Modified mica powder for mortar

A mica powder and modification technology, which is applied in the field of building materials, can solve the problems of reducing the crack resistance and crack resistance of mortar, and achieve the effects of improving crack resistance, increasing fracture energy, and accelerating curing and forming.

Active Publication Date: 2018-08-31
广州市东浦建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Mortar is a common building material. Mortar is a commonly used bonding material in construction. It is composed of a certain proportion of sand and cementing materials and water. At the same time, other ingredients are added to improve the comprehensive performance of the mortar. In the prior art, there are Apply mica to mortar to improve the strength of mortar. However, adding ordinary mica to mortar can improve the strength of mortar to a certain extent, but it will also bring some negative effects, especially reducing the crack resistance of mortar. performance, in order to solve this kind of problem, this application modified the mica, and then cooperated with other auxiliary components to further improve the strength effect of the mortar, while avoiding the reduction of the crack resistance of the mortar, and can effectively improve the crack resistance of the mortar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A modified mica powder for mortar, comprising the following steps:

[0024] (1) Pulping:

[0025] Disperse the mica powder evenly in deionized water to prepare a mica powder suspension with a mass concentration of 15%, then add 0.56% sodium hydroxymethylcellulose by mass to the mica powder suspension, heat and stir evenly to obtain a mixed slurry ;

[0026] (2) Refining:

[0027] Grind the mixed slurry prepared in step (1) by four-stage wet grinding method, wherein in the first-stage grinding, the flow rate of the slurry is 3.5t / h, and 0.25% of the mass of the mixed slurry is added with methylsilane before grinding , the grinding temperature is 42°C, and the grinding time is 55min; in the secondary grinding, the flow rate of the slurry is 4.5t / h, and 0.15% polyvinyl alcohol is added during the grinding process, the grinding temperature is 45°C, and the grinding The time is 80min; in the three-stage grinding, the flow rate of the slurry is 4.5t / h, and potassium persul...

Embodiment 2

[0039] A modified mica powder for mortar, comprising the following steps:

[0040] (1) Pulping:

[0041] Disperse the mica powder evenly in deionized water to prepare a mica powder suspension with a mass concentration of 20%, then add 0.60% of its mass sodium hydroxymethyl cellulose to the mica powder suspension, heat and stir evenly to obtain a mixed slurry ;

[0042] (2) Refining:

[0043]Grind the mixed slurry prepared in step (1) by using four-stage wet grinding method. In the first-stage grinding, the flow rate of the slurry is 3.5t / h, and add 0.3% methyl silane of the mixed slurry before grinding , the grinding temperature is 42°C, and the grinding time is 55min; in the secondary grinding, the flow rate of the slurry is 4.5t / h, and 0.25% polyvinyl alcohol is added during the grinding process, the grinding temperature is 45°C, and the grinding The time is 80min; in the three-stage grinding, the flow rate of the slurry is 4.5t / h, and potassium persulfate with a mass of ...

Embodiment 3

[0055] A modified mica powder for mortar, comprising the following steps:

[0056] (1) Pulping:

[0057] Disperse the mica powder evenly in deionized water to prepare a mica powder suspension with a mass concentration of 18%, then add 0.58% sodium hydroxymethylcellulose by mass to the mica powder suspension, heat and stir evenly to obtain a mixed slurry ;

[0058] (2) Refining:

[0059] Grind the mixed slurry prepared in step (1) by four-stage wet grinding method, wherein in the first-stage grinding, the flow rate of the slurry is 3.5t / h, and add 0.28% of the mass of the mixed slurry before grinding. , the grinding temperature is 42°C, and the grinding time is 55min; in the secondary grinding, the flow rate of the slurry is 4.5t / h, and 0.18% polyvinyl alcohol is added during the grinding process, the grinding temperature is 45°C, and the grinding The time is 80min; in the three-stage grinding, the flow rate of the slurry is 4.5t / h, and potassium persulfate with a mass of 0....

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PUM

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Abstract

The invention discloses modified mica powder for mortar and relates to the technical field of building materials. A preparation method comprises the following steps: (1) producing mortar; (2) grinding the mortar; (3) preparing modifying liquid; and (4) carrying out modification treatment. The modified mica powder used for the mortar has the advantages that the molecular structure of the mica powder is effectively improved, and the modified mica powder and hydroxybutyl starch are synergistic, so that crack resistance of the mortar can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a modified mica powder for mortar. Background technique [0002] Mica is a complex structure of hydrated potassium aluminosilicate or similar non-metallic minerals. There are many varieties, including muscovite, sericite, biotite, sodium mica, etc. Natural mica is commonly found in granite, pegmatite, etc. High chemical stability and heat resistance stability, not easy to be corroded by media such as acid and alkali. [0003] Mortar is a common building material. Mortar is a commonly used bonding material in construction. It is composed of a certain proportion of sand and cementing materials and water. At the same time, other ingredients are added to improve the comprehensive performance of the mortar. In the prior art, there are Apply mica to mortar to improve the strength of mortar. However, adding ordinary mica to mortar can improve the strength of mort...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/02C04B24/38C08B31/12
CPCC04B20/026C04B40/0046C08B31/12C04B20/023C04B14/042C04B24/38
Inventor 夏保峰程业泉夏俊
Owner 广州市东浦建材有限公司
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