Graphene oxide anti-abrasion ultra-high toughness concrete and preparation method and application thereof

Abstract

The invention discloses a graphene oxide anti-abrasion ultra-high toughness concrete. The concrete comprises the following raw materials in parts by weight: 700 to 800 parts by mass of cement, 150 to200 parts by mass of fly ash microbead, 150 to 200 parts by mass of silica fume, 900 to 1080 parts by mass of machine-made sand, 23 to 50 parts of hydrophilic rubber particle, 160 to 200 parts of hybrid fibers, 34.5 to 37.95 parts of shrinkage and viscosity reducing water reducing agent, 0.005 to 0.01 part of graphene oxide, 46 to 69 parts of composite expansion agent and 207 to 218.5 parts of water; the hybrid fiber is formed by mixing copper plated flat steel fiber, multi-anchor steel fiber and PVA fiber according to the mass ratio of 6-8: 1-2: 1-2. The graphene oxide anti-impact and anti-wear ultra-high toughness concrete prepared by the invention has excellent impact toughness and anti-wear performance, good volume stability and high interface bonding strength between new and old concrete.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a graphene oxide abrasion-resistant ultra-high toughness concrete and a preparation method and application thereof. Background technique [0002] Due to frequent natural disasters such as mudslides and floods in mountainous areas, solid debris such as sediment and stones have a fast flow rate, large flow rate, and strong destructive power. Two years later, the concrete of the reinforced protective layer will generally appear to be worn off and cracked, resulting in huge safety hazards and high maintenance costs. Conventional hydraulic structure construction and repair and reinforcement materials have low strength, poor impact toughness and corrosion resistance, and cannot meet the actual needs of engineering in complex environments. [0003] Ultra-high performance concrete has excellent mechanical properties and impact / abrasion resistance. It is an ideal constructio...

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Problems solved by technology

[0002] Due to frequent natural disasters such as mudslides and floods in mountainous areas, solid debris such as sediment and stones have a fast flow rate, a large flow rate, and strong destructive power. After two years, the reinforced protective layer concrete will generally appear abrasion loss and cracks, resulting in huge safety hazards and high maintenance costs

Conventional construction and repairing and reinforcement materials for hydraulic structures have low strength, poor impact toughness and corrosion resistance, and cannot meet the actual needs of engineering in complex environments.

[0003] Ultra-high performance concrete has excellent mechanical properties and impact / abrasion resistance. It is an ideal construction and repair reinforcement material for hydraulic structures such as bridge piers. However, due to the high amount of cementitious materials used in the preparation process of ultra-high performance concrete, early shrinkage Large, which seriously affects the volume stability of the concrete structure; the water-binder ratio is low, and the amount of ultrafine particles is high, so it shows the disadvantages of high viscosity and large slump loss, which is not conducive to pouring construction; and the interface between new and old concrete is bonded The ability is poor, and many deficiencies limit its application in the construction and repair and reinforcement of bridge piers and other hydraulic structures

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