Machine-spraying-type plastering gypsum mortar and preparation technology thereof

A technique for plastering gypsum and mortar, which is applied in the field of new machine-spraying plastering gypsum mortar, can solve the problems that the water retention effect does not satisfy mechanical spraying construction, cannot be made into dry powder mortar, and is difficult to mechanized construction, etc., and achieves increased thixotropy and sag resistance. Good adhesion, good adhesion and shortening the construction period

Active Publication Date: 2015-10-07
新疆荣高鸿骏新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, the emulsion in the additive is liquid, and the others are powder, which cannot be made into dry powder mortar, and it is not easy to carry out mechanized construction; and the water retention effect may not meet the requirements of mechanical spraying construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Formula: 200g of natural gypsum, 30g of 42.5-grade high-strength, fast-setting, rapid-hardening, high-belite sulfate cement, 650g of river sand, 120g of heavy calcium powder, 2.75g of Yilaitai MP2050 redispersible latex, with a viscosity of 100,000 mPa· 3g of hydroxypropyl methylcellulose ether of s, 0.25g of sodium rosinate air-entraining agent, 5g of expanded perlite, 0.3g of DH-B gypsum retarder produced by Linyi Yida Chemical Industry, and 200g of water. The specific surface area of ​​the gypsum is 300m 2 / kg; the cement specific surface area is 350m 2 / kg.

[0031] Preparation steps: (1) Firstly, redispersible latex powder, hydroxypropyl methylcellulose ether, air-entraining agent, expanded perlite, and gypsum retarder are uniformly mixed to obtain a mixed additive.

[0032] (2) Through the metering device, the dry gypsum, fine aggregate, heavy calcium powder, cement and the additives mixed in (1) are mixed evenly according to the mass ratio.

[0033] (3) Add 21...

example 2

[0038] Formula: 300g of natural gypsum, 10g of 42.5 grade high-strength fast-setting rapid-hardening high-belitite sulfate cement, 550g of river sand, 160g of heavy calcium powder, 4g of Yilaitai MP2050 redispersible latex, with a viscosity of 50,000 mPa·s 4g of hydroxypropyl methylcellulose ether, 0.2g of sodium rosinate air-entraining agent, 10g of expanded perlite, 0.45g of DH-B gypsum retarder produced by Linyi Yida Chemical Industry, and 266g of water.

[0039] Preparation steps: (1) Firstly, redispersible latex powder, hydroxypropyl methylcellulose ether, air-entraining agent, expanded perlite, and gypsum retarder are uniformly mixed to obtain a mixed additive.

[0040] (2) Through the metering device, the dry gypsum, fine aggregate, heavy calcium powder, cement and the additives mixed in (1) are mixed evenly according to the mass ratio.

[0041] (3) Add 266 g of water to the dry-mixed mortar mixed uniformly in (2) to obtain a machine-sprayable plastering gypsum mortar. ...

example 3

[0047] Formula: 400g of desulfurized gypsum, 10g of 42.5-grade high-strength, fast-setting, fast-hardening, high-belite sulfate cement, 520g of river sand, 80g of heavy calcium powder, 4g of Yilaitai MP2050 redispersible latex, with a viscosity of 150,000 mPa·s 2g of hydroxypropyl methylcellulose ether, 0.15g of sodium rosinate air-entraining agent, 5g of expanded perlite, 0.6g of DH-B gypsum retarder produced by Linyi Yida Chemical Industry, and 300g of water.

[0048] Preparation steps: (1) Firstly, redispersible latex powder, hydroxypropyl methylcellulose ether, air-entraining agent, expanded perlite, and gypsum retarder are uniformly mixed to obtain a mixed additive.

[0049] (2) Through the metering device, the dry gypsum, fine aggregate, heavy calcium powder, cement and the additives mixed in (1) are mixed evenly according to the mass ratio.

[0050](3) Add 300g of water to the dry-mixed mortar mixed uniformly in (2) to obtain machine-sprayable plastering gypsum mortar. ...

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Abstract

The invention relates to machine-spraying-type plastering gypsum and a preparation technology thereof and belongs to the technical field of building materials. The machine-spraying-type plastering gypsum is characterized by being prepared from the following raw materials: 200-400 parts of gypsum, 10-60 parts of cement, 520-650 parts of fine aggregate, 80-160 parts of heavy calcium powder, 2-4 parts of redispersible emulsion powder, 2-4 parts of hydroxypropyl methyl cellulose ether, 0.15-0.25 part of an air entraining agent, 5-10 parts of expanded perlite, 0.3-0.8 part of a gypsum retarder and 200-300 parts of water. The machine-spraying-type plastering gypsum is applicable to being directly sprayed to a wall surface by adopting a mortar spraying machine, both time and labour are saved, construction efficiency can be improved, and cost is reduced; bonding performance with the wall surface is good, rebounce is not caused, anti-sagging performance is good, both bonding strength and compressive strength can meet requirements, and cracking of a wall body can be reduced; and usage amount of gypsum is low, and cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a novel machine-sprayed plastering gypsum mortar. Background technique [0002] Gypsum plastering mortar is applied to the interior walls of buildings. It has good working performance, small shrinkage, and is not easy to crack. It also has good moisture drainage and moisture absorption, and can regulate indoor humidity. However, in the construction process, mainly hand plastering. Pure manual plastering is labor-intensive, low in efficiency, and construction quality is unstable. At the same time, due to the increase in labor costs and the shortage of professional bricklayers in recent years, construction costs have continued to increase. Our country has imported mortar spraying machines from abroad. Mechanical spraying of gypsum mortar can greatly improve construction efficiency and reduce labor costs, but ordinary gypsum mortar is difficult to meet the pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B24/38
Inventor 兰明章刘鹏飞张晓然王剑锋崔素萍王子明毛倩瑾王亚丽
Owner 新疆荣高鸿骏新材料技术有限公司
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