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Corrosion-resistant high-performance concrete and preparation method thereof

A high-performance concrete and corrosion-resistant technology, applied in the field of building materials, can solve problems such as inevitable corrosion, reduced strength, and shortened service life, so as to hinder the formation of hydration products, improve corrosion resistance, and delay hydration time Effect

Inactive Publication Date: 2021-03-16
王文杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, concrete is essentially a heterogeneous porous material. Under the erosion of carbon dioxide, water, chloride ions, sulfate and other media, it is inevitably corroded by external factors, which reduces the durability and strength of concrete structures. , thus causing local damage and collapse of the building, and greatly shortening the service life. In order to solve the above problems, those skilled in the art have proposed a corrosion-resistant high-performance concrete and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A corrosion-resistant high-performance concrete, the raw materials of which specifically include 50 parts by weight of cement, 20 parts of fine aggregates, 15 parts of coarse aggregates, 10 parts of ground fly ash, 15 parts of slag, 5 parts of silica fume, admixture 20 parts of raw materials, 6 parts of asbestos fibers and 0.6 parts of composite water reducing agent;

[0034] The corrosion-resistant high-performance concrete is prepared by the following method:

[0035]Step 1. Add water to the composite water reducer, stir evenly, then add the admixture, stir evenly, and obtain the mixture a;

[0036] Step 2: Put cement, fine aggregate, coarse aggregate, pulverized fly ash, slag, silica fume and asbestos fiber into the mixer together, add water to the mixer, stir evenly, then add water and mixture a to the mixer , and stir evenly to obtain corrosion-resistant high-performance concrete.

[0037] The cement is sulfate-resistant cement, the fine aggregate is natural wash...

Embodiment 2

[0050] A kind of corrosion-resistant high performance concrete, its raw material specifically comprises cement 80 parts by weight, fine aggregate 40 parts, coarse aggregate 30 parts, pulverized fly ash 16 parts, slag 25 parts, silica fume 10 parts, mixing 40 parts of raw materials, 10 parts of asbestos fiber and 0.9 parts of composite superplasticizer;

[0051] The corrosion-resistant high-performance concrete is prepared by the following method:

[0052] Step 1. Add water to the composite water reducer, stir evenly, then add the admixture, stir evenly, and obtain the mixture a;

[0053] Step 2: Put cement, fine aggregate, coarse aggregate, pulverized fly ash, slag, silica fume and asbestos fiber into the mixer together, add water to the mixer, stir evenly, then add water and mixture a to the mixer , and stir evenly to obtain corrosion-resistant high-performance concrete.

[0054] The cement is sulfate-resistant cement, the fine aggregate is natural washed sand with a finene...

Embodiment 3

[0067] A kind of corrosion-resistant high-performance concrete, its raw material specifically comprises 50 parts of cement, 40 parts of fine aggregate, 15 parts of coarse aggregate, 16 parts of finely ground fly ash, 15 parts of slag, 10 parts of silica fume, blending 20 parts of raw materials, 10 parts of asbestos fiber and 0.6 parts of composite superplasticizer;

[0068] The corrosion-resistant high-performance concrete is prepared by the following method:

[0069] Step 1. Add water to the composite water reducer, stir evenly, then add the admixture, stir evenly, and obtain the mixture a;

[0070] Step 2: Put cement, fine aggregate, coarse aggregate, pulverized fly ash, slag, silica fume and asbestos fiber into the mixer together, add water to the mixer, stir evenly, then add water and mixture a to the mixer , and stir evenly to obtain corrosion-resistant high-performance concrete.

[0071] The cement is sulfate-resistant cement, the fine aggregate is natural washed sand ...

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Abstract

The invention discloses corrosion-resistant high-performance concrete and a preparation method thereof. The corrosion-resistant high-performance concrete is prepared from the following raw materials in parts by weight: 50-80 parts of cement, 20-40 parts of fine aggregate, 15-30 parts of coarse aggregate, 10-16 parts of ground fly ash, 15-25 parts of slag, 5-10 parts of silica fume, 20-40 parts ofadmixture, 6-10 parts of asbestos fiber and 0.6-0.9 part of composite water reducing agent. According to the preparation method of the corrosion-resistant high-performance concrete, ground fly ash issubjected to secondary hydration with Ca (OH) 2 generated by cement hydration under the dual action of sulfate and an alkali activator, hydrated calcium silicate with a low calcium-silicon ratio and compact sulfate which are more stable under a low-alkali condition are generated, and pores in the concrete are filled with the hydrated calcium silicate and the compact sulfate, The hydrated calcium silicate and the compact sulfate become effective components of the concrete structure, and the permeability of the concrete is reduced, so that SO4<2-> ions entering the concrete are reduced, and thesulfate corrosion resistance of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a corrosion-resistant high-performance concrete and a preparation method thereof. Background technique [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. The term concrete usually refers to using cement as cementitious material, sand and stone as aggregate; cement concrete mixed with water in a certain proportion and stirred, also known as ordinary concrete, which is widely used in civil engineering. Concrete has been widely used in the field of civil engineering due to its excellent physical and mechanical properties, and is currently the most widely used building material. [0003] However, concrete is essentially a non-uniform porous material. Under the erosion of carbon dioxide, water, chloride ions, sulfate and other media, it is inevitably affected by external factors a...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/00C04B2111/2015C04B2201/50C04B14/06C04B14/02C04B14/062C04B14/28C04B18/08C04B18/146C04B18/141C04B14/40C04B2103/302
Inventor 王文杰
Owner 王文杰
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