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Rapid repair mortar for partial damage of concrete base and preparation method thereof

A concrete base and repair mortar technology, which is applied in the field of building materials, can solve problems such as insufficient shear bond strength, failure of concrete repair, damage to new and old concrete bonded composite structures, etc., to improve waterproof performance and chloride ion penetration resistance , Improve physical and mechanical properties, improve the effect of shear bond strength

Active Publication Date: 2022-01-07
GUANGXI POLYTECHNIC VOCATIONAL & TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the shear bond strength of the new-old concrete interface is insufficient, it will cause damage to the bonded composite structure of the new-old concrete, and eventually lead to partial repair failure of the concrete

Method used

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  • Rapid repair mortar for partial damage of concrete base and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Raw materials (by weight):

[0033] 50 parts of aggregate, 20 parts of composite cement, 4 parts of styrene-butadiene emulsion, 1 part of coupling agent, 0.5 part of composite shrinkage reducing agent, 0.1 part of water-repellent agent, 0.1 part of graphene dispersion, and 0.1 part of polypropylene fiber.

[0034] Preparation:

[0035] S1, first dilute the styrene-butadiene emulsion with water, the volume ratio of the styrene-butadiene emulsion to water is 1:5-8, then add the carboxylated graphene oxide dispersion, and stir until it is completely uniform to obtain a mixture solution;

[0036] S2, aggregate, composite cement, coupling agent, composite shrinkage reducing agent, water repellent and polypropylene fiber are added to the mixer in proportion and stirred for 3-5 minutes; in the stirring state, slowly pour the mixture solution in step S1 In the mixer, after adding the mixture solution, continue to stir for 3-5 minutes to obtain a quick repair mortar for local d...

Embodiment 2

[0038] 70 parts of aggregate, 30 parts of composite cement, 8 parts of styrene-butadiene emulsion, 3 parts of coupling agent, 2 parts of composite shrinkage reducing agent, 0.5 part of water-repellent agent, 0.5 part of graphene dispersion, and 0.5 part of polypropylene fiber.

[0039] The preparation method of the local damage quick repair mortar of the above concrete base is the same as that of Example 1.

Embodiment 3

[0041] 60 parts of aggregate, 25 parts of composite cement, 5 parts of styrene-butadiene emulsion, 2 parts of coupling agent, 1 part of composite shrinkage reducing agent, 0.2 part of water-repellent agent, 0.2 part of graphene dispersion, and 0.2 part of polypropylene fiber.

[0042] The preparation method of the local damage quick repair mortar of the above concrete base is the same as that of Example 1.

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Abstract

The invention relates to a quick repair mortar for locally damaged concrete base and a preparation method thereof, which is characterized in that it comprises the following raw materials in parts by weight: 50-70 parts of aggregate, 20-30 parts of composite cement, and 4-8 parts of styrene-butadiene emulsion , 1-3 parts of coupling agent, 0.5-2 parts of composite shrinkage reducing agent, 0.1-0.5 parts of water-repellent agent, 0.1-0.5 parts of graphene dispersion, 0.1-0.5 parts of polypropylene fiber; the composite cement includes fluoroaluminate Cement and aluminate cement, the mass ratio of fluoroaluminate cement and aluminate cement is 2-3:1, the aggregate adopts natural sand, and the particle size of natural sand is 30-120 mesh, wherein, 30‑50 mesh accounts for 15%, 51‑80 mesh accounts for 55%, and 81‑120 mesh accounts for 30%. The invention adjusts the formula and proportion, mixes various trace additives, improves the pore structure of the mortar matrix, increases the compactness of the mortar, improves the construction performance and shrinkage performance of the repaired concrete, and the strength develops in a relatively short time after pouring Quickly meet the application requirements of local rapid repair of concrete base.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a local damage rapid repair mortar for concrete bases used in the rapid repair of local damaged parts in concrete roads, bridges and factory building concrete floors and a preparation method thereof. Background technique [0002] Concrete and reinforced concrete are widely used in various fields as the main building materials. Due to unreasonable concrete structure design, construction defects, environmental erosion, improper maintenance, etc. and its own aging, concrete structures are subject to heavy loads, freeze-thaw cycles, chloride ion penetration, surface abrasion, and corrosive media during long-term use. Affected by factors such as corrosion, cracking, peeling, hollowing and other phenomena appear in many concrete parts, which seriously affect the normal use of concrete structures, greatly affect the service life of the project, and bring great saf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B111/10C04B111/72
CPCC04B28/06C04B2111/72C04B2201/50C04B2201/10C04B2111/1062C04B7/32C04B14/06C04B24/2611C04B14/024C04B16/0633C04B24/42C04B2103/65C04B2103/58
Inventor 刘亚秋邱海亮胡顺新徐明殷琪
Owner GUANGXI POLYTECHNIC VOCATIONAL & TECHN COLLEGE
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