Preparation method of high-strength anti-crack and anti-impact concrete and high-strength anti-crack and anti-impact concrete

A technology of impact resistance and concrete, which is applied in the preparation of high-strength crack-resistant impact-resistant concrete and the field of high-strength crack-resistant impact-resistant concrete. Large and other problems, to achieve the effect of light weight, improved impact resistance and low density

Inactive Publication Date: 2022-04-15
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while satisfying crack resistance, the incorporation of steel fibers may bring other unfavorable factors, for example, the density of steel fibers increases the weight of the structure. In addition, steel fibers are easily corroded in humidity and air, reducing the durability of structural materials.
[0004] Patent 201810455234.3 discloses a concrete prepared by using double-helix fibers. Although the double-helix fibers mixed with it have a crack-resistance enhancement effect compared with traditional fiber concrete, the negative Poisson's ratio of the fiber structure involved cannot be realized. Excellent impact resistance and anti-knock performance

Method used

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  • Preparation method of high-strength anti-crack and anti-impact concrete and high-strength anti-crack and anti-impact concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A high-strength crack-resistant impact-resistant concrete and a preparation method thereof, the steps are as follows:

[0037] (1) Copper slag and slag (all industrial waste slag, copper slag color is gray black, specific surface area is 390m2) by drum dry mill 2 / kg; SiO in slag 2 and Al 2 o 3 The content is respectively 31% by weight and 11% by weight) dry grinding to powder, obtain copper slag powder and slag powder respectively;

[0038] (2) Take the above-mentioned 200 parts by weight of copper slag powder, 100 parts by weight of water, add 0.1 part by weight of water reducing agent, and use a vertical ball mill (rotating speed: 400r / s) to wet grind for 40 minutes to obtain copper slag slurry, which is recorded as slurry A;

[0039] Take the above 100 parts by weight of slag, 100 parts by weight of water, add 0.2 parts by weight of water reducer, and wet mill for 20 minutes to obtain slag powder slurry, which is recorded as slurry B;

[0040] Wherein, the medi...

Embodiment 2

[0048] A high-strength crack-resistant impact-resistant concrete and a preparation method thereof, the steps are as follows:

[0049] (1) Copper slag and slag (all industrial waste slag, copper slag color is gray black, specific surface area is 390m2) by drum dry mill 2 / kg; SiO in slag 2 and Al 2 o 3 The content is respectively 25% by weight and 5% by weight) dry grinding to powdery, obtain copper slag powder and slag powder respectively;

[0050] (2) Take the above-mentioned 190 parts by weight of copper slag powder, 85 parts by weight of water, add 0.2 parts by weight of water reducing agent, and use a vertical ball mill (rotating speed is 350r / s) to wet grind for 35min to obtain copper slag slurry, which is recorded as slurry A;

[0051] Take the above 110 parts by weight of slag, 110 parts by weight of water, add 0.1 part by weight of water reducing agent, and wet mill for 15 minutes to obtain a slurry of mineral powder, which is recorded as slurry B;

[0052] Wherei...

Embodiment 3

[0060] A high-strength crack-resistant impact-resistant concrete and a preparation method thereof, the steps are as follows:

[0061] (1) Copper slag and slag (all industrial waste slag, copper slag color is gray black, specific surface area is 410m 2 / kg; SiO in slag 2 and Al 2 o 3 The content is respectively 35% by weight and 15% by weight) dry grinding to powdery, obtain copper slag powder and slag powder respectively;

[0062] (2) Take the above-mentioned 210 parts by weight of copper slag powder, 105 parts by weight of water, add 0.2 parts by weight of water reducing agent, and use a vertical ball mill (rotating speed of 450r / s) to wet grind for 45min to obtain a copper slag slurry, which is recorded as slurry A;

[0063] Take the above 120 parts by weight of slag, 120 parts by weight of water, add 0.3 parts by weight of water reducer, and wet mill for 25 minutes to obtain a slurry of mineral powder, which is recorded as slurry B;

[0064] Wherein, the median particl...

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Abstract

The invention provides a preparation method of high-strength anti-crack and anti-impact concrete and the high-strength anti-crack and anti-impact concrete prepared by the method. According to the method provided by the invention, industrial solid wastes such as the copper slag and the slag are utilized, so that the consumption of cement is reduced, the economic cost is saved, and meanwhile, natural resources are protected. The wet grinding treatment mode improves the pozzolanic activity of the copper slag and the slag to a greater extent, so that the impact-resistant concrete has higher compressive strength, breaking strength and tensile strength.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of high-strength crack-resistant and impact-resistant concrete and the high-strength crack-resistant and impact-resistant concrete prepared by the method. Background technique [0002] Because of the wide application of concrete materials, more and more concrete structures are subject to frequent or occasional shock loads, such as airport runways being impacted by aircraft landings, marine structures being impacted by waves, protective structures and earthquake zones subjected to bomb impacts Civil buildings where strong earthquakes may occur. However, the limited deformation and poor energy absorption capacity of conventional concrete pose specific challenges for the safety of concrete structures under impact loading conditions. Although cementitious materials have high compressive strength, they also have brittle fracture characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B7/147C04B7/153C04B14/48C04B18/22C04B111/34
CPCY02P40/10Y02W30/91
Inventor 王迎斌杨杰苏英贺行洋李阳徐立李齐刘文志胡轶杨进陈威陈顺
Owner HUBEI UNIV OF TECH
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