Fly ash surface modifying material and using method thereof

Abstract

The invention provides a fly ash surface modifying material and a using method thereof. The fly ash surface modifying material is prepared with a surfactant commonly used as a concrete admixture and an air entraining agent. The fly ash surface modifying material is prepared by dissolving the surfactant and the air entraining agent in water to prepare a modifying material water solution, forming a modifying material atomized agent through an atomizer, utilizing compressed air to feed the modifying material atomized agent into a fly ash bin from the bottom of the fly ash bin to be fully mixed with fly ash so as to enable carbon particles in the fly ash to pre-adsorb the surface modifying material. Microporous surfaces of the carbon particles are blocked, so that adsorption effect, on a water reducing agent, of the fly ash surface modifying material when the fly ash is used for concrete is reduced, and fluidity of the concrete is improved; the modifying material adhered on the surfaces of other spherical particles of the fly ash can play a role in lubricating, so that fluidity of fly ash concrete is further improved; the surface modifying material is extremely low in consumption, and a gas arch breaking device originally in the fly ash bin can be utilized to complete surface modification of the fly ash, so that the fly ash surface modifying material and the using method are low in cost.

Description

Technical field [0001] The invention relates to a fly ash surface modification material and a use method thereof. Background technique [0002] Fly ash has been widely used in concrete, and its effect can not only reduce the cost of concrete materials, but also improve the pumpability of concrete. Fly ash contains a large number of glass beads, which can improve the fluidity of concrete and increase the lubrication of concrete and pump pipes through the "ball effect", reducing pumping resistance and wear on the pump pipes. However, because fly ash contains unburned carbon particles, it has strong adsorption of concrete water-reducing agent, which can significantly reduce the functional effect of water-reducing agent. Therefore, under the background of the widespread use of water-reducing agents in concrete production, the effect of fly ash in improving the fluidity of concrete has been severely weakened. [0003] Regarding the adverse effects of carbon in fly ash on the fluidity ...

AI Technical Summary

Problems solved by technology

[0003] Regarding the adverse effect of carbon in fly ash on the fluidity of concrete, there is no effective solution at present. In actual engineering, we can only use more water reducing agents than actually needed, resulting in waste and increasing the cost of concrete.

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