Preparation method and application of fly ash slurry material based on wet grinding process

Abstract

The invention provides a preparation method and application of a fly ash slurry material based on a wet grinding process. The fly ash slurry material is characterized in that the fly ash slurry material is prepared from, by mass, 50-60% of fly ash, 1-3% of a dispersing agent, 0.2-0.4% of a stabilizer, 5-10% of cement, and the balance of water. The fly ash slurry material is prepared through the wet grinding process. The fly ash slurry material provided by the invention can equivalently replace 20-30% of cement in a cement-based material. Compared with the original cement, the fly ash slurry material disclosed by the invention has higher hydration degree and extremely high activity, and when the cement is partially replaced, the early strength can be obviously improved, and the grading can be optimized, so that the later strength is also improved to a certain extent. The preparation process is simple, the preparation process is easy to control, the energy consumption is low, the used raw materials are environment-friendly, harmful substances are not introduced and discharged, and the preparation method is easy to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of cementitious materials, in particular to a method for preparing a fly ash slurry material based on a wet grinding process. The fly ash slurry material is used in the field of cement-based materials to replace part of the cement. Background technique [0002] Cement production is an energy-intensive process. Cement production not only consumes a lot of non-renewable energy, but also releases a lot of CO 2 ,polluted environment. In response to the national policy of sustainable, low-carbon, and environment-friendly development, using fly ash as an admixture for the production of cement and concrete industries is an important solid waste utilization method for dealing with fly ash. For example, fly ash cement (full name fly ash Portland cement) currently on the market is a hydraulic cementitious material made by grinding together Portland cement clinker, fly ash, and an appropriate amount of gypsum. Usuall...

AI Technical Summary

Problems solved by technology

The fly ash slurry material can destroy the vitreous structure of fly ash, increase its fineness, increase its specific surface area, induce rapid hydration of fly ash, promote its pozzolanic effect, and improve the concrete without losing the strength of cement concrete. Reduce the amount of fly ash and reduce the amount of cement, so as to achieve energy saving and emission reduction and solve the problems of low early strength and low effective utilization rate of existing fly ash-cement concrete