Impact-resistant graphene reinforced reactive powder concrete

Abstract

The invention discloses an impact-resistant graphene reinforced reactive powder concrete. Raw materials of the impact-resistant graphene-reinforced reactive powder concrete include cement, graphene, silica fume, fly ash, sands, a water reducer and water. The graphene can significantly enhance the dynamic compressive strength, the peak strain, the ultimate strain and the impact toughness of reactive powder concrete. When the strain rate is in a range of 200-800 / s and the dosage of the graphene is 0.25-0.5%, the dynamic compressive strength of concrete can be increased by 63.9%, the dynamic peakstrain can be increased by 66.0%, the dynamic ultimate strain can be increased by 32.7%, and the impact toughness can be increased by 117.0%.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an impact-resistant graphene-reinforced active powder concrete. Background technique [0002] Due to the advantages of high strength, high durability and high volume stability, reactive powder concrete has been gradually used in bridges, high-rise buildings, nuclear power and hydraulic engineering. However, the lack of coarse aggregate in reactive powder concrete results in a large number of fine aggregate-matrix interfaces inside the material. According to the theory of close packing, a large amount of fine powder with a water film on the surface will gather in the interface area, and then increase the pores in the interface area, weakening the overall performance of the concrete material to a certain extent. In addition, under the impact / explosion load, a large number of shock waves are rapidly transmitted inside the concrete structure. The brittle nature of the con...

AI Technical Summary

Problems solved by technology

However, the high price and high content of nanoparticles (1%-10% of cement quality) weakens its application prospect in practical engineering.

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