Fly ash concrete carbon adsorption inhibitor and application thereof

A carbon adsorption inhibitor and concrete technology, applied in the field of building materials, can solve the problems of increased dosage, decreased concrete strength, poor concrete workability, etc., and achieves the effects of strong bubble stability, uniform bubble size and small coefficient of variation

Inactive Publication Date: 2012-09-19
JIANGSU MINGHE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the other hand, because the fly ash contains unburned carbon particles, it has a strong adsorption effect on the air-entraining agent, resulting in an increase in the dosage of the air-entraining agent or an increase in the loss of air content over time during the use of the air-entraining agent. It has caused certain difficulties to the construction of the project, and also brought hidden dangers to the durability of concrete.
Due to the difference in loss on ignition and fineness of fly ash, its adsorption to air-entraining agent is different. If the air-entraining agent is not enough, the workability of concrete is poor, and it is difficult to construct. If the air-entraining agent is too large, the concrete strength will be greatly reduced.
In addition, the unburned carbon particles in the fly ash have an adsorption effect on the water reducing agent, which also increases the water consumption of concrete and reduces the strength of concrete.

Method used

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  • Fly ash concrete carbon adsorption inhibitor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The mixing ratio of fly ash concrete carbon adsorption inhibitor is: 7 parts of benzylamine, 26 parts of sodium diisopropylnaphthalene sulfonate, 38 parts of ethylene glycol phenyl ether, 12 parts of lithium o-hydroxybenzoate, acrylic acid- 6 parts of 2-acrylamide-2-methylpropanesulfonic acid copolymer (average molecular weight: 1000), 5 parts of sodium ethylenediamine tetramethylene phosphonate, 6 parts of γ-glycidyl etheroxypropyl trimethoxysilane , the dosage is 0.008% of the total weight of the gelling material.

[0022] The application of the above fly ash concrete carbon adsorption inhibitor in the preparation of fly ash concrete is as follows: the above inhibitor is sprayed on the surface of the fly ash by spraying, and then mixed with other components of the concrete for use after stirring evenly.

[0023] Fly ash concrete is composed of fly ash, cement, other mineral admixtures, water, chemical admixtures, coarse aggregate, and fine aggregate. Th...

Embodiment 2

[0028] Embodiment 2: basically the same as Example 1, the difference is that the fly ash concrete carbon adsorption inhibitor mix ratio and dosage are as follows: 5 parts in benzylamine, 12 parts in sodium diisopropylnaphthalene sulfonate, ethylene disulfonate 50 parts of alcohol phenyl ether, 14 parts of lithium o-hydroxybenzoate, 6 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (average molecular weight 1200), 3 parts of sodium ethylenediamine tetramethylene phosphonate 10 parts, γ-glycidyl etheroxypropyl trimethoxysilane.

[0029] The amount of carbon adsorption inhibitor in fly ash concrete is 0.005% of the total amount of cementitious materials.

Embodiment 3

[0030] Embodiment 3: substantially the same as Example 1, the difference is that the fly ash concrete carbon adsorption inhibitor compounding ratio and dosage are as follows: 7 parts of benzylamine, 26 parts of sodium diisopropylnaphthalene sulfonate, ethylene glycol 38 parts of alcohol phenyl ether, 12 parts of lithium o-hydroxybenzoate, 6 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (average molecular weight 1500), 5 parts of sodium ethylenediamine tetramethylene phosphonate 6 parts, γ-glycidyl etheroxypropyl trimethoxysilane 6 parts.

[0031] The amount of carbon adsorption inhibitor in fly ash concrete is 0.05% of the total amount of cementitious materials.

[0032] Its performance evaluation index is carried out in accordance with "Test Method for Performance of Ordinary Concrete Mixture" (GB / T 50080-2002) and "Test Method for Ordinary Concrete Mechanics" (GB / T 50081-2002), and its specific performance index is shown in Table 1 .

[0033]

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PUM

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Abstract

The invention discloses a fly ash concrete carbon adsorption inhibitor comprising the following components by weight: 5-10 parts of aromatic amino micromolecule, 12-26 parts of aromatic sodium sulfonate, 38-50 parts of alcohol derivative, 8-14 parts of neighboring hydroxybenzoic acid salt, 3-8 parts of crylic acid-2-acrylamide-2-methyl propanesulfonic acid copolymer, 3-10 parts of ethanediamine tetramethylene phosphonate and 6-10 parts of organosilan. The fly ash concrete carbon adsorption inhibitor inhibits adsorption of an additive by carbon particles in the fly ash, improves the performance stability and durability of concrete, is favorably adapted to various additives, has favorable inhibitive ability to the fly ash concrete carbon adsorption with various mixing amount and quality, and does not influence the performance of the concrete. The inhibitor is small in the mixing amount so that the strength of concrete is improved and the construction is convenient.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a fly ash concrete carbon adsorption inhibitor and application thereof. Background technique [0002] Fly ash is mainly solid waste discharged from coal-fired thermal power plants. Among them, the solid particles discharged from the flue and mainly collected by the dust collector are fly ash. With its spherical particle shape, fly ash particles are recognized as having the ability to improve the workability of concrete and increase the long-term strength through pozzolanic reactions, reduce the water consumption of concrete, reduce the amount of cement in concrete, and reduce the hydration of cement. Practical value such as the heat generated by the reaction. [0003] Among them, the concrete containing fly ash mineral admixture is called fly ash concrete. In recent years, with the implementation of national energy-saving emission reduction and green environmental protection p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/20
Inventor 李保亮江峰臧军焦凯邓明超
Owner JIANGSU MINGHE GRP
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