Concrete sulfate-corrosion-resistant additive and preparation method thereof

An anti-sulfate and additive technology, applied in the field of civil engineering materials, can solve the problems affecting the later strength and durability of concrete, the effect of preservatives is not very satisfactory, and the workability of fresh concrete is reduced. The effect of improving sulfate attack performance and improving the ability to resist sulfate attack

Active Publication Date: 2015-11-25
海南胜凯建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this preservative basically covers all aspects of concrete durability, however, it is not highly targeted, and there are too many types of constituent materials, and the preparation process is cumbersome
There are also some studies that mineral admixtures such as fly ash, mineral powder and silica fume can be used as anti-corrosion agents for concrete against sulfate corrosion. However, the effect of such anti-corrosion agents is not very satisfactory, and sometime

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A concrete sulfate corrosion resistance additive, each component and its mass percentage are as follows:

[0020] Barium-based modified bentonite: 30%, its specific surface area is 430m 2 / kg, montmorillonite content is 87%; nano-kaolin / metakaolin: 40%, its whiteness is 92%, average particle size is 0.5μm; hydrotalcite powder 20%, its whiteness is 95%, average particle size is 0.5 μm; solid water glass: 10%, its modulus is 3.0.

[0021] A kind of preparation method of concrete anti-sulphate corrosion additive is as follows:

[0022] Mix barium-based modified bentonite, nano-kaolin / metakaolin, hydrotalcite powder and solid water glass according to the above ratio, and grind the mixture in a grinder until the specific surface area of ​​the ground powder reaches 400m 2 / kg or more, then bagged and sealed.

[0023] The performance test of this embodiment is determined according to the requirements and test methods stipulated in "Concrete Anti-Sulfuric Acid Corrosion Anti...

Embodiment 2

[0027] A concrete sulfate corrosion resistance additive, each component and its mass percentage are as follows:

[0028] Barium-based modified bentonite: 40%, its specific surface area is 450m 2 / kg, montmorillonite content is 91%; nano kaolin / metakaolin: 30%, its whiteness is 93%, average particle size is 0.7μm; hydrotalcite powder 20%, its whiteness is 92%, average particle size is 0.7 μm; solid water glass 10%, its modulus is 2.5.

[0029] A kind of preparation method of concrete anti-sulphate corrosion additive is as follows:

[0030] Mix barium-based modified bentonite, nano-kaolin / metakaolin, hydrotalcite powder and solid water glass uniformly according to the above ratio, and grind the mixture in a grinder until the specific surface area of ​​the ground powder reaches 400m 2 / kg or more, then bagged and sealed.

[0031] The performance test of this embodiment is determined according to the requirements and test methods stipulated in "Concrete Anti-Sulfuric Acid Corro...

Embodiment 3

[0035] A concrete sulfate corrosion resistance additive, each component and its mass percentage are as follows:

[0036] Barium-based modified bentonite: 50%, its specific surface area is 480m 2 / kg, montmorillonite content is 93%; nano-kaolin / metakaolin: 20%, its whiteness is 91%, average particle size is 0.5μm; hydrotalcite powder 20%, its whiteness is 95%, average particle size is 0.4 μm; solid water glass 10%, its modulus is 3.5.

[0037] A kind of preparation method of concrete anti-sulphate corrosion additive is as follows:

[0038] Mix barium-based modified bentonite, nano-kaolin / metakaolin, hydrotalcite powder and solid water glass according to the above ratio, and grind the mixture in a grinder until the specific surface area of ​​the ground powder reaches 400m 2 / kg or more, then bagged and sealed.

[0039] The performance test of this embodiment is determined according to the requirements and test methods stipulated in "Concrete Anti-Sulfuric Acid Corrosion Antico...

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Abstract

The invention relates to a concrete sulfate-corrosion-resistant additive and a preparation method thereof, and belongs to the technical field of civil engineering materials. The concrete sulfate-corrosion-resistant additive mainly comprises, by mass, 30-50% of barium-based modified bentonite, 20-40% of nanometer kaolin/metakaolin, 20-30% of water talcum powder and 10-15% of solid water glass. The preparation method includes the steps of evenly mixing barium-based modified bentonite, nanometer kaolin/metakaolin, water talcum powder and solid water glass in proportion, placing the mixture in a grinding machine to be ground till the specific surface area of the ground powder reaches 400 m<2>/kg or above, and conducting bagging and sealing. By means of the concrete sulfate-corrosion-resistant additive and the preparation method, the sulfate corrosion resistance of concrete can be improved, the compressive strength of concrete can be improved, the concrete hole structure and compactness are improved, and the durability of concrete is improved. The prepared additive has the advantages of being long in timeliness, free of toxin and environment pollution, simple in preparation process and low in cost.

Description

technical field [0001] The invention belongs to the technical field of civil engineering materials, and in particular relates to a concrete sulfate corrosion resistance additive and a preparation method thereof. Background technique [0002] Concrete material has become one of the most widely used and used building materials in the world today due to its high compressive strength, good fire resistance, flexible use, and convenient construction, and it plays roles and functions that other materials cannot replace. However, because the concrete itself is not completely dense, there are many capillary channels inside it. When the concrete structure is exposed to the environment and medium containing sulfate, it may be damaged by sulfate attack. Especially in the saline areas in western China and the eastern coastal areas, the sulfate corrosion damage of concrete is the most serious and common, causing a lot of waste to the country's economic construction. Therefore, it is of gr...

Claims

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Application Information

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IPC IPC(8): C04B22/08C04B14/10C04B14/04C04B103/61
Inventor 蒋林华熊传胜郭青湘陶德彪蒋鹏金鸣高海浪
Owner 海南胜凯建材有限公司
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