Anti-crack concrete and preparation method thereof

A concrete and uniform mixing technology, which is applied in the field of concrete, can solve the problems of crack-resistant concrete limitations, achieve the effects of improving crack resistance, alkali resistance, and prolonging the time of cracks

Active Publication Date: 2020-12-04
仁寿县陵州预拌商品混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after testing, it was found that cracks appeared on the surface of the crack-resistant concrete made of the above-mentioned raw materials after 60 days of curing, which limited the application of crack-resistant concrete. Therefore, it is necessary to provide a Crack Resistant Concrete

Method used

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  • Anti-crack concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A kind of anti-crack concrete, its preparation method is as follows:

[0075] Add the silane coupling agent KH550 into the 15wt% polyethylene glycol aqueous solution according to the ratio in Table 1, stir evenly to obtain the soaking solution, then add the cellulose fiber into the soaking solution, soak for 1.5h, take it out, and dry it to obtain the pre-modified Sexual cellulose fibers;

[0076] Uniformly mixing pre-modified cellulose fibers, nano-boron fibers and nano-ammonium bicarbonate to obtain a mixture, and performing ball milling modification on the mixture, the ball milling speed is 450rad / min, and the ball milling time is 45min, to obtain modified fibers;

[0077] Mix cement and fly ash evenly to obtain cementitious material;

[0078] Coarse aggregate, fine aggregate and modified fiber are uniformly mixed to obtain aggregate; in this embodiment;

[0079] Mix the water reducer and water evenly to obtain the water reducer solution;

[0080] The cementitious...

Embodiment 2

[0085] A kind of anti-crack concrete, its preparation method is as follows:

[0086] Add the silane coupling agent KH560 into the 5wt% polyethylene glycol aqueous solution according to the ratio in Table 1, stir evenly to obtain the soaking solution, then add the cellulose fiber into the soaking solution, soak for 2 hours, take it out, and dry it to obtain the pre-modification Cellulose fibers;

[0087] Uniformly mixing pre-modified cellulose fibers, nano-boron fibers and nano-ammonium bicarbonate to obtain a mixture, and performing ball milling modification on the mixture, the ball milling speed is 320rad / min, and the ball milling time is 60min, to obtain modified fibers;

[0088] Mix cement and fly ash evenly to obtain cementitious material;

[0089] Coarse aggregate, fine aggregate and modified fiber are uniformly mixed to obtain aggregate; in this embodiment;

[0090] Mix the water reducer and water evenly to obtain the water reducer solution;

[0091] The cementitious ...

Embodiment 3

[0096] A kind of anti-crack concrete, its preparation method is as follows:

[0097] Add the silane coupling agent KH570 into the 25wt% polyethylene glycol aqueous solution according to the ratio in Table 1, stir evenly to obtain the soaking solution, then add the cellulose fiber into the soaking solution, soak for 1 hour, take it out, and dry it to obtain the pre-modification Cellulose fibers;

[0098] Uniformly mixing pre-modified cellulose fibers, nano-boron fibers and nano-ammonium bicarbonate to obtain a mixture, and performing ball milling modification on the mixture, the ball milling speed is 560rad / min, and the ball milling time is 30min, to obtain modified fibers;

[0099] Mix cement and fly ash evenly to obtain cementitious material;

[0100] Coarse aggregate, fine aggregate and modified fiber are uniformly mixed to obtain aggregate; in this embodiment;

[0101] Mix the water reducer and water evenly to obtain the water reducer solution;

[0102] The cementitious ...

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Abstract

The invention relates to the field of concrete, and particularly discloses anti-crack concrete and a preparation method thereof. The anti-crack concrete is prepared from cement, fly ash, coarse aggregate, fine aggregate, a water reducing agent, nano boron fibers, cellulose fibers, nano ammonium bicarbonate, a polyethylene glycol aqueous solution, a silane coupling agent and water. The preparationmethod comprises the following steps: preparing pre-modified cellulose fibers; uniformly mixing the pre-modified cellulose fibers, nano boron fibers and nano ammonium bicarbonate, and performing ball-milling modification to obtain modified fibers; mixing cement and fly ash to prepare a cementing material; mixing the coarse aggregate, the fine aggregate and the modified fibers to obtain aggregate;mixing a water reducing agent with water to obtain a water reducing agent solution; and uniformly mixing the cementing material, the aggregate and the water reducing agent solution to obtain the anti-crack concrete. The anti-crack concrete disclosed by the invention can be used as a building material and has the advantage of good anti-crack performance.

Description

technical field [0001] The application relates to the field of concrete, more specifically, it relates to a crack-resistant concrete and a preparation method thereof. Background technique [0002] With the increase of our country's investment in infrastructure, the application of concrete is becoming more and more extensive. Among them, concrete refers to cement, water, sand, stones, mineral admixtures or water reducing agents, etc., which are mixed in appropriate proportions, and artificial stone materials are formed by uniform mixing, compact molding and curing hardening. [0003] At present, according to the different properties of concrete, concrete can be divided into high-strength concrete, impermeable concrete, and crack-resistant concrete. Among them, crack-resistant concrete refers to concrete with better resistance to drying shrinkage deformation or temperature deformation, which is a hot research direction at present. The reason is that cracks in the concrete ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/38C04B16/06C04B22/10C04B111/34
CPCC04B28/00C04B16/0675C04B14/38C04B22/10C04B2111/343C04B2201/50C04B2111/00008C04B18/08C04B18/12C04B14/068C04B2103/302C04B24/32C04B24/42C04B22/002
Inventor 肖建红汪霄
Owner 仁寿县陵州预拌商品混凝土有限公司
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