Modified rubber particle impact-resistant abrasion-resistant ultrahigh-toughness concrete and preparation method thereof

Abstract

The invention discloses modified rubber particle impact-resistant abrasion-resistant ultrahigh-toughness concrete, which is prepared from the following main raw materials: cement, fly ash micro-beads,silica fume, machine-made sand, modified rubber particles, hybrid fibers, an interface enhancer, a composite expanding agent, a shrinkage-reducing viscosity-reducing water reducing agent and water. According to the invention, the modified rubber particle impact-resistant abrasion-resistant ultrahigh-toughness concrete has advantages of excellent impact toughness, excellent corrosion resistance, good volume stability and high interface bonding strength of new and old concrete, can be widely applied to the field of construction, repair and reinforcement of hydraulic structures such as bridge piers and the like, can improve the bearing capacity and the service life of hydraulic structures such as the piers and the like, reduce the maintenance cost, achieve effective utilization of wastes andsolve the problems of shortage of quartz sand and river sand resources and the like in China, and has important economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a modified rubber particle abrasion-resistant ultra-high toughness concrete and a preparation method thereof. Background technique [0002] The terrain in the mountainous areas of western my country is complex, with many deep ditches and canyons, and a large number of bridges are built. However, natural disasters such as mudslides and floods frequently occur in mountainous areas, and solid debris such as sediment and stones flow quickly, have a large flow, and are destructive. Under the action of mountain torrents, mudslides, and dynamic load coupling, buildings have been in service for one to two years, and problems such as abrasion and cracks in the reinforced protective layer and concrete are common, causing huge safety hazards and high maintenance costs. However, the construction and repair and reinforcement materials of conventional hydraulic structures have low ...

AI Technical Summary

Problems solved by technology

[0002] The terrain in the mountainous areas of western my country is complex, with many deep ditches and canyons, and a large number of bridges are built. However, natural disasters such as mudslides and floods frequently occur in mountainous areas, and solid debris such as sediment and stones flow quickly, have a large flow, and are destructive. Under the action of mountain torrents, debris flow, and dynamic load coupling, the building will serve for one to two years, and problems such as abrasion and cracking of the reinforced protective layer and concrete will generally occur, resulting in huge safety hazards and high maintenance costs.

However, the construction and repair and reinforcement materials of conventional hydraulic structures have low strength, poor impact toughness and corrosion resistance, and cannot meet the actual needs of engineering in the complex environment of western mountainous areas.

[0003] Ultra-high-performance concrete has excellent mechanical properties and impact / abrasion resistance. It is an ideal construction and repair and reinforcement material for hydraulic structures such as bridge piers, but there are still the following technical problems: 2) The water-binder ratio is low and the amount of ultra-fine particles is high, so it shows the disadvantages of high viscosity and large slump loss, which is not conducive to pouring construction; 3) The interface bonding ability between new and old concrete is poor; many deficiencies limit its application in the construction and repair and reinforcement of bridge piers and other hydraulic structures

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