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Low shrinkage mortar

A low-shrinkage, mortar technology, applied in the field of low-shrinkage mortar, can solve the problems of difficult to meet the rapid repair of the project, the wall decoration effect is deteriorated, the repair project duration is prolonged, etc., to achieve good thermal insulation effect, reduce shrinkage phenomenon, Guarantee the effect of quality of use

Inactive Publication Date: 2018-12-18
安徽省万帮新型建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional cement mortar will shrink greatly after hardening, and it is difficult to fill it densely when it is used for grouting. There are gaps between the material and the structure again, affecting the repair effect
In addition, when cement mortar is used as a repair material, it also has the disadvantages of slow setting and hardening and low early strength, which will prolong the construction period of the repair project and make it difficult to meet the needs of some projects for rapid repair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A low-shrinkage mortar, which contains 6.5% by mass of polytrimethylene carbonate modified kaolin and zeolite powder composite.

[0019] Further, the preparation method of polytrimethylene carbonate modified kaolin and zeolite powder composite includes the following steps: (1) kaolin pretreatment: mixing kaolin and catalyst into deionized water, stirring evenly, to obtain a mixed slurry , heated the mixed slurry to 86°C, then adjusted the pH of the mixed slurry to 8.6, then added 1.5% sodium bisulfite of the mixed slurry mass, continued heating to 90°C, stirred at 800r / min for 3 hours, and then filtered, using Wash with deionized water until neutral, dry to constant weight, and obtain pretreated kaolin;

[0020] (2) Zeolite powder pretreatment: add zeolite powder into the resistance furnace, calcinate at 750°C for 40min, then cool to 55°C, then add the cooled zeolite powder into hydrogen peroxide with a mass fraction of 30%, and stir for 10min Finally, add itaconic aci...

Embodiment 2

[0030] A low-shrinkage mortar, which contains 6.9% by mass of polytrimethylene carbonate modified kaolin and zeolite powder composite.

[0031] Further, the preparation method of polytrimethylene carbonate modified kaolin and zeolite powder composite includes the following steps: (1) kaolin pretreatment: mixing kaolin and catalyst into deionized water, stirring evenly, to obtain a mixed slurry , heated the mixed slurry to 86°C, then adjusted the pH of the mixed slurry to 8.6, then added 1.5% sodium bisulfite of the mixed slurry mass, continued heating to 90°C, stirred at 800r / min for 3 hours, and then filtered, using Wash with deionized water until neutral, dry to constant weight, and obtain pretreated kaolin;

[0032] (2) Zeolite powder pretreatment: add zeolite powder into the resistance furnace, calcinate at 750°C for 40min, then cool to 55°C, then add the cooled zeolite powder into hydrogen peroxide with a mass fraction of 30%, and stir for 10min Finally, add itaconic aci...

Embodiment 3

[0042] A kind of low-shrinkage mortar, containing 6.8% by mass of polytrimethylene carbonate modified kaolin and zeolite powder composite in the low-shrinkage mortar.

[0043]Further, the preparation method of polytrimethylene carbonate modified kaolin and zeolite powder composite includes the following steps: (1) kaolin pretreatment: mixing kaolin and catalyst into deionized water, stirring evenly, to obtain a mixed slurry , heated the mixed slurry to 86°C, then adjusted the pH of the mixed slurry to 8.6, then added 1.5% sodium bisulfite of the mixed slurry mass, continued heating to 90°C, stirred at 800r / min for 3 hours, and then filtered, using Wash with deionized water until neutral, dry to constant weight, and obtain pretreated kaolin;

[0044] (2) Zeolite powder pretreatment: add zeolite powder into the resistance furnace, calcinate at 750°C for 40min, then cool to 55°C, then add the cooled zeolite powder into hydrogen peroxide with a mass fraction of 30%, and stir for 1...

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Abstract

The invention discloses low shrinkage mortar, and relates to the technical field of building materials, wherein the low shrinkage mortar contains a polytrimethylene carbonate modified kaolin and zeolite powder complex with a mass of 6.5 to 6.9% of the mass of the low shrinkage mortar. The low shrinkage mortar has lower shrinkage and higher crack resistance.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a low-shrinkage mortar. Background technique [0002] As one of the commonly used materials in construction engineering, cement mortar can be used in the fields of foundation grouting, plastering, construction joint embedding, repair and reinforcement, and it can also be used for anchoring of large machinery and equipment. However, the traditional cement mortar will shrink greatly after hardening. It is difficult to fill and compact when used for grouting. It is prone to cracking and falling off when used for plastering, resulting in poor wall decoration effect. There are gaps between the material and the structure again, which affects the repair effect. In addition, when cement mortar is used as a repair material, it also has the disadvantages of slow setting and hardening and low early strength, which will prolong the construction period of the repair pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/06
CPCC04B28/04C04B20/068C04B2201/32C04B14/068C04B24/383C04B18/08C04B24/128C04B14/106C04B14/047C04B20/023
Inventor 郭胡健孙连军胡万伟
Owner 安徽省万帮新型建材科技有限公司
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