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Concrete containing PVA/PAN fibers and construction method of bridge floor waterproof layer

A construction method and concrete technology, applied in the field of concrete, can solve problems such as low quality of bridge deck waterproof layer, failure of waterproof layer, cracking and other problems

Active Publication Date: 2021-09-07
中国建筑土木建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide concrete containing PVA/PAN fibers and the construction method of the bridge deck waterproof layer, to sol

Method used

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  • Concrete containing PVA/PAN fibers and construction method of bridge floor waterproof layer
  • Concrete containing PVA/PAN fibers and construction method of bridge floor waterproof layer
  • Concrete containing PVA/PAN fibers and construction method of bridge floor waterproof layer

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Experimental program
Comparison scheme
Effect test

Embodiment

[0041] By testing the tensile strength, elastic modulus, ultimate elongation and other properties of different PVA / PAN fibers, data parameters are provided for the determination of the final concrete mix ratio of the waterproof layer.

[0042] Through the adjustment of the amount of PVA / PAN fiber added, the concrete compressive strength, splitting strength, impermeability, electric flux and other indicators of the waterproof layer are tested, and the final mix ratio is determined.

[0043] Optimize the construction process from fiber addition, coil laying, coil edge sealing, waterproof concrete vibration, etc., to ensure construction quality.

[0044] By selecting different PVA / PAN fibers to test their performance indicators, and through experiments to determine the proportion of waterproof concrete for railway bridge decks based on PVA / PAN fibers.

[0045] Portable PVA / PAN fiber mixing and adding device, high polymer modified asphalt waterproof membrane lap joint edge sealing...

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Abstract

The invention discloses concrete containing PVA/PAN fibers and a construction method of a bridge floor waterproof layer. The concrete containing PVA/PAN fibers provided by the invention comprises the following components of: 324 kg of cement, 139 kg of fly ash, 657-710 kg of medium sand, 1118-1129 kg of gravel, 5.09 kg of an additive, 1 kg of fibers and 162-98 kg of water. According to the concrete containing PVA/PAN fibers and the construction method of the bridge floor waterproof layer, the defects that the upper portion of the bridge floor waterproof layer is affected by operation loads and the lower portion of the bridge floor waterproof layer is affected by beam creep can be effectively overcome, failure, damage and cracking of a bridge floor are prevented, the quality of the bridge floor waterproof layer is improved, and concrete cracks and other diseases are reduced. The concrete containing PVA/PAN fibers and the construction method of the bridge floor waterproof layer have great significance in improving the overall durability of a bridge.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to concrete containing PVA / PAN fibers and a construction method for a bridge deck waterproof layer. Background technique [0002] The service life of reinforced concrete beams of railways is very easy to be shortened due to rainwater penetration, and the construction of waterproof layer of railway concrete bridge decks is the most effective measure to improve the durability of reinforced concrete bridges. [0003] The concrete bridge deck waterproof layer is composed of base treatment agent coating, polymer modified asphalt membrane, and fiber concrete protective layer. The upper part of the bridge deck waterproof layer is affected by operating load, and the lower part is affected by beam creep, which can easily lead to its failure. Therefore, improving the quality of the bridge deck waterproof layer and reducing concrete cracks and other diseases are of great significance to impro...

Claims

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Application Information

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IPC IPC(8): C04B28/00E01D19/08E01D21/00E01D101/24E01D101/26E01D101/40C04B111/27C04B111/34C04B111/20
CPCC04B28/00E01D19/083E01D21/00E01D2101/24E01D2101/266E01D2101/40C04B2111/27C04B2201/50C04B2111/343C04B2111/20C04B18/08C04B14/02C04B16/0641C04B16/0658
Inventor 王志成王永红李路路武凌春陈德霞
Owner 中国建筑土木建设有限公司