Fracture-resistant and wear-resistant concrete for prestressed assembling type road surface

Abstract

The invention discloses fracture-resistant and wear-resistant concrete for a prestressed assembling type road surface. The fracture-resistant and wear-resistant concrete for the prestressed assemblingtype road surface comprises the following components in parts by weight: 100 parts of cement, 5 to 10 parts of steel slag, 5 to 10 parts of coal ash, 1 to 5 parts of silica fume, 200 to 300 parts offine aggregates, 250 to 300 parts of coarse aggregates, 5 to 10 parts of a swelling agent, 1.0 to 2.0 parts of a water reducer, 0.001 part of a defoaming agent, 0.01 to 0.02 part of an rheological aid, 0.1 to 0.5 part of a polymer emulsion, 0.5 to 2 parts of fiber and 35 to 50 parts of water. The fracture-resistant and wear-resistant concrete for the prestressed assembling type road surface has high strength, high crack resistance, impact resistance, high wear resistance and high durability, can be applied to heavy-load road surface panel engineering and also can be applied to other severely impacted structure key parts.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a bending-resistant and wear-resistant concrete used for prestressed assembled road surfaces. Background technique [0002] By the end of 2014, the total mileage of cement concrete pavement in the country has reached about 2 million kilometers, accounting for about 60% of high-grade pavement; although my country's cement concrete pavement continues to develop at a high speed, there are still many problems; pavement structure in the external environment (large temperature difference , freeze-thaw cycle, de-icing salt, pressure water scour, vehicle exhaust, etc.), traffic load and internal defects of the pavement structure, the phenomenon of rapid performance attenuation and deterioration occurs; even serious damage occurs, far from reaching the design service life Many cement concrete pavements begin to suffer from diseases after 3 to 5 years of opening to traffic, and th...

AI Technical Summary

Problems solved by technology

[0003] The deterioration forms of cement concrete pavement mainly include transverse and oblique cracks, corner fractures and cross network cracks, mud turning, water leakage, longitudinal cracks, platform dislocation, local settlement and arch expansion, expansion joints, false joints, joint impact vibration, Surface peeling, aggregate exposure, etc.; water and overload are generally considered to be important factors causing cement concrete pavement damage, while cracking and wear are the most common diseases of cement concrete pavement; Under the combined effect, the deterioration of cement concrete pavement is greatly accelerated; not only does not reflect the advantages of long service life and low maintenance cost of cement concrete pavement, but it further highlights the weakness of difficult maintenance

[0004] The use of prefabricated pavement can reduce the thickness of the pavement, save the amount of concrete, reduce the weight of the pavement, and at the same time greatly improve the flexural capacity of the pavement and reduce the incidence of broken boards. It is especially suitable for heavy-duty traffic and repair projects; prefabricated The concrete road slab is prefabricated by the factory, on the one hand, it can better control the quality of the road slab; on the other hand, it can be prefabricated in large quantities through the assembly line to speed up the construction period; the prefabricated prefabricated slab can be directly assembled manually, and the construction is fast and It saves construction time, has good economic benefits, and can avoid construction in harsh environments; although the prestressed fabricated pavement structurally improves the flexural performance, reduces the incidence of broken plates, and improves the service capacity of the pavement under harsh conditions , but the concrete's flexural and wear-resistant capabilities have not been improved, making it prone to damage such as peeling of the surface layer and exposure of aggregates; the life of concrete does not match the life of the structure well, so the development of high-bending and wear-resistant concrete very necessary