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Mortar fine powder and preparation method thereof

A technology of fine powder and mortar, applied in the field of fine powder of mortar and its preparation, can solve the problems of low strength and poor crack resistance of building mortar, and achieve the effects of reducing the influence of natural environment, good workability and improving utilization rate

Active Publication Date: 2014-04-09
湖南瑞吉达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that in the prior art, the amount of limestone powder added in the preparation process of mortar fine powder is greater than 85wt%, especially greater than 95wt%. In order to solve the problem of poor performance, a kind of mortar fine powder is provided. The amount of limestone powder added in the mortar fine powder is greater than 95wt%. At the same time, when the mortar fine powder is used in building mortar, it can also improve the strength of building mortar, crack resistance and reduce costs.

Method used

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  • Mortar fine powder and preparation method thereof

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Effect test

Embodiment 1

[0028] The mortar fine powder A described in this embodiment includes the following components: 9.7 kg of limestone powder with a particle diameter of 120 mesh, 0.1 kg of water-repellent silane-based powder, 0.1 kg of hydroxypropyl methylcellulose with a particle diameter of 80 mesh, and 0.05 kg of anionic polyacrylamide with a diameter of 200 mesh and a weight average molecular weight of 4 million.

[0029] The preparation method of mortar fine powder described in the present embodiment, comprises the steps:

[0030] (1) Add a specific amount of water repellent to a specific amount of limestone powder and mix evenly;

[0031] (2) Mix a specific amount of polyacrylamide and cellulose evenly;

[0032] (3) Add the homogeneously mixed substance in the step (2) to the homogeneously mixed mixture in the step (1), and stir evenly to prepare a fine mortar powder.

Embodiment 2

[0034] The mortar fine powder B described in this embodiment includes the following components: 9.8 kg of limestone powder with a particle diameter of 170 mesh, 0.08 kg of water-repellent silane-based powder, 0.04 kg of hydroxypropyl methylcellulose with a particle diameter of 120 mesh, and 0.04 kg of anionic polyacrylamide with a diameter of 170 mesh and a weight average molecular weight of 8 million.

[0035] The preparation method of mortar fine powder described in the present embodiment, comprises the steps:

[0036] (1) Add a specific amount of water repellent to a specific amount of limestone powder and mix evenly;

[0037] (2) Mix a specific amount of polyacrylamide and cellulose evenly;

[0038] (3) Add the homogeneously mixed substance in the step (2) to the homogeneously mixed mixture in the step (1), and stir evenly to prepare a fine mortar powder.

Embodiment 3

[0040] The mortar fine powder C described in this embodiment comprises the following components: 9.9 kg of limestone powder with a particle diameter of 200 mesh, 0.05 kg of calcium stearate, 0.01 kg of hydroxyethyl cellulose with a particle diameter of 170 mesh, and a particle diameter of 120 mesh , 0.01 kg of anionic polyacrylamide with a weight average molecular weight of 12 million.

[0041] The preparation method of mortar fine powder described in the present embodiment, comprises the steps:

[0042] (1) Add a specific amount of water repellent to a specific amount of limestone powder and mix evenly;

[0043] (2) Mix a specific amount of polyacrylamide and cellulose evenly;

[0044] (3) Add the homogeneously mixed substance in the step (2) to the homogeneously mixed mixture in the step (1), and stir evenly to prepare a fine mortar powder.

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Abstract

The invention provides a mortar fine powder and a preparation method thereof, and belongs to the field of building materials. The mortar fine powder comprises the following compositions in parts by weight: 97-99.9 parts of limestone powder, 0.03-1 part of a water repellent, 0.03-1 part of cellulose, 0.0-0.5 part of polyacrylamide and 0.02-0.5 part of an air entraining agent. When the mortar fine powder is used as building mortar, the building mortar not only has the advantages of good workability, but also is improved in compressive strength and reduced in cracking resistance. Performance tests show that the building mortar modified by the mortar fine powder is improved in 28-day compressive strength by 5%, improved in caking ability by 20% and reduced in shrinking percentage by 30%.

Description

technical field [0001] The invention relates to a mortar fine powder and a preparation method thereof, belonging to the field of building materials. Background technique [0002] The building mortar used in masonry and plastering construction is made by mixing cementitious materials such as cement and fine aggregates such as sand with water. Due to the low design strength level of construction mortar (M2.5-M10), the amount of cement used in the preparation is small, and the ratio of cement to sand is generally 1:5-11. Due to the small amount of cement added, the construction The workability and constructability of the mortar are poor, and it is easy to crack or even peel off after being applied, which seriously affects the construction quality. In order to improve the workability of construction mortar, the measure of adding lime plaster has been widely used in construction engineering for a long time to improve the workability and constructability of mortar, but lime plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B22/06
Inventor 邹雄文邹学辉朱建和
Owner 湖南瑞吉达科技有限公司
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