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Sulfate corrosion-resistant concrete and production method thereof

A technology for resisting sulfate and concrete is applied in the field of building materials to achieve the effects of simple production, simple preparation, and cost reduction.

Inactive Publication Date: 2013-04-10
SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the existing sulfate-resistant concrete, to provide a novel sulfate-resistant concrete and its production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In the present embodiment, the sulfate-resistant concrete includes the following components:

[0052] Component Cubic dosage kg / m 3

[0053] cement 360

[0054] Slag Powder 50

[0055] Fly Ash 50

[0056] stone powder 30

[0057] Fine aggregate 690

[0058] Coarse aggregate 1000

[0059] Superplasticizer 3.0

[0060] water 140

[0061] The above-mentioned cement adopts ordinary Portland cement whose strength grade is P.O42.5, and the slag powder is S95 slag powder. For natural medium sand with less than 1.0% and less than 0.5% mud content, the coarse aggregate shall be crushed stone with a particle size less than 25mm. The water reducer is an admixture, and the water reducer is a polycarboxylate water reducer produced by Meister, the model is SP8, and the accelerator is produced by Meister, and the model is POZZUTEC20+.

[0062] The stone powder has a fineness of less than 0.15mm and its main chemical component is calcium carbonate. Stone powder can improve t...

Embodiment 2

[0065] The sulfate-resistant concrete in the present embodiment comprises following composition:

[0066] Component Cubic dosage kg / m 3

[0067] Cement 400

[0068] Slag Powder 80

[0069] Fly Ash 80

[0070] stone powder 40

[0071] Fine aggregate 760

[0072] Coarse aggregate 1080

[0073] Superplasticizer 3.5

[0074] water 160;

[0075] Stone powder is finer than 0.15mm, and its main chemical composition is calcium carbonate.

[0076] The strength grade of the above cement is P.O42.5 ordinary Portland cement, the slag powder is S95 slag powder, the fly ash is Class II ash, and the fine aggregate has a fineness modulus greater than 2.4 and a mud content of For natural medium sand with less than 1.0% and less than 0.5% mud content, the coarse aggregate shall be crushed stone with a particle size less than 25mm. The water reducer is an admixture, and the water reducer is a polycarboxylate water reducer produced by Meister, the model is SP8, and the accelerator is pr...

Embodiment 3

[0079] The sulfate-resistant concrete in the present embodiment comprises following composition:

[0080] Component Cubic dosage kg / m 3

[0081] Cement 450

[0082] Slag Powder 100

[0083] Fly Ash 100

[0084] stone powder 50

[0085] Fine aggregate 760

[0086] Coarse aggregate 1080

[0087] Superplasticizer 4.0

[0088] water 160;

[0089] Stone powder is finer than 0.15mm, and its main chemical composition is calcium carbonate.

[0090] The strength grade of the above cement is P.O42.5 ordinary Portland cement, the slag powder is S95 slag powder, the fly ash is Class II ash, and the fine aggregate has a fineness modulus greater than 2.4 and a mud content of For natural medium sand with less than 1.0% and less than 0.5% mud content, the coarse aggregate shall be crushed stone with a particle size less than 25mm. The water reducer is an admixture, and the water reducer is a polycarboxylate water reducer produced by Meister, the model is SP8, and the accelerator is ...

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Abstract

The invention relates to novel sulfate corrosion-resistant concrete. The sulfate corrosion-resistant concrete comprises the following components according to cubic amount kg / m<3>: 360-450 kg / m<3> of cement, 50-100 kg / m<3> of slag powder, 50-100 kg / m<3> of coal ash, 30-50 kg / m<3> of stone powder, 690-760 kg / m<3> of fine aggregate, 1000-1080 kg / m<3> of coarse aggregate, 3.0-4.2 kg / m<3> of water reducing agent and 140-160 kg / m<3> of water. After 150 times of wet and dry cycles, the compressive strength and the corrosion-resistant coefficient of the sulfate corrosion-resistant concrete are more than 90% and the appearance of the sulfate corrosion-resistant concrete has no significant change; and working requirements on the production process, long-time transportation, and pumping of premixed concrete and the like can be met.

Description

technical field [0001] The invention relates to building materials, in particular to a sulfate corrosion-resistant concrete. Background technique [0002] Among the factors that affect the durability of concrete, sulfate corrosion damage has attracted more attention from concrete scientists and is considered to be one of the four major factors that cause the failure of concrete materials. Sulfate erosion is also the most complex and harmful environmental water erosion. Sulfate ions in the environment penetrate into the interior of the concrete and react with hydration products, resulting in expansion, cracking, peeling, etc., thereby reducing and losing the strength and viscosity of the concrete. How to prevent and alleviate the erosion and damage of sulfate to concrete has always been an important content in the study of concrete durability. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies of the existing sulfate cor...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B22/10C04B103/61
Inventor 吴德龙冯波卞成辉陈建大李晓庭宋伟吴慧华
Owner SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD
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