Rapid repairing construction method for old road through polyurethane-modified early-strength cement concrete

A polyurethane modified, early-strength cement technology, which is applied in road repair, roads, roads, etc., can solve the problems of high impact on normal road operation, generation of waste concrete, and increased costs, so as to improve physical and mechanical properties, reduce consumption, and save energy. cost effect

Inactive Publication Date: 2019-06-25
ZHEJIANG UNIV OF TECH
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Problems solved by technology

This treatment method has a long construction period and has a great impact on the normal operation of the highway.
In addition, chiseling away the concre

Method used

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Embodiment Construction

[0060] The present invention will be further described below.

[0061] A construction method for quickly repairing old cement pavement with ultra-thin overlay of polyurethane modified early-strength concrete, comprising the optimal mix ratio design of polyurethane-modified early-strength cement concrete and a construction method for quickly repairing old cement pavement, including the following steps:

[0062] (1) The mixing ratio design of polymer modified early-strength concrete, the process is as follows:

[0063] 1.1) Selection of raw materials

[0064] ① Cement: Choose PO42.5R or PO32.5R ordinary Portland cement, which is required to meet the cement technical indicators specified in the "Technical Rules for Road Cement Concrete Pavement Construction" (JTG / TF30-2014).

[0065] ② Coarse aggregate: basalt is used as coarse aggregate, which is hard, clean, free of weathered particles, and similar to cubic particles of sand and gravel. The technical performance meets the req...

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Abstract

The invention discloses a rapid repairing construction method for an old road through polyurethane-modified early-strength cement concrete. The method comprises the following steps of 1, designing a polyurethane-modified early-strength cement concrete matching ratio, wherein step 1 comprises the following procedures that 2.1) raw materials are selected, and 2.2) an orthogonal experiment is designed for determining the optimal matching ratio; 2, implementing the rapid repairing construction method for an old cement pavement through the polyurethane-modified early-strength cement concrete, wherein step 2 comprises the following procedures that 2.1) the materials are mixed, 2.2) the materials are conveyed, 2.3) an interface agent is sprayed, 2.4) the polyurethane-modified early-strength cement concrete is laid, 2.5) overlay face grooving and maintenance are conducted, and 2.6) a color surface layer is sprayed. Compared with a traditional asphalt concrete overlay face method, the polyurethane-modified early-strength cement concrete ultra-thin overlay face technology is advanced, the old cement pavement can be quickly repaired, and the method has obvious economic and technical advantages.

Description

technical field [0001] The invention belongs to the technical field of road surface construction in road engineering, and in particular relates to a construction method for quickly repairing old cement road surfaces of polyurethane modified early-strength concrete. Background technique [0002] So far, many cement concrete pavements (hereinafter referred to as "cement pavement") in China are close to the service life. Moreover, with the continuous increase of heavy-duty vehicles, cement pavement diseases are becoming more and more serious, threatening road traffic and traffic safety. [0003] Usually, when the cement pavement is repaired, the existing cement pavement is first knocked out, and then a new panel is poured or an overlay is added. This treatment method has a long construction period and has a great impact on the normal operation of the highway. In addition, chiseling away the concrete panels not only wastes resources, but also increases costs, and also produces...

Claims

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Application Information

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IPC IPC(8): E01C23/09E01C23/08C04B28/04C04B111/72
Inventor 刘萌成
Owner ZHEJIANG UNIV OF TECH
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