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Fluorgypsum-based repair mortar

A technology for repairing mortar and fluorine gypsum, applied in the field of building materials, can solve the problems of poor weather resistance of organic caulks, large shrinkage of cement-based materials, low strength of semi-aqueous gypsum, etc., so as to improve water resistance and tensile bond strength. High, avoid anti-alkali and surface yellowing effect

Active Publication Date: 2017-08-18
湖南昌迅科技环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic caulking agents have poor weather resistance, short service life, and are not fire-resistant; while cement mortar cannot meet the requirements of this application scenario because of its low bond strength and poor flexibility
The semi-water-based gypsum used for caulking and repairing of existing houses has low strength, poor water resistance, and narrow application range; cement-based materials have large shrinkage, low bond strength, and cracks and hollowing are prone to occur; while cement mortar has a large thickness It takes multiple fillings to achieve the effect

Method used

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  • Fluorgypsum-based repair mortar
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  • Fluorgypsum-based repair mortar

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of fluorine gypsum-based repairing mortar, including main ingredients and additives, in parts by mass, the main ingredients include the following components: 70 parts of fluorogypsum, 5 parts of Portland cement, 25 parts of aggregate; The agent includes the following components: 0.5 parts of sodium sulfate, 2 parts of alkaline earth metal oxides, 0.5 parts of polycarboxylic acid, 0.1 parts of polyvinyl alcohol, 0.5 parts of redispersible emulsion agent, and 0.4 parts of organic fluorine silicon protective agent.

[0032] Wherein, Portland cement is fly ash Portland cement, which is the active mineral admixture; the aggregate is 10 parts of 80-mesh quartz sand, 10 parts of 160-mesh quartz sand and 5 parts of 200-mesh quartz sand; Sodium sulfate is the activator; alkaline earth metal oxide is the coagulation regulator; polycarboxylic acid is the water reducer; polyvinyl alcohol is the water-retaining thickener; agent.

[0033] During preparation, add fluorinated g...

Embodiment 2

[0039] A kind of fluorine gypsum-based repair mortar, including main material and admixture, in parts by mass, the main material includes the following components: 50 parts of fluorine gypsum, 5 parts of Portland cement and 5 parts of blast furnace slag powder, aggregate 35 parts; the admixture includes the following components: 3 parts of potassium sulfate, 1 part of carbonate compound, 0.5 part of melamine, 0.5 part of polycarboxylic acid, 0.5 part of hydroxymethyl propyl cellulose, redispersible 1 part of latex agent, 0.2 part of silicate protective agent.

[0040] Wherein, the Portland cement is fly ash Portland cement, Portland cement and blast furnace slag powder are the active mineral admixture; the aggregate is 20 parts of 80 mesh quartz sand, 10 parts of 160 mesh quartz sand And 5 parts of 200 mesh quartz sand; Potassium sulfate is the activator; Carbonate compound is the coagulation regulator; Trimeric nitrile amine and polycarboxylic acid are the water reducing agen...

Embodiment 3

[0048] A fluorogypsum-based repair mortar, comprising main ingredients and admixtures, the main ingredients include the following components in parts by mass: 25 parts of fluorogypsum, 2 parts of Portland cement, 1 part of silica fume, blast furnace slag powder 7 parts, 65 parts of aggregate; the admixture includes the following components: 1 part of potassium aluminum sulfate, 2 parts of alkaline earth metal oxide, 1 part of carbonate compound, 0.5 part of benzene-based water reducer, 0.4 part of polyvinyl alcohol , 0.1 part of hydroxymethyl propyl cellulose, 1 part of redispersible emulsion agent, 0.3 part of organic fluorocarbon protective agent.

[0049] Wherein, the Portland cement is fly ash Portland cement, Portland cement, silica fume and blast furnace slag powder are the active mineral admixture; the aggregate is 20 parts of 80 mesh quartz sand, 20 parts of 160 mesh quartz sand and 15 parts of 200 mesh quartz sand; aluminum potassium sulfate is the activator; alkaline...

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Abstract

The invention discloses fluorgypsum-based repair mortar and belongs to the technical field of building materials. The fluorgypsum-based repair mortar is prepared from a main material and an admixture, wherein the main material is prepared from components in parts by mass as follows: 15-80 parts of fluorgypsum, 1-10 parts of an active mineral admixture and 20-75 parts of aggregate; the admixture is prepared from components in parts by mass as follows: 0.5-3 parts of an excitant, 0.5-3 parts of an adjusting admixture, 0.1-1 part of a water reducer, 0.05-0.5 parts of a water-retaining admixture, 0.1-1 part of a redispersible emulsion and 0.05-0.5 parts of a waterproof agent. The fluorgypsum-based repair mortar is formed by combining type-II anhydrous gypsum, the adjusting admixture and the active mineral admixture, and some compact aluminosilicate three-dimensional networks are added to gypsum crystals while the type-II anhydrous gypsum is rapidly and safely activated. The defects of low strength and poor water resistance of ordinary building gypsum materials are overcome while the advantages of good size stability, high stretching and bonding strength and the like of gypsum are reserved. Waste residues in the fluorine chemical industry are taken as main raw materials, environmental protection and waste utilization are realized, and the production cost of building materials is reduced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a fluorogypsum-based repair mortar. Background technique [0002] Fluorogypsum is a by-product of hydrofluoric acid produced by hydrofluoric acid hydrolysis of fluorite. It belongs to type II anhydrous gypsum and is strongly acidic. At present, most of the fluorogypsum in China is directly stored as solid waste, which not only occupies land resources, but also pollutes the environment. Today, with the increasing consumption of natural resources, using waste fluorogypsum to produce high value-added wall repair mortar can not only make full use of waste resources, but also protect the soil and groundwater environment. [0003] Most of the existing building enclosures are made of lightweight materials such as autoclaved aerated concrete and shale bricks. The deformation between them and the floor, beams and columns due to changes in air humidity and temperature will caus...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/27
CPCC04B28/142C04B2111/00017C04B2111/27C04B2201/50C04B7/02C04B14/02C04B22/147C04B22/064C04B24/24C04B24/2623C04B2103/0057C04B24/42
Inventor 蔡雪飞王果余旦蔡卓瑫朱旗郭小军廖文革胡敏
Owner 湖南昌迅科技环保股份有限公司
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