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High-speed railway concrete waterproof construction method

A construction method, concrete technology, applied in the direction of antifouling/underwater paint, coating, paint containing biocide, etc., can solve the problem that the waterproof coating film is prone to dark bubbles, pinholes, cannot be scraped or rolled, viscosity problems such as rising, to achieve the effects of excellent physical and mechanical properties, outstanding chemical resistance, and improved antibacterial properties

Inactive Publication Date: 2016-12-21
上海基典防水科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the two-component polyurethane waterproof coating for high-speed rail has a batching process before construction, measurement errors are prone to occur, resulting in a decrease in the physical properties and waterproof effect of the waterproof coating; the coating is prone to foaming during the stirring process, making it easy to appear dark in the middle of the waterproof coating. Bubbles and pinholes will affect the appearance and waterproof effect; after components A and B are stirred evenly, the materials must be used up within the curing time, otherwise the viscosity of the materials will increase due to the reaction, and it will not be able to be scraped or rolled after thickening

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The waterproof construction method of high-speed rail concrete includes the following steps:

[0038] (1) Remove pollutants such as surface laitance, loose particles, oil stains on the surface of the high-speed rail concrete (the quality of the concrete bridge deck should meet the "Construction Quality Acceptance Standard for Railway Bridge and Culvert Engineering of Passenger Dedicated Line", control the moisture content to 5wt%), Control the smoothness of the concrete surface to 2mm / 1m, and treat the roughness of the concrete surface to meet the requirements of SP3~SP5, and then spray primer on the treated concrete surface, and the amount of primer spray is 0.5kg per square meter of concrete;

[0039] (2) After spraying the primer for 24 hours, spray polyurea waterproof coating on the concrete surface after spraying the primer to obtain a polyurea waterproof coating layer, and the thickness of the polyurea waterproof coating layer is 3mm;

[0040] (3) After 3 hours of...

Embodiment 2

[0049] It is basically the same as Example 1, except that the inorganic antibacterial agent is obtained by stirring and mixing uniformly zinc dihydrogen phosphate and zinc tungstate at a mass ratio of 1:1.

Embodiment 3

[0051] It is basically the same as in Example 1, except that the inorganic antibacterial agent is obtained by stirring and mixing uniformly silver bromide and zinc tungstate at a mass ratio of 1:1.

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Abstract

The invention discloses a high-speed railway concrete waterproof construction method, which comprises the following steps: (1) the surface of high-speed railway concrete is treated, and the treated concrete surface is sprayed with a primer; (2) the concrete surface sprayed with the primer is sprayed with a polyurea waterproofing coating; and (3) the concrete surface sprayed with the polyurea waterproofing coating is sprayed with a polyurethane waterproofing coating. According to the high-speed railway concrete waterproof construction method, through a reasonable ratio, types and use amounts of an antistatic agent and an inorganic antibacterial agent for high-speed railway waterproofing coatings are selected out. Thus, antibacterial property is raised, and the product has good antistatic property, excellent physical and mechanical properties, temperature resistance, weatherability, flame resistance, resistance to chemical reagents and prominent wear resistance, is convenient for construction and has high efficiency.

Description

technical field [0001] The invention relates to the technical field of waterproof construction, in particular to a waterproof construction method for high-speed rail concrete. Background technique [0002] High-speed railway is referred to as "high-speed railway", which refers to the transformation of the original line (linearization, gauge standardization), so that the maximum operating speed is not less than 200 kilometers per hour, or a new "high-speed new line" is specially built to make the operating speed reach 200 kilometers per hour. A rail system with at least 250 kilometers per hour. [0003] There are three main types of waterproof materials: waterproof membranes, polyurethane waterproof materials, and new polymer cement-based waterproof materials. Waterproof materials are mainly used to prevent rainwater, groundwater, industrial and civil water supply and drainage, corrosive liquids, and moisture and steam in the air from intruding into buildings. [0004] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D175/02C09D7/12C09D5/24C09D5/14B05D7/24
CPCC09D175/08B05D7/24B05D7/584B05D2203/30B05D2320/00B05D2451/00B05D2503/00B05D2518/00B05D2601/20B05D2602/00C08K3/16C08K3/24C08K3/32C08K3/34C08K5/098C08K5/19C08K13/02C08K2003/321C08L2201/02C08L2201/04C09D5/14C09D5/24C09D7/61C09D7/63C09D175/02
Inventor 宋国新
Owner 上海基典防水科技有限公司