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Modified epoxy mortar abrasion-resistant patching material

A technology of repairing materials and epoxy mortar, which is applied in the field of concrete anti-scouring repairing materials, can solve the problems of reducing the curing reaction speed, achieve the effects of reducing the curing reaction speed, avoiding corrosion resistance, and reducing the exothermic peak of the reaction

Active Publication Date: 2014-01-01
WUDA JUCHENG STRUCTURE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems in the prior art that the aggregate particle size is too large to affect the corrosion resistance and the curing reaction speed is too fast, and to provide a modification with moderate aggregate particle size and effective reduction of the curing reaction speed. Epoxy mortar anti-abrasion repair material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]A modified epoxy mortar abrasion-resistant repair material, the repair material includes A component, B component, and the weight ratio of A component to B component is 4: 1, the composition of the A component and Its weight ratio is: epoxy resin 20, toughening agent 2, reactive diluent 3, wear-resistant aggregate 75, the composition and weight ratio of the B component are: curing agent 24, coupling agent 1, Wear-resistant aggregate 75, wherein the curing agent is polyetheramine curing agent T-403, the wear-resistant aggregate is quartz sand graded aggregate, the particle size composition and weight ratio of the aggregate are 10- 20 mesh: 20~40 mesh: 40~70 mesh: 100~200 mesh=1:2:2:1, the epoxy resin is bisphenol A type E44 epoxy resin or bisphenol A type E51 epoxy resin, The toughening agent is liquid polysulfide rubber, liquid nitrile rubber or liquid styrene-butadiene rubber, and the reactive diluent is one of benzyl glycidyl ether, butyl glycidyl ether, allyl glycidyl...

Embodiment 2

[0047] The steps are the same as in Example 1, the difference is that the components of the A component and their weight ratios are: epoxy resin 15, toughening agent 1.5, reactive diluent 1.5, wear-resistant aggregate 82, the B group The components and their weight ratios are: curing agent 24, coupling agent 1, wear-resistant aggregate 75, wherein the wear-resistant aggregate is quartz sand graded aggregate, the particle size composition of the aggregate and its The weight ratio is 10-20 mesh: 20-40 mesh: 40-70 mesh = 1:2:1.

[0048] The prepared modified epoxy mortar anti-abrasion repair material was tested for mechanical properties referring to "Technical Regulations for Epoxy Mortar" DL / T5193-2004. The results showed that the tensile strength was ≥10.0MPa, the compressive strength was ≥90.0MPa, and the Bending strength ≥ 30.0MPa, bonded tensile strength with concrete ≥ 2.5MPa, abrasion strength 3.863h / (g / cm 2 ), impact strength 39.8MPa.

Embodiment 3

[0050] The steps are the same as in Example 1, the difference is that the components of the A component and their weight ratios are: epoxy resin 15, toughening agent 1.5, reactive diluent 1.5, wear-resistant aggregate 85, the B group The components and their weight ratios are: curing agent 18, coupling agent 1.5, wear-resistant aggregate 80.5, wherein the curing agent is polyetheramine curing agent D-230, and the wear-resistant aggregate is emery grade Aggregate, the particle size composition and weight ratio of the aggregate is 10-20 mesh: 20-40 mesh: 40-70 mesh = 1:1:2.

[0051] The prepared modified epoxy mortar anti-abrasion repair material was tested for mechanical properties referring to "Technical Regulations for Epoxy Mortar" DL / T5193-2004. The results showed that the tensile strength was ≥10.0MPa, the compressive strength was ≥90.0MPa, and the Bending strength ≥ 30.0MPa, bonded tensile strength with concrete ≥ 2.5MPa, abrasion strength 3.274h / (g / cm 2 ), impact streng...

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Abstract

The invention relates to a modified epoxy mortar abrasion-resistant patching material which comprises a component A and a component B. The mass ratio of the A component and the B component is 4:1. The A component comprises, by weight, 15-20 parts of epoxy resin, 1.5-2 parts of flexibilizer, 1.5-3 parts of reactive diluent and 75-82 parts of abrasive aggregates. The B component comprises, by weight, 18-24 parts of hardening agent, 1-1.5 parts of coupling agent and 75-80 parts of abrasive aggregates. The abrasive aggregates are quartz-sand-class aggregates or diamond-sand-class aggregates. The mass ratio of aggregates with the particle diameter of 10-20 meshes to aggregates with the particle diameter of 20-40 meshes to aggreates with the particel diameter of 40-70 to aggreates with the particel diameter of 100-200 meshes is 0-1 to 1-2 to 0-2 to 0-1. The hardening agent is a polyether amine hardening agent. According to the modified epoxy mortar abrasion-resistant patching material, the abrasion-resistant strength and the anti-impact strength are improved, the hardening reaction speed is lowered and micro cracks in the early stage of epoxy mortar are avoided.

Description

technical field [0001] The invention relates to a concrete anti-scour repair material, in particular to a modified epoxy mortar anti-scour repair material, which is suitable for improving the anti-scour and impact strength of the epoxy mortar. Background technique [0002] In recent years, with the implementation of the development strategy of western development and power transmission from west to east, a number of large-scale high-head power stations have been built in my country. Abrasion damage to the concrete on the flow surface of hydraulic structures is a difficult problem in the construction and operation of hydropower projects. The scouring wear and cavitation effect of high-speed sandy water on the flow surface of hydraulic concrete buildings will lead to large-scale erosion of surface concrete, and serious catastrophic accidents, so it has always been paid attention to. Higher requirements are put forward for anti-abrasion materials, such as crack resistance, anti...

Claims

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Application Information

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IPC IPC(8): C04B26/14
Inventor 万雄卫徐盈李北星肖皓邱富源
Owner WUDA JUCHENG STRUCTURE CO LTD
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