Water-resistant light gypsum mortar

A gypsum mortar, lightweight technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., to achieve the effect of increased strength, good water resistance, and light bulk density

Inactive Publication Date: 2021-04-09
GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the current problems of high cost and water resistance of lightweight gypsum mortar, the present invention provides a water-resistant lightweight gypsum mortar, using slag as aggregate for lightweight gypsum mortar, adding active substances at the same time, reducing the amount of gypsum powder, and increasing the product machinery. Strength, solve the water resistance problem of lightweight gypsum mortar, and reduce the preparation cost of lightweight gypsum mortar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A water-resistant lightweight gypsum mortar, comprising the following raw materials in parts by mass: 500 kg of building gypsum powder, 400 kg of mineral powder, 500 kg of slag, 50 kg of cement, 40 kg of organic soil, 10 kg of sulphoaluminate cement, 2 kg of hydroxypropyl methylcellulose, Protein retarder 1kg, magnesium aluminum silicate 2kg.

[0023] Further, the building gypsum powder is β-type hemihydrate gypsum, the fineness of the building gypsum powder (residue on 120 mesh sieve) ≤ 5%, the content of anhydrite ≤ 5%, the initial setting time ≥ 3min, and the final setting Time ≤ 30min, 2h flexural strength ≥ 3MPa, 2h compressive strength ≥ 6MPa, chloride ion content ≤ 500ppm.

[0024] Further, the β-type hemihydrate gypsum is prepared from dihydrate gypsum through drying, calcining, ball milling, aging and other processes, and dihydrate gypsum is natural gypsum or industrial by-product gypsum, wherein industrial by-product gypsum is phosphogypsum , desulfurization ...

Embodiment 2

[0029] A water-resistant lightweight gypsum mortar, including the following raw materials in parts by mass: 500 kg of building gypsum powder, 450 kg of mineral powder, 600 kg of slag, 80 kg of cement, 20 kg of aluminate cement, 3 kg of hydroxypropyl methylcellulose, 1 kg of citric acid, and Silica 1kg, organic soil 5kg.

[0030] Further, the building gypsum powder is β-type hemihydrate gypsum, the fineness of the building gypsum powder (residue on 120 mesh sieve) ≤ 5%, the content of anhydrite ≤ 5%, the initial setting time ≥ 3min, and the final setting Time ≤ 30min, 2h flexural strength ≥ 3MPa, 2h compressive strength ≥ 6MPa, chloride ion content ≤ 500ppm.

[0031] Further, the β-type hemihydrate gypsum is prepared from dihydrate gypsum through processes such as drying, calcining, ball milling, and aging. Dihydrate gypsum is natural gypsum or industrial by-product gypsum, wherein industrial by-product gypsum is phosphogypsum , desulfurization gypsum, fluorine gypsum, titaniu...

Embodiment 3

[0036] A water-resistant lightweight gypsum mortar, comprising the following raw materials in parts by mass: 500kg of construction gypsum powder, 500kg of mineral powder, 700kg of slag, 100kg of cement, 30kg of calcium formate, 1kg of hydroxypropyl methylcellulose, 1kg of protein retarder, Hydrogenated castor oil 3kg, organic soil 3kg.

[0037] Further, the building gypsum powder is β-type hemihydrate gypsum, the fineness of the building gypsum powder (residue on 120 mesh sieve) ≤ 5%, the content of anhydrite ≤ 5%, the initial setting time ≥ 3min, and the final setting Time ≤ 30min, 2h flexural strength ≥ 3MPa, 2h compressive strength ≥ 6MPa, chloride ion content ≤ 500ppm.

[0038] Further, the β-type hemihydrate gypsum is prepared from dihydrate gypsum through processes such as drying, calcining, ball milling, and aging. Dihydrate gypsum is natural gypsum or industrial by-product gypsum, wherein industrial by-product gypsum is phosphogypsum , desulfurization gypsum, fluorine...

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Abstract

The invention relates to the field of building materials, in particular to water-resistant light gypsum mortar, which is prepared from the following raw materials in parts by mass: 40-50 parts of building gypsum powder, 40-50 parts of mineral powder, 50-80 parts of furnace slag, 5-10 parts of cement, 1-3 parts of early strength agent, 0.1-0.3 part of water-retaining agent, 0.1-0.3 part of retarder, 0.1-0.3 part of thixotropic agent and 0.3-0.5 part of organic soil. According to the water-resistant light gypsum mortar, slag is used for replacing traditional light aggregate such as vitrified micro bubbles and perlite, the physical property that the slag is high in mechanical strength is fully utilized, and the mechanical strength of the light gypsum mortar is improved; besides, the slag is a porous alkaline substance, is light in volume weight, has certain activity and can be subjected to a gelatinization reaction with the building gypsum powder in an alkaline environment, meanwhile, gypsum, the slag and cement can be subjected to a gelatinization reaction, and the mechanical strength of the light gypsum mortar is further improved.

Description

technical field [0001] The invention relates to the field of design building materials, in particular to a water-resistant lightweight gypsum mortar. Background technique [0002] Lightweight gypsum mortar, also known as lightweight plastering gypsum, is a new green and environmentally friendly plastering material that can replace traditional plastering plaster and cement-based plastering mortar. It has light weight, heat preservation, heat insulation, fire resistance, micro expansion, Humidity control and other characteristics effectively solve the problems of traditional cement mortar such as poor water retention, large dry shrinkage, hollowing and cracks in wall plastering, etc. However, due to the common problem of poor water resistance of lightweight gypsum mortar, its application range is limited. In addition, the raw materials such as gypsum powder and lightweight aggregate used in the existing preparation methods are expensive, and the production cost of lightweight ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/06C04B111/27C04B111/40
CPCC04B28/147C04B18/067C04B2111/27C04B2111/40C04B2201/20C04B2201/50C04B18/12C04B7/32C04B2103/14C04B2103/465C04B2103/22C04B22/08C04B22/06C04B24/08C04B24/405Y02W30/91
Inventor 赵凯亓熙王川行何伟发荀博
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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