Concrete for steel pipe arches and steel pipe concrete arch bridge

Abstract

The invention relates to concrete for steel pipe arches and a steel pipe concrete arch bridge. The concrete for steel pipe arches is made of the following raw materials: 353-438 kg / m<3> of cement, 57-71 kg / m<3> of fly ash, 29-36 kg / m<3> of mineral powder, 48-59 kg / m<3> of an expansion agent, 713-799 kg / m<3> of sand, 944-977 kg / m<3> of crushed stone, 6.3-7.9 kg / m<3> of a water reducer and 151 kg / m<3> of water. According to the concrete for steel pipe arches provided by the invention, the concrete for steel pipe arches is prepared by blending the dosage of the expansion agent in the concrete cementing material, matching the appropriate proportion of the sand and crushed stone, and combining the addition of the water reducer and the appropriate amount of water, so that the concrete for steelpipe arches with appropriate expansion performance and higher strength can meet the requirement of tight combination of the concrete for steel pipe arches and the inner wall of the steel pipe, the construction defects of the steel pipe arches are reduced, and the service life of the steel pipe arches is prolonged.

Description

technical field [0001] The invention belongs to the field of concrete, and in particular relates to concrete for a steel pipe arch and a steel pipe concrete arch bridge. Background technique [0002] At present, concrete has been widely used in engineering fields such as bridges, high-rise buildings, and airport construction. In the construction of large bridges, the fluidity, segregation resistance, high gap passability, and filling performance of concrete need to meet higher requirements. [0003] The Chinese invention patent with the authorized announcement number CN101274829B discloses a high early strength, high slump retention, and shrinkage compensation self-compacting C60 concrete, which is composed of cement, mineral powder, fly ash, stone powder, expansion agent, sand, stones, water reducing Composed of cement, viscosifier and water, the dosage of each component is: cement 330-360kg / m 3 , mineral powder 80-120kg / m 3 , fly ash 40-80kg / m 3 , stone powder 80-100kg / ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a concrete for steel pipe arch, so as to solve the problem that the compactness and expansion performance of existing concrete cannot meet the application requirements of concrete for steel pipe arch

[0006] The second object of the present invention is to provide a concrete-filled steel tube arch bridge to solve the problem of poor adaptability between existing steel tube arch ribs and concrete

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