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Steel bridge deck high-ductility cement-based composite material paving structure and construction method

A composite material and construction method technology, applied in bridges, bridge parts, bridge construction, etc., can solve problems such as high brittleness, poor fatigue resistance, and short service life

Pending Publication Date: 2021-07-06
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing steel bridge deck cement-based composite material pavement structure is relatively brittle, easy to crack, poor in fatigue resistance, and has a short service life. Therefore, it is necessary to improve the pavement structure and construction method

Method used

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  • Steel bridge deck high-ductility cement-based composite material paving structure and construction method
  • Steel bridge deck high-ductility cement-based composite material paving structure and construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A steel bridge deck high-ductility cement-based composite material pavement structure, including a high-ductility cement-based composite material pavement layer 3 and an adhesive layer 2, the bottom of the high-ductility cement-based composite material pavement layer 3 passes through the adhesive layer 2 connected with the upper surface of the steel bridge deck layer 1;

[0032] The adhesive layer 2 is a water-based epoxy resin adhesive;

[0033] The thickness of the adhesive layer 2 is 1-1.5mm;

[0034] The high-ductility cement-based composite material pavement layer 3 is formed by on-site pouring of high-ductility cement-based composite materials;

[0035] The high-ductility cement-based composite material includes the following components: P.O 42.5 cement, PVA fiber, fly ash, 70-140 mesh quartz sand, and high-efficiency water reducer; the mass of each component in 1 cubic meter is: cement 235kg, powder Coal ash 940kg, water 352.5kg, quartz sand 423kg, PVA fiber 26...

Embodiment 2

[0038] A construction method for a steel bridge deck high ductility cement-based composite material pavement structure, comprising:

[0039] Step 1. Clean the steel bridge deck, blast and derust the steel bridge deck and spray epoxy zinc-rich paint to form an anti-rust layer 4;

[0040] Step 2. Apply water-based epoxy resin adhesive, and keep the thickness of the adhesive at 1-1.5mm;

[0041] Step 3, paving the high-ductility cement-based composite material;

[0042] Step 4. After the high-ductility cement-based composite material is paved, it is wet-cured, covered with geotextiles and plastic films for curing, and the curing time is at least 7 days.

Embodiment 3

[0044] Described step 3 comprises following construction steps:

[0045] 3.1. High-ductility cement-based composite materials are produced by factory mixing and can be used only after passing the inspection;

[0046] 3.2. Pour the high-ductility cement-based composite material into the paving equipment and spread it evenly on the adhesive layer. The thickness of the high-ductility cement-based composite material paving is controlled at 5-6cm. On the surface of high-ductility cement-based composite materials, during the vibration compaction process, the vibration test piece should not exceed 20s to prevent excessive vibration from causing fiber agglomeration or matrix bleeding;

[0047] 3.3. Use a screed to smooth the surface, and complete the plastering of the high-ductility cement-based composite pavement layer.

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Abstract

The invention relates to a steel bridge deck high-ductility cement-based composite material pavement structure and a construction method, the steel bridge deck high-ductility cement-based composite material pavement structure comprises a high-ductility cement-based composite material pavement layer and an adhesive layer, and the bottom of the high-ductility cement-based composite material pavement layer is connected with the upper surface of a steel bridge deck slab layer through the adhesive layer; the adhesive layer is a water-borne epoxy resin adhesive; the thickness of the adhesive layer is 1-1.5 mm; and the high-ductility cement-based composite material pavement layer is formed by casting a high-ductility cement-based composite material on site. According to the invention, the high-ductility cement-based composite material is used for steel bridge deck pavement by adopting a wet bonding technology, so that not only can many disease problems of asphalt concrete be avoided, but also the brittleness problem of a conventional cement-based material can be overcome, the anti-cracking and anti-fatigue capabilities of the pavement structure can be greatly improved, and the service life is prolonged. Meanwhile, due to the application of the high-ductility cement-based composite material, the steel plate bridge pavement structure is simpler, the construction procedure is simplified, the human resource cost is saved, and the steel bridge deck high-ductility cement-based composite material pavement structure has the advantages of being economical in manufacturing cost, convenient to construct and the like.

Description

technical field [0001] The invention relates to the technical field of steel bridge deck engineering construction, in particular to a steel bridge deck high ductility cement-based composite material pavement structure and a construction method. Background technique [0002] With the rapid development of my country's transportation industry, bridge construction technology has been continuously improved. Steel bridges are widely used due to their strong bearing capacity, high degree of industrialization, convenient erection, and short construction period. [0003] The pavement materials for steel bridge decks can be roughly divided into two categories: cement concrete pavement materials and asphalt concrete pavement materials. Asphalt concrete bridge decks have good driving comfort, fast construction speed, and easy maintenance, but they are prone to cracking. The bonding performance between the steel bridge deck and the asphalt concrete pavement layer is poor, and it is pron...

Claims

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Application Information

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IPC IPC(8): E01D19/12E01D19/08E01D21/00C04B28/00
CPCE01D19/125E01D19/08E01D21/00E01D19/083C04B28/00
Inventor 吴淑印杨来顺高雪单景松宗新耀
Owner SHANDONG UNIV OF SCI & TECH
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