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Cement slurry for concrete repair

A cement slurry and concrete technology, applied in the field of construction materials, can solve the problems of unbearable, high cost of resin mortar or concrete, etc., and achieve the effects of good durability, reduced bulk density, and improved water reducing rate

Inactive Publication Date: 2017-09-29
如皋市磨头建设开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This repair material can provide sufficient bonding force at the concrete interface and prevent the old concrete from being further corroded, but its disadvantage is that the cost of resin mortar or concrete is too high, and it is generally difficult to repair large areas or non-essential buildings. bear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The cement slurry used for concrete repair in this embodiment, the composition of the cement slurry is calculated in parts by mass: 30 parts of cement; 50 parts of carboxyl materials; 16 parts of fly ash; 10 parts of styrene-butadiene emulsion; 5.5 parts of early strength agent part; 0.8 part of antifoaming agent, wherein, carboxyl material is mixed by carboxymethyl cellulose sodium and carboxylated graphene, and the mass ratio of carboxymethyl cellulose sodium and carboxylated graphene is 1:2.3, and carboxylated Both the sodium methylcellulose and the carboxylated graphene have a particle size of 500 mesh powders.

Embodiment 2

[0019] The cement slurry used for concrete repair in this embodiment, the composition of the cement slurry is calculated in parts by mass: 30 parts of cement; 50 parts of carboxyl materials; 16 parts of fly ash; 10 parts of styrene-butadiene emulsion; 5.5 parts of early strength agent part; 0.8 part of defoamer, wherein, carboxyl material is mixed by carboxymethyl cellulose sodium and carboxylated graphene, and the mass ratio of carboxymethyl cellulose sodium and carboxylated graphene is 1: 2.5, and carboxylated Both the sodium methylcellulose and the carboxylated graphene have a particle size of 600 mesh powders.

Embodiment 3

[0021] The cement slurry used for concrete repair in this embodiment, the composition of the cement slurry is calculated in parts by mass: 30 parts of cement; 50 parts of carboxyl materials; 16 parts of fly ash; 10 parts of styrene-butadiene emulsion; 5.5 parts of early strength agent part; 0.8 part of defoaming agent, wherein, carboxyl material is mixed by carboxymethyl cellulose sodium and carboxylated graphene, and the mass ratio of carboxymethyl cellulose sodium and carboxylated graphene is 1:2.4, and carboxylated Both the sodium methylcellulose and the carboxylated graphene have a particle size of 550 mesh powders.

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Abstract

The invention relates to cement slurry for concrete repair. The cement slurry for concrete repair comprises the following components in parts by mass: 30-60 parts of cement, 20-50 parts of a carboxyl material, 12-16 parts of coal ash, 5-10 parts of a butylbenzene emulsion, 0.5-5.5 parts of an early strength agent and 0.2-0.8 parts of a defoamer. The cement slurry for concrete repair provided by the invention has the advantages that according to the cement slurry for concrete repair provided by the invention, the carboxyl material is added into the formula, so that initial set of cement slurry can be accelerated, the water reducing rate of mortar can be improved, and the volume-weight of newly mixed mortar is reduced; the ratio of bending strength to compressive strength and the adhesive strength of the mortar are obviously improved, so that the quickly repaired concrete is better in durability.

Description

technical field [0001] The invention relates to building materials, in particular to a cement slurry for concrete repair. Background technique [0002] It is not uncommon for concrete buildings and components to corrode and fail during service. Many concretes in wet or industrial environments are showing signs of corrosion damage. In non-ferrous metallurgy, chemical, paper and other industrial enterprises, 20% to 70% of concrete structures are subjected to various corrosive media to cause corrosion of structural materials, and the reconstruction of corroded structures is a costly project. It not only consumes a lot of It will also cause huge economic losses in production or life due to the outage of buildings: relevant data reports that this economic loss accounts for about 1.25% of national income. For example, the maintenance and reconstruction costs of concrete projects in the United States are as high as hundreds of billions of dollars. [0003] Carrying out partial r...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B111/72
CPCC04B28/00C04B2111/72C04B24/383C04B14/024C04B18/08C04B24/2676C04B2103/0068C04B2103/50
Inventor 范存睿
Owner 如皋市磨头建设开发有限公司
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