Bridge self-repairing paving method based on cement-based composite material

A composite material and composite material component technology, applied in the field of bridge self-healing pavement, can solve the problems of high repair construction complexity, low maintenance effect stability, low repair efficiency, etc., so as to reduce maintenance time, high construction efficiency, and low cost The effect of chemical adhesion

Inactive Publication Date: 2019-12-24
维特国际新材料(武汉)有限公司
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Problems solved by technology

[0004] However, in actual repair projects, especially large-area repairs, the stability of the maintenance effect of ECC mater

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  • Bridge self-repairing paving method based on cement-based composite material

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[0085] 1. Preparation method

[0086] 1. Material preparation:

[0087] The main raw materials for preparing cement-based composite materials include cement, fly ash, rubber powder, quartz sand, polyvinyl alcohol fiber, superplasticizer and water. The cement used in this paper is the Conch brand P42.5R Portland cement produced by China Cement Factory; the fly ash is the first-grade fly ash of Nanjing Thermal Power Plant; the quartz sand is provided by Nanjing Ningliu Quartz Filter Company, and the particle size is 80 mesh-150 mesh; rubber powder particle size is 40 mesh-80 mesh; high-efficiency water reducer is carboxylic acid-based water reducer.

[0088] 2. Test piece preparation

[0089] The material ratio is cement: fly ash: rubber powder: quartz sand: polyvinyl alcohol fiber: superplasticizer: water = 1:2:1:0.36:0.02:0.03:0.25. During the slurry forming process, first weigh the fly ash, cement, quartz sand, and rubber powder, then pour them into the mortar mixer and st...

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Abstract

The invention discloses a bridge self-repairing paving method based on a cement-based composite material. The method comprises the following steps: 1) preparing materials: respectively weighing cement, fly ash, rubber powder, quartz sand, polyvinyl alcohol fibers, a high efficiency water reducing agent and water; with the mass ratio of the fly ash to the cement being 2-2.5, and the particle size range of the rubber powder being 40-80 meshes; 2) preparing a test piece; 3) maintaining the test piece; 4) prefabricating cement-based composite material components; and 5) performing pavement: conveying a roller wound with the prefabricated cement-based composite material components to a bridge construction site, gradually releasing the prefabricated cement-based composite material components, and paving the components onto a bridge base layer or a bridge surface layer till pavement is completed. The method is high in construction efficiency, convenient to construct and low in construction cost.

Description

technical field [0001] The invention relates to a composite material construction method. More specifically, the present invention relates to methods of self-repairing bridge paving based on cement-based composite materials. Background technique [0002] Traditional road pavement materials (asphalt concrete or cement concrete) are easy to crack and produce cracks under the combined action of traffic load and surrounding environmental factors, and cracks are inevitable within the service life, so the pavement materials are always working with cracks within the service life state. The surrounding environment and stress state of the steel bridge deck pavement are more complex and harsh. Even if epoxy asphalt concrete is used as the steel bridge deck pavement, crack damage is still the main form of failure. Due to the appearance of cracks, harmful substances such as water and chloride ions penetrate into the connecting layer between the pavement and the steel plate through the...

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Application Information

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IPC IPC(8): C04B28/00E01C7/14
CPCC04B28/00E01C7/142E01C7/147
Inventor 胡汉桥魏小华张运华王欣
Owner 维特国际新材料(武汉)有限公司
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