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Bridge widening material with no requirement of traffic interruption

A technology for bridges and transportation, which is applied in the field of cement-based materials and bridge width materials to achieve high tensile strength, high elongation, and enhanced ability to resist crack expansion

Active Publication Date: 2019-05-07
湖南固特邦土木技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical defects existing in the existing bridge widening materials, the purpose of the present invention is to provide a non-woven fabric with good fluidity, short setting time, high early strength, good volume stability, good cohesiveness and excellent crack resistance. Cement-based bridge widening material that interrupts traffic. The cement-based bridge widening material reduces the problem of joint cracking and water seepage by improving the deformation properties of the joint material and enhancing the interface bonding performance of the old and new bridge concrete. At the same time, by shortening the initial and final It can set the interval time and provide high early strength, so that the widening construction can be carried out without interrupting the traffic, which greatly improves the efficiency and facilitates the passage of vehicles

Method used

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  • Bridge widening material with no requirement of traffic interruption

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The bridge widening materials that do not interrupt traffic are calculated by mass parts, including: 55 parts of sulfoaluminate cement, 25 parts of PⅡ52.5 Portland cement, 14 parts of fly ash, 6 parts of silica fume, fine aggregate (10~ 20 mesh: 20~40 mesh: 40~100 mesh: 100~200 mesh=35%:30%:30%:5%) 100 parts, 0.2 parts of lithium carbonate, 0.3 parts of boric acid, styrene and butadiene copolymer glue 1 part of powder, 0.6 part of superplasticizer, 4 parts of steel fiber (diameter 0.2mm, length 13mm).

Embodiment 2

[0026] The bridge widening materials that do not interrupt traffic are calculated by mass parts, including: 50 parts of sulfoaluminate cement, 30 parts of PⅡ52.5 Portland cement, 12 parts of fly ash, 8 parts of silica fume, fine aggregate (10~ 20 mesh: 20~40 mesh: 40~100 mesh: 100~200 mesh = 33:32%:28%:7%) 120 parts, 0.3 part of calcium formate, 0.4 part of tartaric acid, styrene and butadiene copolymer rubber powder 2 parts, 1.2 parts of superplasticizer, 2 parts of polyvinyl alcohol fiber (12 μm in diameter, 12 mm in length).

Embodiment 3

[0028] The bridge widening materials that do not interrupt traffic are calculated by mass parts, including: 45 parts of sulfoaluminate cement, 35 parts of PⅡ52.5 Portland cement, 15 parts of fly ash, 5 parts of mineral powder, fine aggregate (10~ 20 mesh: 20~40 mesh: 40~100 mesh: 100~200 mesh=40%:30%:27%:3%) 80 parts, lithium carbonate 0.2 part, boric acid 0.4 part, vinyl acetate and ethylene copolymer rubber powder 1 part, 1.5 parts of superplasticizer, 0.5 part of polyvinyl alcohol fiber (12 μm in diameter, 15 mm in length).

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Abstract

The invention discloses a bridge widening material with no requirement of traffic interruption, wherein the bridge widening material comprises sulphoaluminate cement, Portland cement, fly ash, a highperformance mineral admixture, fine aggregate, an early strength agent, a retarder, polymer rubber powder, a superplasticizer, fiber and other components. According to the present invention, the bridge widening material has characteristics of good fluidity, short setting time, high early strength, good volume stability, good adhesion, excellent cracking resistance and the like, particular has short initial and final setting interval and high early compressive strength, and can ensure the normal construction of bridge widening seams in the case of no traffic interruption.

Description

technical field [0001] The invention relates to a cement-based material, in particular to a bridge widening material that does not interrupt traffic, and belongs to the technical field of building materials. Background technique [0002] With the rapid development of the economy and cities, the contradiction between the substantial increase in road traffic flow and the lower capacity of roads and bridges has become increasingly prominent. The roads and bridges built in the early days can no longer meet the traffic capacity of traffic vehicles. As the years change, it is often necessary to meet the needs of current traffic operations through expansion and other construction. The horizontal width of bridges is an effective and economical and environmentally friendly method to solve this problem, and it has been applied both at home and abroad. At present, in the bridge width at home and abroad, the cement-based materials used for joints mainly include UEA shrinkage compensatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
Inventor 单韧李军尹明韦庆胡铁钢
Owner 湖南固特邦土木技术发展有限公司