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Grouting material for reinforcing and strengthening concrete used underwater

A grouting material and concrete technology, applied in the directions of adhesive additives, non-polymer adhesive additives, epoxy resin glue, etc., to achieve the effects of reducing surface tension, good acid and alkali resistance, and good mechanical properties

Inactive Publication Date: 2015-05-27
上海颖川佳固信息工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a grouting material for underwater concrete crack repair and reinforcement, so as to solve the above-mentioned shortcomings in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0023] Using butyl acetate as solvent, the reaction temperature is 130°C, the reaction time is 4 h, the mass ratio of raw materials is m(maleic anhydride):m(E-44)=8.6:100, and the water-based epoxy resin is prepared. The graft ratio (RGH) of the resin is 86.09%, and the epoxy retention ratio (RRE) is 96.69%.

[0024] Use 100 parts of water-based epoxy resin prepared above, 50 parts of phenalkamine curing agent, 20 parts of acetone, and 20 parts of furfural, and mix them to form a grouting material for underwater concrete reinforcement.

[0025] The grouting material obtained in this example has an initial setting time of 24 hours and a 7-day compressive strength of 45 MPa. It can be completely solidified in underwater concrete gaps through engineering practice and bonded to the surface of the concrete. The bonding strength is greater than 4 MPa. .

Embodiment example 2

[0027] Using butyl acetate as solvent, the reaction temperature is 130°C, the reaction time is 4 h, the mass ratio of raw materials is m(maleic anhydride):m(E-44)=10:100, and the water-based epoxy resin is prepared. The graft ratio (RGH) of the resin is 83.36%, and the epoxy retention ratio (RRE) is 93.42%.

[0028] Use 100 parts of the above-mentioned epoxy resin, 50 parts of phenalkamine curing agent, 30 parts of acetone, and 10 parts of furfural, and mix them to form a grouting material for underwater concrete reinforcement.

[0029] The grouting material obtained in this example has an initial setting time of 24 hours and a 7-day compressive strength of 42 MPa. It can be completely solidified in the underwater concrete gap through engineering practice and bonded to the surface of the concrete. The bonding strength is greater than 3.8 MPa.

Embodiment example 3

[0031] Using butyl acetate as solvent, the reaction temperature is 130°C, the reaction time is 4 h, the mass ratio of raw materials is m(maleic anhydride):m(E-44)=10:100, and the water-based epoxy resin is prepared. The graft ratio (RGH) of the resin is 83.36%, and the epoxy retention ratio (RRE) is 93.42%.

[0032] Use 100 parts of the above-mentioned epoxy resin, 40 parts of phenalkamine curing agent, 20 parts of acetone, and 40 parts of ground fine aggregate containing silica and ore rock, and mix them to form a grouting material for underwater concrete reinforcement.

[0033] The grouting material obtained in this example has an initial setting time of 24 hours and a 7-day compressive strength of 45 MPa. It can be completely solidified in underwater concrete gaps through engineering practice and bonded to the surface of the concrete. The bonding strength is greater than 4 MPa. .

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Abstract

The invention relates to a grouting material for reinforcing and strengthening concrete used underwater. The grouting material for reinforcing and strengthening the concrete used underwater is mainly prepared from the following components: 100 parts of epoxy resin, 20-40 parts of diluent and 40-50 parts of a phenolic amine curing agent, wherein the epoxy resin is self-emulsification modified waterborne epoxy resin with the characteristics of a surfactant. The grouting material for reinforcing and strengthening the concrete used underwater has the advantages that compressive strength 7 days after maintenance can reach up to 45.6MPa, wet bonding strength of epoxy mortar and concrete can reach up to 4.08MPa, and the grouting material for reinforcing and strengthening the concrete used underwater is applicable to repairing of the concrete used underwater, can be used for repairing and reinforcing the concrete used underwater and is especially applicable to repairing and reinforcing of an underwater pier column.

Description

technical field [0001] The invention relates to a reinforcing and reinforcing grouting material, in particular to a grouting material for reinforcing and strengthening underwater concrete, and is especially suitable for repairing and strengthening underwater pier columns. Background technique [0002] Underwater repair technology plays an extremely important role in repairing the damage of underwater concrete buildings, and repair materials are a vital part of underwater repair technology. In some underwater structures such as dams and tunnels, due to irregular construction or improper operation and maintenance, coupled with the perennial erosion of river water or sea water, concrete defects are very common. Concrete defects will reduce the strength of concrete and shorten its service life. In severe cases, underwater buildings will be damaged, posing a huge threat to people's lives and property. Therefore, it is very important to repair the defects of concrete underwater bu...

Claims

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Application Information

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IPC IPC(8): C09J163/00C09J11/06C09J11/04
Inventor 陈历耿吴毅彬杨浩郑伟
Owner 上海颖川佳固信息工程股份有限公司
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