Fly ash concrete carbon adsorption inhibitor and application thereof

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...

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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.

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