Concrete mixing proportion design method capable of fully utilizing performance of each component material

Abstract

The invention discloses a concrete mixing proportion design method capable of fully utilizing performance of each component material, and belongs to the technical field of concrete preparation. The mixing proportion design method comprises the steps of: firstly selecting a coarse aggregate category according to the concrete strength requirement, and testing the splitting tensile strength of coarse aggregates; then preparing mortar so that the splitting tensile strength of the mortar is equal to that of the coarse aggregates; and then trial-mixing concrete, wrapping the coarse aggregates with silica fume pastes, adding other components in the wrapped coarse aggregates, then standard-maintaining the coarse aggregates to the specified age, carrying out splitting tensile tests, observing whether the splitting fracture surface passes through the coarse aggregates, and if not, reducing the water-binder ratio to 0.02-0.04 until the splitting fracture surface passes through the coarse aggregates. When the concrete prepared and designed by the method is destroyed, hardened mortar and the coarse aggregates are destroyed, thus the two materials are fully utilized.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of concrete preparation, and in particular relates to a concrete mixing ratio design method capable of fully utilizing the properties of each component material. The method can make full use of the mechanical properties of hardened mortar and coarse aggregate, and design the concrete mix ratio through tests and calculations, so that the prepared concrete not only meets the strength requirements, but also has good economic efficiency. [0003] Background technique: [0004] Concrete structure is the most widely used structural form in the world today. The premise of constructing concrete structure is to carry out the mix ratio design, so the appropriate mix ratio design method is particularly important. Most countries have formulated relevant norms, procedures, standards, etc., such as ACI 211.1 in the United States, namely Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass ...

AI Technical Summary

Problems solved by technology

At present, billions of cubic meters of concrete are used every year in the world, and each cubic meter of concrete requires an average of about 1,000 kilograms of coarse aggregate, which will inevitably result in a huge waste of coarse aggregate.

In addition, existing concrete mix ratio design methods have encountered difficulties in designing ultra-high-strength concrete and ultra-low-density concrete