Highway construction and maintenance method based on cement-based composite material

A composite material and composite material component technology, applied in the field of composite material construction, can solve the problems of poor tensile and elongation properties, poor construction stability, low construction efficiency, etc. The effect of stable migration performance, weakening interface strength and shortening construction time

Inactive Publication Date: 2020-01-17
维特国际新材料(武汉)有限公司
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  • Description
  • Claims
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Problems solved by technology

However, in the traditional construction method, when the fiber in the ECC material is directly used on the concrete pavement, the combination with the matrix is ​​weak, the tensile and elongation properties of the ECC material are poor, and the construction efficiency is low, and the construction stability is poor.

Method used

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  • Highway construction and maintenance method based on cement-based composite material

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specific Embodiment

[0060] 1. Preparation method

[0061] 1. Modified polyvinyl alcohol fiber:

[0062] 1) prepare epoxy resin pretreatment liquid; prepare diluted epoxy resin pretreatment liquid, the epoxy resin diluent selects alcohol, wherein the mass fraction of epoxy resin is 12%.

[0063] 2) Soak the polyvinyl alcohol fiber in the epoxy resin pretreatment solution; soak the untreated polyvinyl alcohol fiber in the epoxy resin pretreatment solution, the soaking temperature is 62°C, and the soaking time is 3h.

[0064] 3) After the pretreatment, the polyvinyl alcohol fiber is dried; the polyvinyl alcohol fiber soaked in the epoxy resin pretreatment solution is taken out, and vacuum-dried to a constant weight with a vacuum drying oven at a drying temperature of 63°C.

[0065] 4) The surface of the polyvinyl alcohol fiber is coated with hydrophobic fumed silica; the dried polyvinyl alcohol fiber and hydrophobic nano fumed silica are mechanically stirred and mixed, and the particle size is 50-7...

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Abstract

The invention discloses a highway construction and maintenance method based on a cement-based composite material. The method comprises the following steps: 1) modifying polyvinyl alcohol fibers; 2) material preparation: firstly, carrying out dry mixing on cement, fly ash and sand for 1-6 minutes; adding water and a water reducing agent, then adding a nano graphene sheet or graphene oxide dispersion liquid, stirring at a low speed for 5-10 minutes, adding modified polyvinyl alcohol fibers while stirring after uniformly flowing cement mortar is obtained, and stirring at a high speed for 5-10 minutes after all the modified polyvinyl alcohol fibers are added; carrying out a flow table fluidity experiment on the slurry in the stirring process until the fluidity of the slurry reaches 200 mm or above and the fibers are uniformly dispersed; 3) precasting cement-based composite material components; and 4) carrying out paving; according to the invention, the construction performance is good, theconstruction cost is low, and construction is convenient.

Description

technical field [0001] The invention relates to a composite material construction method. More specifically, the present invention relates to road construction and maintenance methods based on cementitious composite materials. Background technique [0002] Cement concrete pavement is widely used in highway construction at home and abroad. It has the characteristics of high strength, high rigidity and good durability. However, cement concrete pavement is prone to various durability diseases, resulting in shortened service life. The high-ductility cement-based composite (ECC) has excellent mechanical properties and durability, and can be used as a new type of pavement material. [0003] ECC (Engineered Cementitious Composites) material is a high-ductility fiber-reinforced cement-based composite material. It is a new type of civil engineering material with pseudo-strain hardening characteristics and multi-slit cracking characteristics optimized based on micro-mechanical princi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/10E01C19/18C04B14/02C04B16/06C04B20/12C04B28/00
CPCC04B14/024C04B16/0641C04B20/12C04B28/00E01C19/1013E01C19/185C04B18/08C04B14/06C04B22/002C04B2103/302C04B20/1037C04B20/1066
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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