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Salt-freezing-resisting high-performance repairing mortar for repairing road concrete bridge

A technology for repairing mortar and concrete, which is applied in the field of highway concrete bridge maintenance, can solve the problems of lack of salt freeze resistance durability, poor compatibility, and unimproved durability of concrete structures, etc., and achieve high salt freeze resistance and denudation performance , long operating time and high durability

Inactive Publication Date: 2018-03-27
LIAONING PROVINCIAL TRANSPORTATION PLANNING & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the repair materials used do not have salt freeze resistance durability or poor compatibility, resulting in no improvement in the durability of the overall concrete structure after repair

Method used

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  • Salt-freezing-resisting high-performance repairing mortar for repairing road concrete bridge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The components and parts of the anti-salt freeze-resistant high-performance polymer repair mortar are as follows:

[0044] 220 parts of ordinary Portland cement, 45 parts of granulated blast furnace slag powder, 45 parts of fly ash, 20 parts of silica fume, 650 parts of quartz sand (20~200 mesh) (of which 20~40 mesh 30%, 40~70 mesh 35%, 70~120 mesh 15%, 120~200 mesh 20%), modified sulfonated melamine 3.5 parts, redispersible latex powder 7.5 parts, defoamer 0.45 parts, starch ether 0.45 parts, polyacrylonitrile fiber 0.4 parts share.

[0045] Put the weighed ordinary Portland cement, granulated blast furnace slag powder, fly ash, and silica fume into the dry mixer and stir in turn. The stirring time is 5 minutes, and the stirring speed is 200r / min; after that, the modified sulfonated melamine , redispersible latex powder, defoamer, starch ether, and polyacrylonitrile fiber are put into the dry mixer and stirred in sequence, the stirring time is 5min, and the stirring s...

Embodiment 2

[0048] 274 parts of ordinary portland cement, 48 parts of granulated blast furnace slag powder, 48 parts of fly ash, 20 parts of silica fume, 590 parts of quartz sand (20~200 mesh) (of which, 20~40 mesh 30wt% (volume percentage weight ), 40~70 mesh 35%, 70~120 mesh 15%, 120~200 mesh 20%), modified (group) sulfonated melamine 4.0 parts, redispersible latex powder 8.0 parts, defoamer 0.5 parts ( specific components), 0.5 parts of starch ether, and 0.5 parts of polyacrylonitrile fiber. (list of ingredients)

[0049] Put the weighed ordinary Portland cement, granulated blast furnace slag powder, fly ash, and silica fume into the dry mixer and stir in turn. The stirring time is 7 minutes, and the stirring speed is 280r / min; after that, the modified sulfonated melamine, The redispersible latex powder, defoamer, starch ether, and polyacrylonitrile fiber are put into the dry mixer and stirred in sequence, and the stirring time is 7 minutes, and the stirring speed is 280r / min; finally...

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Abstract

The invention relates to salt-freezing-resisting high-performance repairing mortar for repairing a road concrete bridge. The salt-freezing-resisting high-performance repairing mortar is prepared fromthe following raw materials: ordinary portland cement, granulated blast-furnace slag powder, fly ash, silicon ash, quartz sand, modified sulfonated melamine, redispersible latex powder, a de-foaming agent, starch ether and polyacrylonitrile fibers. The salt-freezing-resisting high-performance repairing mortar provided by the invention has the advantages that the salt-freezing-resisting high-performance polymer repairing mortar has relatively high durability and especially has extremely high salt freezing ablation resisting performance, freezing and thawing resisting performance and chloride ions penetration resisting performance.

Description

technical field [0001] The invention belongs to the technical field of maintenance of highway concrete bridges, and in particular relates to a high-performance salt-freeze-resistant repair mortar for repairing highway concrete bridges. Background technique [0002] Due to the advantages of low cost, long service life, and low maintenance costs, concrete structures have become the most widely used bridge structure for highways. However, due to the characteristics of the concrete structure's constituent materials and the environment in which they are used, performance degradation of this type of structure is inevitable, that is, durability problems arise. The freezing and thawing of bridge concrete in seasonally frozen areas and the excessive use of deicing salt lead to concrete deterioration, affecting the performance of concrete, accelerating the corrosion of steel bars in concrete, resulting in concrete salt freezing damage, and further reducing the service life of bridges....

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20C04B111/72
CPCC04B28/04C04B2111/20C04B2111/72C04B2201/50C04B18/141C04B18/08C04B14/06C04B24/16C04B2103/0057C04B2103/50C04B24/38C04B16/0658
Inventor 张冠华王佳伟宋承哲杨奇郭金波张潇刘心亮韩基刚
Owner LIAONING PROVINCIAL TRANSPORTATION PLANNING & DESIGN INST
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