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Modified polyurethane/epoxy resin composite grouting cement mortar and preparation method thereof

A technology of epoxy resin and cement mortar, which is applied in the field of building materials, can solve problems such as easy cracking, application limitations, and large internal stress, and achieve good toughness and crack resistance, reduce maintenance costs, and increase toughness.

Inactive Publication Date: 2015-12-30
FUJIAN JIANGXIA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high crosslinking density and three-dimensional network structure of a single epoxy resin after curing, there are disadvantages such as large internal stress, brittleness, poor impact resistance, and easy cracking. It is difficult to meet the engineering technical requirements of concrete toughening, and its application is restricted certain restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Preparation of Modified Wood Fibers

[0037] 1) Add the dry wood powder to the high-speed mixer, stir at 80°C, and add the aluminate coupling agent of 2% of the weight of the wood powder in two times, the time interval between the two additions is 3 minutes, and then stir for 5 minutes after adding , to obtain activated wood powder;

[0038] 2) Take 200 parts by weight of activated wood flour and add it to 60 parts by weight of a coupling agent aqueous solution (add 0.5 parts by weight of a coupling agent to 80 parts by weight of water and stir until it is completely dissolved), and stir for 0.4 hours; Then heat to 61°C, stir for 6 hours; filter, put the filtered wood powder into the centrifuge at a speed of 500r / min, and take it out after centrifuging for 15 minutes;

[0039] 3) After taking out the wood powder, dry it in vacuum at 53°C for 24 hours, then cool it to 24°C; put the wood powder and 100 parts by weight of maleic anhydride graft copolymer into a high-sp...

Embodiment 2

[0055] 1. Preparation of Modified Wood Fibers

[0056] 1) Add the dry wood powder to the high-speed mixer, stir at 90°C, and add the aluminate coupling agent of 2% of the weight of the wood powder in two times, the time interval between the two additions is 4 minutes, and then stir for 6 minutes after adding , to obtain activated wood flour;

[0057] 2) Take 200 parts by weight of activated wood powder and add it to 80 parts by weight of a coupling agent aqueous solution (add 1 part by weight of coupling agent to 100 parts by weight of water and stir until it is completely dissolved), and stir for 0.4h ; then heated to 60°C, stirred for 8 hours; filtered, and the filtered wood powder was added to a centrifuge at a speed of 500r / min, centrifuged for 15 minutes and then taken out;

[0058] 3) After taking out the wood powder, dry it in vacuum at 55°C for 24 hours, then cool it to 28°C; put the wood powder and 150 parts by weight of maleic anhydride graft copolymer into a high-s...

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Abstract

The invention relates to modified polyurethane / epoxy resin composite grouting cement mortar and a preparation method thereof, belonging to the field of building materials. The mortar is prepared from the following components in parts by weight: 80 to 100 parts of cement, 120 to 180 parts of fine sand of 50 to 200 meshes, 20 to 50 parts of water, 4 to 7 parts of sodium silicate, 2 to 3 parts of aluminum sulfate, 1 to 2 parts of calcium chloride, 1 to 2 parts of sodium hydroxide, 10 to 15 parts of polyurethane modified epoxy resin toughening emulsion containing modified wood fiber, 1.5 to 6 parts of early strength agent and 0.9 to 2.4 parts of water reducing agent. On the basis of a modified polyurethane / epoxy resin composite material, the modified wood fiber is further compounded to facilitate the crack resistance of the grouting mortar, improve the toughness and reduce the later maintenance cost of engineering.

Description

technical field [0001] The invention relates to a modified polyurethane / epoxy resin composite grouting cement mortar and a preparation method thereof, belonging to the field of building materials. Background technique [0002] Ordinary mortar has a low tension-compression ratio, large dry shrinkage deformation, poor impermeability, crack resistance, corrosion resistance, and high density, so its application range is greatly restricted. With the development of industry, in order to further improve the performance of mortar, it is necessary to improve the performance of cementing materials, so polymer mortar appeared. Use polymers to modify cement mortar so that while maintaining the advantages of the original inorganic materials of cement, such as compressive strength, flexural strength, and aging resistance, organic materials with strong cohesive force, good deformability, and strong sealing are added. characteristics, so that the cohesive force, frost resistance and imperm...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B16/02
Inventor 蒋国平肖三霞
Owner FUJIAN JIANGXIA UNIV
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