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Cement-based reinforcing grouting material with strong acid resistance

A cement-based, grouting material technology, applied in the field of building materials, can solve the problems of low compressive strength, short service life, poor fluidity, etc., and achieve the effect of reducing permeability and enhancing compactness

Inactive Publication Date: 2015-06-03
建研建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the conventional cement-based reinforcement grout is not acid-resistant, the reinforced concrete structure still has the defect of short service life
[0003] The acid-resistant concrete commonly used in engineering structures is water glass, which is generally made of water glass and sodium fluorosilicate as the cement, together with powder and aggregate. This type of material has low compressive strength, poor fluidity, and short setting time. , not suitable for reinforcement of concrete structures with enlarged cross-sectional area

Method used

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  • Cement-based reinforcing grouting material with strong acid resistance
  • Cement-based reinforcing grouting material with strong acid resistance
  • Cement-based reinforcing grouting material with strong acid resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Select 100 kg of PO42.5 Portland cement, 50 kg of Class I fly ash, 20 kg of phenylacrylic acid-resistant rubber powder, 10 kg of naphthalene-based high-efficiency water reducer, 300 kg of machine-made sand, 20 kg of UEA expansion agent, methyl 0.5 kg of cellulose ether.

[0019] Weigh each component according to the above ratio, mix in a forced mixer for 15-20 minutes, and store in dry bags. When in use, add drinking water with 12% of the mass of the mixture and stir. The performance of the grouting material is as follows:

[0020]

Embodiment 2

[0022] Select 100 kg of PO42.5 Portland cement, 35 kg of mineral powder, 25 kg of modified rubber chloroprene acid-resistant rubber powder, 5 kg of polycarboxylate superplasticizer, 260 kg of quartz sand, UEA and nitroso mixed expansion agent 15 kg, 1 kg of hydroxyethyl cellulose ether.

[0023] Weigh each component according to the above ratio, mix in a forced mixer for 15-20 minutes, and store in dry bags. When in use, add drinking water with 10% of the mass of the mixture and stir. The performance of the grouting material is as follows:

[0024]

Embodiment 3

[0026] Select 100 kg of PO42.5 Portland cement, 10 kg of silica fume, 20 kg of fly ash, 30 kg of vinyl acetate-chloroprene rubber copolymer powder, 3 kg of polycarboxylate superplasticizer, 200 kg of gravel, UEA 10 kg of expansion agent, 0.2 kg of hydroxypropyl cellulose ether.

[0027] Weigh each component according to the above ratio, mix in a forced mixer for 15-20 minutes, and store in dry bags. When in use, add drinking water with 10% of the mass of the mixture and stir. The performance of the grouting material is as follows:

[0028]

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Abstract

The invention provides a cement-based reinforcing grouting material with strong acid resistance. The material comprises components in parts by mass as follows: 100 parts of cement, 0-50 parts of an admixture, 20-30 parts of acid-resistant rubber powder, 3-10 parts of a water reducer, 200-300 parts of aggregate, 10-20 parts of an expanding agent and 0-0.5 parts of a water retaining agent, wherein the cement is Portland cement not lower than 42.5 level, the admixture is a mixture formed by mixing silica fume, fly ash and mineral powder in any proportion, the acid-resistant rubber powder is a mixture formed by mixing cinnamic acid, modified neoprene and vinyl acetate-neoprene copolymerized latex powder, the water reducer is a naphthalene water reducer or a polycarboxylate water reducer, the aggregate is machine-made sand, quartz sand or rubble. The material has the strong acid resistance and has advantages of self-compaction, micro-expansion, high early and later strength, construction convenience and the like of the cement-based reinforcing grouting material.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a preparation technology of a cement-based reinforcement grouting material with strong acid resistance. The reinforcement grouting material can be used as concrete structure reinforcement in a strong acid corrosion environment, and can also be used as acid-resistant concrete. Background technique [0002] The concrete structures of some petrochemical and chemical enterprises, such as sewage treatment tanks, beams and columns of factory buildings, pipe corridor columns, etc., are corroded by the acidic waste water and waste gas discharged from the factory, and the concrete protective layer peels off quickly, and the internal steel bars are corroded. Durability Very poor, so it is necessary to expand the cross-sectional area for reinforcement, and the commonly used reinforcement material is cement-based reinforcement grouting material. Because the conventional cement-b...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04
Inventor 邵正明王明远黄莹杨欣华王海龙
Owner 建研建材有限公司
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