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A kind of anti-seepage and anti-cracking concrete and preparation method thereof

A technology of concrete and polypropylene short fibers, which is applied in the field of impermeable concrete, can solve the problems of cracks in concrete, cracking of impermeable concrete, reduction of workability and durability of impermeable concrete, etc., so as to improve impermeability and compressive performance. , the effect of improving compressive strength and reducing the risk of cracking

Active Publication Date: 2022-07-05
广州市粤晟混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used method to improve the impermeability is to increase the amount of glue in the concrete mix ratio and increase the air content of the concrete, but the increase in the air content and the decrease in the water-binder ratio both increase the risk of cracks in the concrete, or the impermeable concrete is The severe shrinkage during the hydration process leads to cracking of the impermeable concrete, and these cracks will greatly reduce the workability and durability of the impermeable concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0046] The preparation method of a cellulose synergist is as follows: mixing 8 g of hydroxypropyl methylcellulose, 56 g of octanol and 132 g of water, and stirring for 5 min under the condition of a rotating speed of 120 r / min to obtain a polymer synergistic agent.

preparation example 2

[0048] The difference between this preparation example and preparation example 1 is:

[0049] The dosage of hydroxypropyl methylcellulose is 18g, the dosage of octanol is 90g, and the dosage of synergist water is 198g.

preparation example 3

[0051] The difference between this preparation example and preparation example 1 is:

[0052] Replace hydroxypropyl methylcellulose with an equal amount of carboxyethylcellulose.

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PUM

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Abstract

The invention relates to the field of impermeable concrete, in particular to an impermeable and crack-resistant concrete and a preparation method thereof. The impermeable and crack-resistant concrete comprises cement, river sand, crushed stone, fly ash, mineral powder, water, and cellulose effect agent, swelling agent and polypropylene staple fiber, sodium dioctyl succinate sulfonate, polycarboxylate water reducer. A method for preparing impermeable and crack-resistant concrete is as follows: firstly modifying polypropylene short fibers to obtain modified polypropylene short fibers; Then mix the polycarboxylate water reducing agent, water, sodium dioctyl succinate sulfonate and cellulose synergist to obtain an admixture solution, and mix the admixture solution with cement, fly ash and mineral powder evenly The cement slurry is obtained, and the cement slurry is added into the dry material and stirred evenly to obtain an impermeable and crack-resistant concrete. The present application has the effect of improving the crack resistance of the impermeable concrete.

Description

technical field [0001] The invention relates to the field of impermeable concrete, in particular to an impermeable and crack-resistant concrete and a preparation method thereof. Background technique [0002] Impermeable concrete refers to the concrete with high density, which makes it difficult for water to penetrate through. Impermeable concrete needs to be able to resist hydrostatic pressure of at least 0.6MPa. Impermeable concrete is widely used in underwater piles, underwater engineering and other fields. [0003] The commonly used method to improve the impermeability is to increase the amount of glue material in the concrete mix and increase the air content of the concrete, but the increase of the air content and the reduction of the water-binder ratio increase the risk of cracks in the concrete, or the impermeable concrete is in the concrete. The severe shrinkage during the hydration process leads to cracks in the impermeable concrete, and these cracks will greatly red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B111/27C04B111/34
CPCC04B28/02C04B2111/00293C04B2111/343C04B2111/27C04B2201/50C04B18/08C04B18/141C04B14/06C04B14/02C04B16/0633C04B24/383C04B24/02C04B24/16C04B2103/302C04B2103/0068Y02W30/91
Inventor 陈起群陈瑜刘嘉伟叶会基
Owner 广州市粤晟混凝土有限公司
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