C30 grade steel-doped slag recycled aggregate self compacting concrete and preparation method thereof

Abstract

The invention discloses C30 grade steel-doped slag recycled aggregate self compacting concrete comprising the following raw materials by weight: 1 parts of water, 3.089 parts of natural coarse aggregate, 1.322 parts of recycled coarse aggregate, 3.822 parts of fine aggregate, 1.455-1.689 parts of cement, 0.728-0.970 parts of steel slag, 0.609 parts of fly ash, 0.064 parts of supplementary water, and 0.00495-0.0124 parts of an additive, and the water / cement ratio of the self compacting concrete is 0.33. The C30 grade steel-doped slag recycled aggregate self compacting concrete has good fluidity, filling property, and segregation resistance, the gradually loss and the strength both meet requirements related to construction, the C30 grade steel-doped slag recycled aggregate self compacting concrete is simple in preparation method, production cost of the self compacting concrete with same ratio and same strength is reduced, the steel slag and building garbage disposal problem can be solved, the pressure of resource depletion can be alleviated, and the C30 grade steel-doped slag recycled aggregate self compacting concrete is green, environmentally friendly, and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a C30 grade self-compacting concrete mixed with steel slag recycled aggregate and a preparation method thereof. Background technique [0002] Self-compacting concrete (Self Compacting Concrete or Self-Consolidating Concrete referred to as SCC) refers to relying on self-gravity without additional mechanical vibration force, it can have sufficient flow and deformation capacity, even if there are dense steel bars, it can fill the formwork space and Form dense and uniform concrete. The preparation of self-compacting concrete generally reduces the yield stress of the concrete enough to be overcome by the shear stress generated by its own weight through the selection and matching of admixtures, cementitious materials, coarse and fine aggregates, and careful mix ratio design, so that the fluidity of the concrete increases. At the same time, it has enough plastic viscosity to...

AI Technical Summary

Problems solved by technology

At present, there is little research on the application of steel slag and recycled coarse aggregate dual solid waste to self-compacting concrete. Self-compacting concrete is a kind of high-performance concrete different from ordinary concrete. It has high fluidity and does not segregate during the pouring process. , non-bleeding, concrete that can be filled with formwork and wrapped steel bars without mechanical vibration force, and the existing technology for preparing recycled concrete and steel slag concrete cannot solve the current situation of labor shortage

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