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Bridge and tunnel fiber composite pouring flexible waterproof pavement and construction method

A fiber composite, flexible waterproof technology, applied in bridges, buildings, bridge parts, etc., can solve the problems of fatigue cracking of epoxy asphalt steel bridge deck pavement, insufficient durability of work with cracks, etc., to improve construction workability, The effect of reducing fatigue cracking and high modulus

Active Publication Date: 2021-04-20
JIANGSU SINOROAD ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide a bridge and tunnel fiber composite pouring flexible waterproof pavement, improve the coordination between steel bridge deck pavement and steel bridge deck deformation, and solve fatigue cracking and cracked work of epoxy asphalt steel bridge deck pavement The problem of insufficient durability

Method used

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  • Bridge and tunnel fiber composite pouring flexible waterproof pavement and construction method

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Effect test

Embodiment 1

[0050] A bridge and tunnel fiber composite pouring flexible waterproof pavement and construction method, comprising the following steps:

[0051] (1) Sand blast and derust the steel bridge deck. The cleanliness of the steel bridge deck after sand blasting and rust removal reaches Sa2.5 level, and the roughness is 108 μm;

[0052] (2) Weigh 81 parts of bisphenol F epoxy resin, 15 parts of epichlorohydrin, and 6 parts of graphite powder, stir and mix, react at 60°C for 1 hour, and quickly add 65 parts of dicyandiamide at one time The curing agent w was reacted at 75°C for 30 minutes, and cooled to room temperature to prepare a two-stage thermoplastic epoxy resin waterproof adhesive layer.

[0053] Table 1 Performance parameters of the two-stage thermoplastic epoxy resin waterproof adhesive layer

[0054] Pilot projects unit Test Results Tensile Strength (23°C) MPa 3.6 Elongation at break (23°C) ％ ≥142 Water impermeability (0.3MPa, 24h) - imp...

Embodiment 2

[0073] A bridge and tunnel fiber composite pouring flexible waterproof pavement and construction method, comprising the following steps:

[0074] (1) Sand blast and derust the steel bridge deck. The cleanliness of the steel bridge deck after sand blasting and rust removal reaches Sa2.5 level, and the roughness is 104 μm;

[0075] (2) Weigh 82 parts of bisphenol F-type epoxy resin, 13 parts of epichlorohydrin, and 7 parts of graphite powder, stir and mix, react at 60°C for 1 hour, and quickly add 60 parts of anhydride curing agent w , reacted at 75°C for 30 minutes, and cooled to room temperature to prepare a two-stage thermoplastic epoxy resin waterproof adhesive layer.

[0076] Table 1 Performance parameters of the two-stage thermoplastic epoxy resin waterproof adhesive layer

[0077] Pilot projects unit Test Results Tensile Strength (23°C) MPa 3.8 Elongation at break (23°C) ％ ≥134 Water impermeability (0.3MPa, 24h) - impermeable wat...

Embodiment 3

[0096] A bridge and tunnel fiber composite pouring flexible waterproof pavement and construction method, comprising the following steps:

[0097] (1) Sand blast and derust the steel bridge deck. The cleanliness of the steel bridge deck after sand blasting and rust removal reaches Sa2.5 level, and the roughness is 112 μm;

[0098] (2) Weigh 85 parts of bisphenol F epoxy resin, 14 parts of epichlorohydrin, and 5 parts of graphite powder, stir and mix, react at 60°C for 1 hour, and quickly add 62 parts of polyamide curing agent at one time w, react at 75°C for 30 minutes, and cool to room temperature to prepare a two-stage thermoplastic epoxy resin waterproof adhesive layer.

[0099] Table 1 Performance parameters of the two-stage thermoplastic epoxy resin waterproof adhesive layer

[0100] Pilot projects unit Test Results Tensile Strength (23°C) MPa 3.9 Elongation at break (23°C) ％ ≥148 Water impermeability (0.3MPa, 24h) - impermeable w...

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Abstract

The invention discloses a bridge and tunnel fiber composite pouring flexible waterproof pavement and construction method. A bridge and tunnel fiber composite pouring flexible waterproof pavement is of a layered composite structure. A two-stage thermoplastic epoxy resin waterproof bonding layer, a fiber composite pouring type asphalt concrete lower surface layer, a gravel embedding layer, a superimposed fiber epoxy resin bonding layer and a fiber composite resin upper surface layer are sequentially arranged on a steel bridge deck slab; the fiber composite pouring type asphalt concrete lower surface layer is prepared by mixing pouring type asphalt concrete with carbon fibers; and the gravel embedding layer and the fiber composite pouring type asphalt concrete are synchronously constructed. The fiber composite pouring type asphalt concrete has good deformation following performance on the bridge steel bridge deck slab, and the problem that a large-span and large-flexibility bridge steel bridge deck system pavement structure and the steel bridge deck slab are inharmonious in deformation is solved. The fiber resin mixture has excellent strength performance and high-temperature stability performance under high-temperature and heavy-load conditions, and the problems of fatigue cracking of epoxy asphalt steel bridge deck pavement and insufficient working durability with cracks are solved.

Description

technical field [0001] The invention relates to a steel bridge deck pavement structure and method, in particular to a bridge-tunnel fiber composite pouring flexible waterproof pavement and a construction method. Background technique [0002] With the acceleration of my country's economic construction, bridge construction has entered a stage of rapid development, bridge spans are getting larger and larger, large and heavy-duty traffic flows are also increasing, and freight vehicles are heavily loaded or even overloaded. For steel bridge deck pavement solutions The choice of pouring pavement has good deformation tracking for steel deck bridges and can solve the problem of deformation coordination, but it also faces the problem of deformation and damage under the coupling of extreme conditions of high temperature and heavy traffic ; Rigid epoxy pavement has a good load-bearing capacity, but from the actual use situation, there are common problems of early damage, which not only r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/12C04B26/14C04B111/00
CPCC04B26/14C04B2111/00E01D19/12E01D21/00
Inventor 张志祥张辉佟蕾李娣潘友强杜骋关永胜
Owner JIANGSU SINOROAD ENG TECH RES INST CO LTD
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