Concrete for anchorage zone of highway bridge expansion device and preparation method thereof

A telescopic device and a technology for highway bridges, which are applied in the field of cement concrete building materials, can solve the problems of fewer manufacturers, increased costs, and high costs, so as to reduce maintenance cycles, improve compressive strength and flexural strength, and prevent tension and compression performance reduction effect

Inactive Publication Date: 2019-09-20
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It must be used in combination with sulphoaluminate cement and early strength agent to achieve the effect of improving early strength, and the scope of application is narrow
Moreover, sulphoaluminate cement is still not a mainstream cement type at present, and there are few manufacturers and high cost, which leads to the problem of cost increase

Method used

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  • Concrete for anchorage zone of highway bridge expansion device and preparation method thereof
  • Concrete for anchorage zone of highway bridge expansion device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A concrete for the anchorage area of ​​the telescopic device of a highway bridge, comprising 165.75 parts of water, 414.38 parts of PI52.5 cement, 618.79 parts of sand, 1201.08 parts of stone, 3.108 parts of water reducing agent, 11.28 parts of antifreeze, and 117 parts of steel fiber in parts by mass , PVA fiber 1.09 parts.

[0029] The preparation method of the concrete for the anchorage area of ​​the expansion device of the highway bridge comprises the following steps:

[0030] (1) Weigh the materials in parts by mass;

[0031] (2) Mix sand, stone, antifreeze, steel fiber, and PVA fiber and stir evenly; then add cement in turn and stir evenly, add water and stir for 2 minutes, add water reducing agent and stir for 1 minute, and pour the concrete block after the preparation is completed. Among them, the pouring method is: a. Pour half of the concrete in the test mold, and then place it on the vibrating table to vibrate for 30s; b. Pour the remaining concrete and vibr...

Embodiment 2

[0033] A concrete for the anchorage area of ​​the telescopic device of a highway bridge, including 160 parts of water, 410 parts of PI52.5 cement, 610 parts of sand, 1200 parts of stone, 30 parts of water reducing agent, 110 parts of antifreeze, and 110 parts of steel fiber according to parts by mass , 1 part of PVA fiber.

[0034] The preparation method of the concrete for the anchorage area of ​​the expansion device of the highway bridge comprises the following steps:

[0035] (1) Weigh the materials in parts by mass;

[0036] (2) Mix sand, stone, antifreeze, steel fiber, and PVA fiber and stir evenly; then add cement and stir evenly, add water and stir for 1.5 minutes, add water reducer and stir for 0.5 minutes, and pour the concrete block after the preparation is completed. Among them, the pouring method is: a. Pour half of the concrete in the test mold, and then place it on the vibrating table for 20 seconds; b. Pour the remaining concrete and vibrate for 20 seconds. Un...

Embodiment 3

[0038] A concrete for the anchorage area of ​​the telescopic device of a highway bridge, comprising 170 parts of water, 420 parts of PI52.5 cement, 620 parts of sand, 1210 parts of stone, 4 parts of water-reducing agent, 12 parts of antifreeze, and 120 parts of steel fiber according to parts by mass , 2 parts of PVA fiber.

[0039] The preparation method of the concrete for the anchorage area of ​​the expansion device of the highway bridge comprises the following steps:

[0040] (1) Weigh the materials in parts by mass;

[0041] (2) Mix sand, stone, antifreeze, steel fiber, and PVA fiber and stir evenly; then add cement and stir evenly, add water and stir for 2.2 minutes, add water reducing agent and stir for 1.5 minutes, and pour the concrete block after the preparation is completed. Among them, the pouring method is: a. Pour half of the concrete in the test mold, and then place it on the vibrating table to vibrate for 40s; b. Pour the remaining concrete and vibrate for 40s....

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Abstract

The invention relates to the technical field of cement concrete building materials, especially to concrete for an anchorage zone of a highway bridge expansion device and a preparation method thereof. A formula of the concrete comprises the following components, by mass: 160-170 parts of water, 410-420 parts of cement, 610-620 parts of sand, 1200-1210 parts of stone, 3-4 parts of a water reducer, 11-12 parts of an antifreezing agent, 110-120 parts of steel fibers, and 1-2 parts of PVA fibers. According to the invention, through a large number of experiments, a suitable concrete mix ratio and a reasonable manufacturing process, feeding sequence, stirring time and stirring mode of a test piece are obtained, which can effectively improve the early strength of the concrete and reduce the maintenance cycle of the concrete, thereby achieving the effect of rapid open to traffic.

Description

technical field [0001] The invention relates to the technical field of cement concrete building materials, in particular to concrete for the anchorage area of ​​expansion devices of highway bridges and a preparation method thereof. Background technique [0002] The building structure is the main skeleton of the building, and the material basis of the structure is the building material. The optimization and development of building structures continuously promote the renewal and development of building materials. Concrete is the most widely used building material in modern times, and it is also the most man-made material at present. [0003] The expansion device of the highway bridge directly bears the repeated impact of the wheel load and the influence of temperature in the bridge structure, and is exposed to the atmosphere for a long time, and the operating environment is relatively harsh. The concrete in the bridge expansion joint transition area directly bears the drivin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/02C04B14/06C04B14/48C04B16/0641C04B2103/302C04B2103/601
Inventor 黄民水周圣兰胡国祥王如宝顾箭峰张瑨李亮张茂坤
Owner WUHAN INSTITUTE OF TECHNOLOGY
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