White wall veneer mortar prepared by calcium carbide slag

A technology of facing mortar and calcium carbide slag, which is applied in the field of white facing mortar and facing mortar, which can solve the problems of easy cracking, lower mortar fluidity, and high price, so as to improve crack resistance, reduce production cost, and have good flexibility sexual effect

Active Publication Date: 2018-09-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional wall facing mortar in China mostly uses cement as the main inorganic cementitious material, which is prone to problems such as cracking during application
In order to solve these problems, researchers usually introduce a large amount of redispersible latex powder into the finishing mortar to improve flexibility, but the price of redispersible latex powder is relatively high, resulting in high cost of finishing mortar; Adding a proper amount of fiber to improve the flexibility of the mortar, but the fiber will reduce the fluidity of the mortar and increase the difficulty of construction, which hinders the promotion and use of the wall mortar

Method used

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  • White wall veneer mortar prepared by calcium carbide slag
  • White wall veneer mortar prepared by calcium carbide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A white wall facing mortar is composed of the following raw materials in parts by weight: 58 parts of carbide slag, 24 parts of high belite sulfoaluminate cement, 10 parts of heavy calcium powder, 8 parts of vinyl acetate-ethylene copolymer latex powder, 200 parts of quartz sand, 0.4 parts of Dow Corning organic silicon powder water repellent SHP50, 0.1 part of boric acid, 0.1 part of high-efficiency polycarboxylate superplasticizer C900, 50 parts of wet calcium carbide slag water content and added water.

[0018] According to the ratio of raw materials, the dry powder raw materials are firstly mixed evenly to prepare dry components. Then, add the hydrous calcium carbide slag and appropriate amount of water into the mixing pot, then add the dry ingredients, and stir evenly. The performance indicators of the facing mortar are shown in the table below:

[0019]

[0020] Note: The performance test methods in the table refer to JC / T 1024-2007 "Wall Finishing Mortar".

Embodiment 2

[0022] A white wall facing mortar is composed of the following raw materials in parts by weight: 67 parts of carbide slag, 18 parts of high belite sulfoaluminate cement, 5 parts of heavy calcium powder, 10 parts of vinyl acetate-ethylene copolymer latex powder, 250 parts of quartz sand, 0.3 parts of Dow Corning organic silicon powder water repellent SHP50, 0.1 part of boric acid, 0.1 part of high-efficiency polycarboxylate superplasticizer C900, 53 parts of wet calcium carbide slag water content and added water.

[0023] The preparation method of facing mortar described in the present embodiment is identical with embodiment 1, and its performance index is as shown in the following table:

[0024]

[0025] Note: The performance test methods in the table refer to JC / T 1024-2007 "Wall Finishing Mortar".

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Abstract

The invention provides a white wall veneer mortar prepared by calcium carbide slag. The mortar is prepared from the calcium carbide slag, white cement, coarse whiting, quartz sand, redispersible powder and other admixtures. The veneer mortar adopts the calcium carbide slag as a gel material, which is of great significance for reducing the environmental pollution of industrial waste residues and reducing the production cost. In addition, high-belite-sulphoaluminate cement is hydrated to generate expanded ettringite, which is beneficial to improve the crack resistance of the veneer mortar. The veneer mortar has excellent flexibility, flexural strength, compressive strength, gas permeability and the like, and is suitable for the decoration of a building wall.

Description

technical field [0001] The invention relates to a decorative mortar for walls, in particular to a white decorative mortar with calcium carbide slag and white cement as cementitious materials, belonging to the field of building materials. Background technique [0002] The main component of carbide slag is Ca(OH) 2 , is a by-product of the hydrolysis of calcium carbide to prepare acetylene, which belongs to industrial waste. Due to the large output, high water content and strong alkalinity of calcium carbide slag, if it is not recycled, it will be stacked and dried for a long time, which will occupy a large amount of land resources. At the same time, it can also make the soil and water alkaline, causing serious environmental pollution. [0003] At present, the main method of comprehensive recycling of calcium carbide slag in my country is to produce cement. However, calcium carbide slag needs to be dried before use, which consumes a lot of energy. [0004] On the other han...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10
CPCC04B28/10C04B2201/10C04B2201/50C04B7/32C04B14/28C04B24/2623C04B14/06C04B24/42C04B22/082C04B24/24C04B22/002
Inventor 兰明章聂松王剑锋张巧伟
Owner BEIJING UNIV OF TECH
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