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Expressway bridge concrete structure crash barrier nanometer coating method

A concrete structure and anti-collision guardrail technology, which is applied in the surface treatment of expressway concrete structure anti-collision guardrail and the nano-coating field of expressway concrete structure anti-collision guardrail, can solve the problem of neglecting protection and can not fully meet the requirements of anti-chloride ion penetration and anti-snow melting salt. Corrosion etc.

Inactive Publication Date: 2018-05-15
甘肃众鼎工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current status usually ignores its protection, or the protection methods and methods are traditional, and cannot fully meet its comprehensive requirements in terms of aging resistance, carbonization resistance, chloride ion penetration resistance, sulfate ion corrosion resistance, and deicing salt corrosion resistance. Require

Method used

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  • Expressway bridge concrete structure crash barrier nanometer coating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Remove the original putty, coating, grease and other foreign matter on the concrete anti-collision guardrail; use tools such as electric grinder (dust-free wall grinder) and high-pressure water gun to polish and remove the aging layer and damaged layer on the concrete anti-collision barrier until it is exposed Rough and fresh concrete base, the concrete base should be brushed; the exposed corroded steel bar should be wiped and derusted; when derusting, use a brush to apply the derusting agent on the surface of the corroded steel bar to be derusted, Apply once every 5 to 10 minutes, and rinse with clean water after the rust is removed; according to the mass ratio of 1:1.5:5, take liquid E-51 bisphenol A epoxy resin and non-ionic modified polyamine respectively. Stir the curing agent and water evenly with a stirring electric drill in the batching tank to prepare the first water-based epoxy sealing primer; according to the mass ratio 1: 1.5: 3.5, take liquid E-51 bisphenol ...

Embodiment 2

[0061] The anti-collision guardrail is painted according to the method of embodiment 1, when just preparing water-based epoxy intermediate paint, the mass ratio of water-based epoxy intermediate paint A and water-based epoxy intermediate paint B is 1: 4.

Embodiment 3

[0063] The anti-collision guardrail is painted according to the method of embodiment 1, when just preparing water-based epoxy intermediate paint, the mass ratio of water-based epoxy intermediate paint A and water-based epoxy intermediate paint B is 1: 3.5.

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Abstract

The invention provides an expressway bridge concrete structure crash barrier nanometer coating method. The method includes the steps that a concrete crash barrier is treated, a concrete base layer isexposed, and broom-finish treatment is conducted; rust on rusted reinforcing steel bars is removed; two aqueous epoxy seal primers are prepared; one seal primer is painted on the defective inner surface on the concrete base layer, and the other seal primer is painted on the defective inner surface; the primers are air-dried, and a defect is filled and repaired through two types of aqueous epoxy mortar sequentially, polished and washed; the repaired crash barrier concrete surface is coated with the seal primers in a rolling mode; an aqueous epoxy intermediate coat is prepared; a completely-cured sealed layer is coated with the aqueous epoxy intermediate coat, so that an intermediate layer is obtained; silicone nanometer anticorrosive paint is prepared; and the completely-cured intermediatelayer is coated with the silicone nanometer anticorrosive paint, conventional curing is carried out until a nanometer anticorrosive layer is completely cured, and the crash barrier is coated. By the adoption of the coating method, the requirements for carbonization resistance, chloride penetration resistance, sulfate ion erosion resistance, snow melt salt corrosion resistance, scrubbing resistanceand the like of the concrete crash barrier can be fully met.

Description

technical field [0001] The invention belongs to the technical field of expressway bridges, and relates to a surface treatment method for concrete structure anti-collision guardrails of expressways, in particular to a nano-coating method for anti-collision guardrails of expressway concrete structures; Carbonation corrosion, chloride ion penetration, sulfate ion corrosion, snow melting salt corrosion, various chemical medium corrosion, aging, pulverization, shedding, exposed ribs and other problems are prone to occur. Background technique [0002] Concrete anti-collision guardrail is an important safety protection structure in expressway bridge engineering. It can prevent accidental vehicles from falling when driving vehicles lose control and traffic accidents, and maximize the driving safety of expressways. [0003] Concrete is a kind of artificial stone made of cementitious material (cement), water, coarse and fine aggregates in appropriate proportions, mixed into a mixture,...

Claims

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Application Information

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IPC IPC(8): E01D19/10E01D21/00
CPCE01D19/103E01D21/00
Inventor 陈永德王永刚徐伟何万鹏刘尚鑫
Owner 甘肃众鼎工程科技有限公司
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