, can be self-leveling and self-compacting when entering the water, no need to vibrate, no environmental pollution to the construction water area, and uniform concrete quality. Reliable, has a significant positive impact on underwater concrete durability, workability and cost control.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to concrete, in particular to a water-resistant dispersed concrete and a preparation method thereof. Background technique [0002] So far, concrete is still one of the most important and most used building materials in underwater engineering. The performance of concrete will directly affect the quality and progress of underwater engineering. When ordinary concrete is directly poured in a water environment, it will be affected by water, resulting in separation, loss of cement, loss of strength and environmental pollution. The cofferdam water barrier method is usually used to solve the problem of underwater pouring of concrete, but this method will make the construction process complicated, the construction period will be longer, the engineering cost will be greatly increased, and it is difficult to ensure the quality of the underwater concrete. [0003] In view of the defec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/16C04B111/20C04B111/74
CPCC04B28/00C04B18/16C04B2201/50C04B2111/20C04B2111/74C04B18/08C04B2103/302C04B14/106C04B14/062C04B24/42C04B24/2623C04B24/2641C04B24/122C04B24/2652C04B24/32C04B16/0633C04B16/0641C04B16/06Y02W30/91
Inventor 郭猛宋普涛肖瑶夏京亮龙行王晶吕欢杨清源王祖琦周永祥冷发光
Owner CHINA ROAD & BRIDGE