High-ductility repair mortar with self-healing function and preparation method thereof

A high ductility and functional technology, applied in the field of reinforcement and repair mortar, can solve the problem that cement-based composite materials do not have self-healing properties, and achieve the effect of improving the repair level, improving the strength and ductility of mortar, and ensuring durability.

Inactive Publication Date: 2021-02-09
TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in use, it was found that the cement-based composite material does not have self-healing properties

Method used

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  • High-ductility repair mortar with self-healing function and preparation method thereof
  • High-ductility repair mortar with self-healing function and preparation method thereof
  • High-ductility repair mortar with self-healing function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-ductility repair mortar with self-healing function is prepared according to the following steps:

[0034] 1) According to the mass ratio of gel material: quartz sand: water: concrete expansion agent: PM109 polycarboxylate superplasticizer: polyvinyl alcohol fiber: 10.37: 4.75: 2.6: 0.0518: 0.02375: 0.1685, weigh the raw materials respectively; Among them, the gel material is P.O.42.5 cement and first-class fly ash, and the first-class fly ash accounts for 58% of the gel material;

[0035] 2) Mix P.O.42.5 cement, first-grade fly ash, quartz sand, PM109 polycarboxylate superplasticizer and concrete expansion agent, and stir for 10 minutes at a speed of 30-50 rpm to make the materials evenly mixed;

[0036] 3) Add water to the homogeneously mixed material obtained in step 2), and stir for 15 minutes at a speed of 30-50 rpm to obtain the base material;

[0037] 4) Under stirring at a speed of 30-50 rpm, put the polyvinyl alcohol fiber into the substrate obtained in ...

Embodiment 2

[0039] A high-ductility repair mortar with self-healing function is prepared according to the following steps:

[0040] 1) According to the mass ratio of gel material: quartz sand: water: concrete expansion agent: PM109 polycarboxylate superplasticizer: polyvinyl alcohol fiber: 10.37: 4.75: 2.6: 0.0518: 0.02375: 0.1800, weigh the raw materials respectively; Among them, the gel material is P.O.42.5 cement and first-class fly ash, and the first-class fly ash accounts for 58% of the gel material;

[0041] 2) Mix P.O.42.5 cement, first-grade fly ash, quartz sand, PM109 polycarboxylate superplasticizer and concrete expansion agent, and stir for 10 minutes at a speed of 30-50 rpm to make the materials evenly mixed;

[0042] 3) Add water to the homogeneously mixed material obtained in step 2), and stir for 15 minutes at a speed of 30-50 rpm to obtain the base material;

[0043] 4) Under stirring at a speed of 30-50 rpm, put the polyvinyl alcohol fiber into the substrate obtained in ...

Embodiment 3

[0045] A high-ductility repair mortar with self-healing function is prepared according to the following steps:

[0046] 1) According to the mass ratio of gel material: quartz sand: water: concrete expansion agent: PM109 polycarboxylate superplasticizer: polyvinyl alcohol fiber: 10.37: 4.75: 2.6: 0.0518: 0.02375: 0.2022, weigh the raw materials respectively; Among them, the gel material is P.O.42.5 cement and first-class fly ash, and the first-class fly ash accounts for 58% of the gel material;

[0047] 2) Mix P.O.42.5 cement, first-grade fly ash, quartz sand, PM109 polycarboxylate superplasticizer and concrete expansion agent, and stir for 10 minutes at a speed of 30-50 rpm to make the materials evenly mixed;

[0048] 3) Add water to the homogeneously mixed material obtained in step 2), and stir for 15 minutes at a speed of 30-50 rpm to obtain the base material;

[0049] 4) Under stirring at a speed of 30-50 rpm, put the polyvinyl alcohol fiber into the substrate obtained in ...

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Abstract

The invention provides high-ductility repair mortar with a self-healing function and a preparation method thereof. The high-ductility repair mortar with the self-healing function is prepared from a cementing material, quartz sand, water, an expanding agent, a water reducing agent and fibers. The high-ductility repair mortar with the self-healing function overcomes the defects of existing reinforcing and repairing materials, the ductility and the self-repairing capacity of the reinforcing material are improved, the reinforcing and repairing effect of a port engineering concrete structure can beimproved, and the durability of the port engineering concrete structure is improved.

Description

technical field [0001] The invention belongs to the technical field of reinforcement and repair mortar for port hydraulic structures, and in particular relates to a high-ductility repair mortar with self-healing function and a preparation method thereof. Background technique [0002] Improving the durability of reinforced concrete structures is crucial to improving the service life of coastal port wharf projects. However, at present, the corrosion of steel bars and cracking of concrete caused by chloride ion corrosion in the concrete structure of port engineering are common, which has become a stubborn disease of the concrete structure of coastal port engineering. At the same time, the concrete structure of the port project also has the problems of poor ductility and weak impact resistance. For component damage in production, there is an urgent need for a reinforcement repair material with good durability, good ductility, good repair effect, and convenient construction. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B16/06C04B111/72
CPCC04B16/0641C04B28/04C04B2111/72C04B2201/50C04B18/08C04B14/06C04B2103/302C04B22/002C04B2103/0068
Inventor 刘红彪
Owner TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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