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High-strength concrete for civil engineering and manufacturing method thereof

A technology of civil engineering and manufacturing method, which is applied in the field of concrete to achieve the effects of good friction resistance, changing hydrophilic properties and strong hydrophobicity

Inactive Publication Date: 2022-02-08
怀化大众混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a high-strength concrete for civil engineering and its production method, which can effectively solve the problem that the background technology does not fundamentally change the hydrophilic property of concrete

Method used

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  • High-strength concrete for civil engineering and manufacturing method thereof
  • High-strength concrete for civil engineering and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A high-strength concrete for civil engineering, including the following raw materials: 500 parts of cement, 225 parts of water, 500 parts of fine sand, 2.0 parts of fluorosilane, 2 parts of water reducing agent, 400 parts of fly ash, and 600 parts of fine aggregate parts, 800 parts of coarse aggregate.

[0029] A method for making high-strength concrete for civil engineering: comprising the steps of:

[0030] S1. Weigh 500 parts of P.O42.5 ordinary Portland concrete and 500 parts of fine sand screened through a 60-mesh fine sieve, and mix them uniformly in the container, then add 225 parts of tap water for mixing in the container, and then Stir it evenly to form concrete slurry, then add 2 parts of water reducer, 400 parts of fly ash, 600 parts of fine aggregate, and 800 parts of coarse aggregate to the concrete slurry, and stir it evenly;

[0031] S2. Add fluorosilane to the concrete slurry and place it under a vertical mixer for stirring, the stirring speed is 250r / m...

Embodiment 2

[0034] The difference between Example 2 and Example 1 is that the weight fractions of each component are different, 600 parts of cement, 270 parts of water, 600 parts of fine sand, 2.5 parts of fluorosilane, 5 parts of water reducing agent, 600 parts of fly ash, 800 parts of fine aggregate and 1000 parts of coarse aggregate.

Embodiment 3

[0036] The difference between Example 3 and Example 1 is that each component is added in different weight fractions, 560 parts of cement, 252 parts of water, 560 parts of fine sand, 3 parts of fluorosilane, 4 parts of water reducer, 500 parts of fly ash, 700 parts of fine aggregate and 900 parts of coarse aggregate.

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Abstract

The invention discloses high-strength concrete for civil engineering and a manufacturing method thereof, and relates to the technical field of concrete. The high-strength concrete is prepared from the following raw materials in parts by weight: 500-600 parts of cement, 225-270 parts of water, 500-600 parts of fine sand, 2-4 parts of a low-surface-energy modifier, 2-5 parts of a water reducing agent, 400-600 parts of fly ash, 600-800 parts of fine aggregate and 800-1000 parts of coarse aggregate. The preparation method comprises the following steps: pretreating the raw materials, adding the low-surface-energy modifier, and forming the concrete. According to the high-strength concrete for civil engineering and the preparation method of the high-strength concrete, fluorosilane is added into the concrete, so that the silane is extremely easy to generate a rapid hydrolysis reaction after encountering water, a siloxane group Si-OC2H5 in the silane reacts to generate a silanol group Si-OH, then the generated silanol group is extremely easy to generate a dehydration condensation reaction with a hydroxyl group on a solid surface, a layer of covalent bond combined mono-molecular film is formed on the solid surface, so that the solid surface energy is effectively reduced, and the hydrophilic property of the concrete is changed.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a high-strength concrete for civil engineering and a manufacturing method thereof. Background technique [0002] Ordinary concrete refers to the artificial stone made of cement as the main cementitious material, mixed with water, sand, stones, chemical admixtures and mineral admixtures when necessary, mixed in an appropriate proportion, and uniformly stirred, compacted and cured. , with excellent properties such as easy pouring, impact resistance and wear resistance. [0003] At present, cement with strong anti-corrosion ability is used to reduce the penetration rate of water by increasing the density of concrete, but it only slows down the penetration of water in the environment to a certain extent. Chloride ions, sulfates, etc. will still penetrate into the interior of the concrete with water and cause concrete damage. Corrosion damage; Concrete surface coating protection is ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20C04B111/27
CPCC04B28/04C04B2111/27C04B2111/20C04B14/06C04B2103/302C04B18/08C04B24/42C04B14/00C04B20/0076
Inventor 王伟覃文吴可永
Owner 怀化大众混凝土有限公司
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