Graphene oxide ultra-high performance concrete with low cement consumption and preparation method thereof

Abstract

The invention provides graphene oxide ultra-high performance concrete with low cement consumption, which belongs to the technical field of building materials. The concrete comprises the following components in parts by weight: 100 parts of cement, 30-50 parts of silica fume, 60-120 parts of fly ash, 10-50 parts of slag powder, 80-120 parts of quartz sand, 30-50 parts of water, 20-50 parts of steelfiber, 2-10 parts of a water reducing agent and 1-10 parts of graphene oxide. The invention also provides a preparation method of the ultra-high performance concrete. The graphene oxide is compoundedwith the steel fiber concrete doped with the mineral fine powder, and the graphene oxide can promote cement hydration, improve the early and later strength of the concrete, improve the interface conditions of a matrix and steel fibers and improve the binding strength of the matrix and the steel fibers, so that the breaking strength of the concrete is improved. The graphene oxide can improve the pore structure of the concrete, so that the concrete is denser, the strength of the concrete is improved, concrete strength shrinkage caused by steam curing is avoided, and the durability of the concrete is further improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a graphene oxide low-cement-consumption ultra-high-performance concrete and a preparation method thereof. Background technique [0002] Ultra-high performance concrete (UHPC) is based on the preparation method of reactive powder concrete (RPC), by reducing the water-cement ratio, removing coarse aggregate, optimizing fine aggregate, adding active mineral ultra-fine powder and high-temperature steam curing, etc. It is a new type of cement-based composite material with ultra-high mechanical properties and excellent durability. [0003] The existing ultra-high-performance concrete has a large amount of cement, serious environmental pollution, and high preparation cost. In order to solve the problem of excessive cement consumption and environmental pollution, researchers have tried to replace cement with a large amount of mineral fine powder to prepare ultra-high performa...

AI Technical Summary

Problems solved by technology

[0003] The existing ultra-high performance concrete uses a large amount of cement, causing serious environmental pollution and high preparation costs

In order to change the problem of excessive cement consumption and environmental pollution, researchers have tried to replace cement with a large amount of mineral fine powder to prepare ultra-high performance concrete, but this will cause the problem of reduced cement hydration rate and reduced strength at 7d and 28d.

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