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A kind of sulfate corrosion resistant concrete and its preparation method

An anti-sulfate and concrete technology, applied in the field of concrete, can solve the problems of reducing the strength and viscosity of concrete, affecting the durability of concrete, cracking, spalling, etc. Effect

Active Publication Date: 2021-12-21
BEIJING TAIPINGYANG CEMENT PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Sulfate corrosion is mainly caused by sulfate ions in the environment penetrating into the concrete and reacting with hydration products, resulting in expansion, cracking, spalling, etc., which reduces and loses the strength and viscosity of concrete, thus affecting the durability of concrete

Method used

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  • A kind of sulfate corrosion resistant concrete and its preparation method

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Comparison scheme
Effect test

Embodiment 1

[0046] A sulfate-resistant concrete, comprising 240 parts by weight of cement, 150 parts of water, 70 parts of fly ash, 80 parts of mineral powder, 660 parts of natural sand, 1200 parts of crushed stone, 50 parts of epoxy resin, silicon 10 parts of ash, 7 parts of admixture, 1 part of barium hydroxide, 0.2 parts of sodium citrate, 2 parts of steel fiber;

[0047] Among them, the admixture contains the following components: polycarboxylic acid, silicone oil and rosin soap, the weight ratio of polycarboxylic acid, silicone oil and rosin soap is 1.0:1.2:1.8, that is, 1.75 parts of polycarboxylic acid, 2.1 parts of silicone oil , 3.15 parts of rosin soap.

[0048] The preparation method of above-mentioned sulfate-resistant concrete is as follows:

[0049] Put the above-mentioned other components except water into a mixer and mix them, then add water into the mixer, and stir for 10 minutes to prepare the above-mentioned sulfate-resistant concrete.

Embodiment 2

[0051] A sulfate-resistant concrete, comprising 300 parts by weight of cement, 170 parts of water, 80 parts of fly ash, 100 parts of mineral powder, 710 parts of natural sand, 1350 parts of crushed stone, 60 parts of epoxy resin, silicon 15 parts of ash, 8 parts of admixture, 2.5 parts of barium hydroxide, 0.35 parts of sodium citrate, 6 parts of steel fiber;

[0052] Wherein, the admixture contains the following components: polycarboxylic acid, silicone oil and rosin soap, the weight ratio of polycarboxylic acid, silicone oil and rosin soap is 1.2:1.2:2.0, that is, 2.18 parts of polycarboxylic acid, 2.18 parts of silicone oil , 3.64 parts of rosin soap.

[0053] The preparation method of above-mentioned sulfate-resistant concrete is as follows:

[0054] Put the above-mentioned other components except water into a mixer and mix them, then add water into the mixer, and stir for 15 minutes to prepare the above-mentioned sulfate-resistant concrete.

Embodiment 3

[0056] A sulfate-resistant concrete, comprising 360 parts by weight of cement, 190 parts of water, 90 parts of fly ash, 120 parts of mineral powder, 760 parts of natural sand, 1500 parts of crushed stone, 70 parts of epoxy resin, silicon 20 parts of ash, 9 parts of admixture, 4 parts of barium hydroxide, 0.5 parts of sodium citrate, 10 parts of steel fiber;

[0057] Among them, the admixture contains the following components: polycarboxylic acid, silicone oil and rosin soap, the weight ratio of polycarboxylic acid, silicone oil and rosin soap is 1.4:1.2:2.2, that is, 2.625 parts of polycarboxylic acid, 2.25 parts of silicone oil , 4.125 parts of rosin soap.

[0058] The preparation method of above-mentioned sulfate-resistant concrete is as follows:

[0059] Put the above-mentioned other components except water into a mixer and mix them, then add water into the mixer, and stir for 20 minutes to prepare the above-mentioned sulfate-resistant concrete.

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Abstract

The invention discloses a sulfate corrosion-resistant concrete and a preparation method thereof, which belong to the technical field of concrete. The key point of the technical scheme is that, in parts by weight, the raw materials of the sulfate corrosion-resistant concrete include 240-360 parts of cement and 150-190 parts of water. 70-90 parts of fly ash, 80-120 parts of mineral powder, 660-760 parts of fine aggregate, 1200-1500 parts of coarse aggregate, 50-70 parts of epoxy resin, 10-20 parts of silica fume, admixture 7-9 parts, 1-4 parts of barium hydroxide, 0.2-0.5 parts of sodium citrate, 2-10 parts of steel fiber, wherein the admixture contains the following components: polycarboxylic acid, silicone oil and rosin soap, polycarboxylate The weight ratio of acid, silicone oil and rosin soap is (1.0‑1.4):1.2: (1.8‑2.2). The preparation of the above-mentioned sulfate-resistant concrete includes the following steps: stirring and mixing other components except water, then adding water, and stirring for 10-20 minutes to prepare the sulfate-resistant concrete. The sulfate corrosion resistant concrete of the present invention has effects of sulfate corrosion resistance and durability.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a sulfate corrosion-resistant concrete and a preparation method thereof. Background technique [0002] Concrete is an indispensable and important material in today's construction projects. With the construction and development of existing engineering structures in society, concrete has been widely used. However, due to the poor durability of concrete, a large number of engineering structures are repaired or rebuilt after a period of use. The amount of repaired or rebuilt projects is as huge as the amount of new construction, which undoubtedly increases the project cost. Therefore, there are more and more researches on the durability of concrete, and in the research system of concrete durability, sulfate corrosion damage has attracted more attention from concrete science and technology workers, and it is considered to cause the failure of concrete materials. One of the four main factors t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/26
CPCC04B28/04C04B2111/2015C04B2111/26C04B18/08C04B18/141C04B14/06C04B14/02C04B24/281C04B18/146C04B22/064C04B24/06C04B14/48C04B24/24C04B24/42C04B24/34C04B24/04C04B14/024
Inventor 邱永侠
Owner BEIJING TAIPINGYANG CEMENT PROD CO LTD
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