Design method of steel fiber self-compacting concrete mix ratio based on rheological properties of mortar

Abstract

The invention discloses a mixing ratio design method of steel fiber self-compacting concrete based on the rheological characteristics of mortar, which includes establishing a steel fiber concrete expansion degree SF prediction model; The mix ratio of self-compacting concrete mortar; the yield stress and plastic viscosity of the mortar are tested by the rotating ball method, and the measured yield stress of the mortar is substituted into the steel fiber concrete expansion degree SF measurement model to predict the expansion degree of the steel fiber concrete; the design accuracy is higher Higher, closer to reality, can better complete the optimization and performance control of the components in the material selection process, the overall design steps and ideas are clear, the operation is simple and reasonable, avoiding the blindness, It reduces the time, manpower, material and energy waste caused by repeated trial and adjustment, so it has better operability and practicability.

Description

technical field [0001] The invention relates to the technical field of construction engineering concrete, in particular to a method for designing the mixing ratio of steel fiber self-compacting concrete based on the rheological properties of mortar. Background technique [0002] Steel fiber self-compacting concrete is a composite material with high fluidity. It relies on its own gravity to fill the formwork gap without vibration. After hardening, steel fiber self-compacting concrete can be reinforced by steel fibers. The toughness effect improves the strength of concrete, so steel fiber self-compacting concrete has excellent workability and toughness properties. At present, there is no clear regulation on the mix ratio design method of steel fiber self-compacting concrete. In the prior art, there are relatively few studies on the mix ratio design method of steel fiber self-compacting concrete. On the basis of dense concrete, steel fiber is directly mixed, and steel fiber eq...

AI Technical Summary

Problems solved by technology

This method can meet certain parameters of steel fiber, but the replacement of coarse aggregate will change the mechanical properties of concrete

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