Class C40 slag-doped recycled aggregate self-compacting concrete and production method thereof

Abstract

The invention discloses class C40 slag-doped recycled aggregate self-compacting concrete and a production method thereof; the Class C40 slag-doped recycled aggregate self-compacting concrete comprises 1 part of water, 3.089 parts of natural coarse aggregate, 1.322 parts of recycled coarse aggregate, 3.822 parts of fine aggregate, 1.941-2.183 parts of cement, 0.2426-0.4851 part of slag, 0.609 part of fly ash, 0.064 part of added water, and 0.00495-0.0124 part of an admixture. The class C40 slag-doped recycled aggregate self-compacting concrete has good mobility, filling performance and segregation resistance, both gradual loss and strength of the concrete meet the related requirements of buildings, the production method is simple, the production cost of self-compacting concrete under same ratio and strength is lowered, the slag and building waste treatment problem is solved, the burden of resource exhaustion is relieved, and the concrete and the production method thereof are green and suitable for industrial production.

Description

Technical field [0001] The invention relates to the technical field of building materials, in particular to a C40-grade steel slag regenerated aggregate self-compacting concrete and a preparation method thereof. Background technique [0002] Self-compacting concrete (Self Compacting Concrete or Self-Consolidating Concrete for short SCC) refers to the fact that it can have sufficient flow and deformation capacity by relying on its own gravity without additional mechanical vibrating force. 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, cementing materials and coarse and fine aggregates and careful design of the mix ratio, so that the fluidity of the concrete is increased. At the same time, it has enough plastic vi...

AI Technical Summary

Problems solved by technology

Although the self-compacting concrete prepared at present meets the construction and strength requirements, the cost is relatively high. Therefore, the dual solid waste of steel slag and recycled coarse aggregate is used instead of cement and natural coarse aggregate to prepare self-compacting concrete, which can reduce the production of self-compacting concrete. cost, and self-compacting concrete is a kind of high-performance concrete different from ordinary concrete. It has high fluidity and does not segregate or bleed during the pouring process. It can be filled with formwork and wrapped steel bars without mechanical vibration force. Concrete, while the existing technologies for preparing recycled concrete and steel slag concrete cannot solve the current situation of labor shortage

Images