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Epoxy resin emulsion modified cement-based patching material and preparation material thereof

A technology of epoxy resin emulsion and repair materials, which is applied in the field of epoxy resin emulsion modified cement-based repair materials and its preparation, and can solve the problems of rapid repair of unsuitable underwater concrete cracks, low bonding strength of the base layer, poor dispersion resistance, etc. problems, to achieve the effect of excellent mechanical properties, fast curing speed and strong chemical corrosion resistance

Inactive Publication Date: 2015-11-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing epoxy emulsion cement mortar is not suitable for rapid repair of underwater concrete cracks due to its long setting time underwater, poor underwater dispersion resistance, and low bonding strength with the base.

Method used

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  • Epoxy resin emulsion modified cement-based patching material and preparation material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 100 parts of sulphoaluminate cement, 10 parts of silica fume and 50 parts of quartz powder into the stirring pot, stir at a speed of 60r / min for 20-30s; then add 28 parts of water, 10 parts of epoxy resin emulsion, 5 1 part of water-based tackifying rosin resin emulsion and 0.5 part of water reducer, stirring at a speed of 60r / min for 60-80s; finally add 6 parts of water-based curing agent and 0.5 part of lithium carbonate, stirring at a speed of 60r / min for 20-30s , you can get epoxy resin emulsion modified cement-based repair material.

[0032] The initial setting and final setting time, 1d compressive strength and flexural strength, water-land strength ratio and underwater bonding flexural strength of the epoxy resin emulsion modified cement-based repair material were tested respectively. The initial setting and final setting time, 1d compressive strength and flexural strength test were carried out according to "Test Regulations for Polymer Modified Cement Mort...

Embodiment 2

[0037] An epoxy resin emulsion modified cement-based repair material, the distribution ratio of each component is calculated in parts by weight: 100 parts of sulfoaluminate cement, 25 parts of epoxy resin emulsion, 14 parts of water-based curing agent, 0.5 parts of lithium carbonate, 6 parts of water-based thickening rosin resin emulsion, 0.6 part of water reducer, 9 parts of silica fume, 45 parts of quartz powder and 23 parts of water, choose sulphoaluminate cement, epoxy resin emulsion, water-based curing agent, quick-setting agent (using lithium carbonate), water-based tackifying rosin resin emulsion, water reducing agent, silica fume, quartz powder and water;

[0038] The preparation method is the same as in Example 1. The performance test results are shown in Table 1.

Embodiment 3

[0040] An epoxy resin emulsion modified cement-based repair material, the distribution ratio of each component is calculated in parts by weight: 100 parts of sulfoaluminate cement, 35 parts of epoxy resin emulsion, 18 parts of water-based curing agent, 0.6 parts of lithium carbonate, 5 parts of water-based thickening rosin resin emulsion, 0.4 part of water reducer, 12 parts of silica fume, 55 parts of quartz powder and 14 parts of water, choose sulphoaluminate cement, epoxy resin emulsion, water-based curing agent, quick-setting agent (carbonic acid Lithium), water-based tackifying rosin resin emulsion, water reducing agent, silica fume, quartz powder and water;

[0041] The preparation method is the same as in Example 1. The performance test results are shown in Table 1.

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Abstract

The invention relates to an epoxy resin emulsion modified cement-based patching material and a preparation material thereof. The epoxy resin emulsion modified cement-based patching material is characterized by comprising the following raw materials in parts by weight: 100 parts of sulphate aluminum cement, 5 to 40 parts of epoxy resin emulsion, 5 to 20 parts of waterborne curing agent, 0.4 to 1.0 parts of accelerator, 2 to 10 parts of waterborne tackifier rosin resin emulsion, 0.2 to 1.0 parts of water reducer, 5 to 15 parts of silica fume, 40 to 60 parts of quartz powder and 10 to 30 parts of water. According to the epoxy resin emulsion modified cement-based patching material and the preparation material thereof disclosed by the invention, the sulphate aluminum cement and the accelerator are adopted so as to shorten the setting time of the patching material, therefore the underwater dispersion resistance of the patching material is improved; the mechanical property of the cement-based patching material and bonding strength between the cement-based patching material and a basement layer are improved by utilizing the epoxy resin emulsion; the prepared epoxy resin emulsion modified cement-based patching material has the characteristics of being short in setting time, high in underwater dispersion resistance, good in underwater bonding performance and the like, and can be used for concrete crack mending in underwater and humid environments.

Description

technical field [0001] The invention relates to an epoxy resin emulsion modified cement-based repair material and a preparation method thereof. Background technique [0002] Cement concrete has the advantages of high compressive strength, low cost, and convenient construction, and is widely used in civil engineering. However, under the action of internal and external factors, cement concrete will inevitably have cracks, and cracks are the main reason for the reduction of the bearing capacity, waterproof and durability of concrete structures. With the rapid development of the economy, there are more and more hydraulic structures such as reservoir dams, hydropower stations, water diversion projects and docks. Compared with general concrete buildings, cracks are more harmful to hydraulic concrete buildings. Due to the existence of cracks, leakage, chemical erosion, and freeze-thaw damage will occur in hydraulic concrete buildings, which will seriously reduce its function and ...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/72
Inventor 余剑英吴伟飞周吉徐松陈枭晏石林
Owner WUHAN UNIV OF TECH
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