Ultrahigh-toughness concrete and production method thereof

Abstract

The invention discloses an ultrahigh-toughness concrete and a production method thereof. The ultrahigh-toughness concrete is produced by proportionally mixing Portland cement, slag aggregate, steel fiber, silicon powder, flyash beads, lithium salt residue, latex, rubber powder, a nano waterborne binder, graphene-modified glass fiber, trimethylolpropane, sulfoaluminate clinker, a defoaming agent, polyoxyethylene alkyl ether, p-toluenesulfonic acid, nano silicon particles, nano calcium carbonate, elastic silicone acrylic emulsion, methyl N,N-dihydroxyethyl-3-aminopropanoate, water and a polycarboxylate superplasticizer. The ultrahigh-toughness concrete produced herein has high compressive strength, high tensile strength and lasting ultrahigh ductility and has good energy-dissipating capacityand elastic modulus.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an ultra-high toughness concrete and a preparation method thereof. Background technique [0002] Ordinary concrete is an artificial stone made of cementitious materials, coarse and fine aggregates and water in an appropriate proportion, and then hardened. From the macroscopic inspection of the concrete section, the concrete is composed of aggregate particles of different sizes and shapes and the hydrated cement paste of the discontinuous cementing medium. From the microscopic point of view, the two phases are neither uniform with each other in the microstructure. distribution, the microstructure itself is not homogeneous. The microstructure of the cement paste adjacent to the large-grained aggregate is usually quite different from the cement paste or mortar body in the system, that is, the interfacial transition zone. Since both the cement slurry body and the interface transit...

AI Technical Summary

Problems solved by technology

Since both the cement slurry body and the interface transition zone in concrete contain unevenly distributed, different types and quantities of solid phases, pores and microcracks, the concrete is susceptible to the influence of the external environment, resulting in the expansion of concrete microcracks and harmful substances. Intrusion causes concrete deterioration, reduces the durability of concrete, and affects the service life of concrete structures; at the same time, the compressive elastic modulus of existing concrete is low, and there is room for further improvement in compressive strength and flexural strength