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Calcination-free desulfurized gypsum walling plastering dry-mixed mortar

A technology for desulfurized gypsum and dry-mixed mortar, applied in the field of building materials, can solve the problems of unfavorable industrial application, poor effect, high price, etc., and achieve the effects of low cost, reduction of secondary pollution, and improvement of performance

Active Publication Date: 2015-04-15
ZHEJIANG FANGYUAN BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mortar uses a large amount of dihydrate desulfurized gypsum, it does not need to be calcined, and the non-calcined desulfurized gypsum is directly applied to reduce secondary pollution. However, in order to improve the cohesiveness, the mortar needs to use expensive polymer resin powder. Silicone-modified ethylene-vinyl laurate-vinyl chloride copolymer has relatively high cost, which is not conducive to industrial application, and its application on walls has defects such as poor effect, low strength, and poor flatness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Calcination-free desulfurization gypsum wall plastering dry-mixed mortar of this embodiment, said dry-mixed mortar is mainly made of the following raw materials in parts by weight:

[0034] Calcination-free desulfurization gypsum: 20 parts; aggregate: 60 parts; water-retaining agent: 0.05 parts; gypsum modified material: 8 parts; the gypsum modified material is made of the following raw materials in parts by weight:

[0035] Wollastonite powder: 6-12 parts; early strength agent: 0.2-1.2 parts; superplasticizer: 0.1-1.0 parts; anti-cracking agent: 0.2-1.0 parts.

[0036] The above-mentioned dry-mixed mortar is prepared by the following method:

[0037] Weigh each raw material according to the above formula ratio, put it into a mixer and mix it evenly, and then pulverize it into a fine powder through a pulverizer to obtain a dry-mixed mortar for plastering a desulfurized gypsum wall without calcining.

[0038] When in use, the obtained dry-mixed mortar can be sprayed mec...

Embodiment 2

[0040] Calcination-free desulfurization gypsum wall plastering dry-mixed mortar of this embodiment, said dry-mixed mortar is mainly made of the following raw materials in parts by weight:

[0041] Calcination-free desulfurization gypsum: 40 parts; aggregate: 40 parts; water-retaining agent: 0.2 parts; gypsum modified material: 10 parts; the gypsum modified material is made of the following raw materials in parts by weight:

[0042] Wollastonite powder: 6 parts; early strength agent: 1.2 parts; superplasticizer: 1.0 parts; anti-cracking agent: 0.2 parts.

[0043] The above-mentioned dry-mixed mortar is prepared by the following method:

[0044] Weigh each raw material according to the above formula ratio, put it into a mixer and mix it evenly, and then pulverize it into a fine powder through a pulverizer to obtain a dry-mixed mortar for plastering a desulfurized gypsum wall without calcining.

[0045] When in use, the obtained dry-mixed mortar can be sprayed mechanically or ma...

Embodiment 3

[0047] Calcination-free desulfurization gypsum wall plastering dry-mixed mortar of this embodiment, said dry-mixed mortar is mainly made of the following raw materials in parts by weight:

[0048] Calcination-free desulfurization gypsum: 35 parts; aggregate: 50 parts; water-retaining agent: 0.15 parts; gypsum modified material: 15 parts; the gypsum modified material is made of the following raw materials in parts by weight:

[0049] Wollastonite powder: 12 parts; early strength agent: 0.2 parts; superplasticizer: 0.5 parts; anti-cracking agent: 0.5 parts.

[0050] The above-mentioned dry-mixed mortar is prepared by the following method:

[0051] Weigh each raw material according to the above formula ratio, put it into a mixer and mix it evenly, and then pulverize it into a fine powder through a pulverizer to obtain a dry-mixed mortar for plastering a desulfurized gypsum wall without calcining.

[0052] When in use, the obtained dry-mixed mortar can be sprayed mechanically or ...

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Abstract

The invention relates to a calcination-free desulfurized gypsum walling plastering dry-mixed mortar, belonging to the technical field of construction materials. In order to solve the technical problems of overhigh raw material cost, and poor binding property, poor thermal insulation property and low strength after being applied to walling in the mortar in the prior art, the invention provides a calcination-free desulfurized gypsum walling plastering dry-mixed mortar which is mainly prepared from 20-40 parts of calcination-free desulfurized gypsum, 30-60 parts of aggregate, 0.05-0.2 part of water retention agent and 8-15 parts of gypsum modifying material. The calcination-free desulfurized gypsum walling plastering dry-mixed mortar has the advantages of reasonable raw material proportioning and less secondary pollution, and also has the advantages of smooth and flat surface, strong binding force, low surface shrinkage / cracking / hollowing / shedding tendency, good aesthetic property and low thermal conductivity after being applied to walling.

Description

technical field [0001] The invention relates to a mortar, in particular to a calcined-free desulfurized gypsum wall plastering dry-mixed mortar, which belongs to the technical field of building materials. Background technique [0002] Wall (inner wall, outer wall) plastering dry-mixed mortar is an important part of construction engineering. The existing technology either directly uses natural hemihydrate gypsum as the main raw material, and also uses desulfurization product dihydrate gypsum (desulfurization gypsum) for calcining. It is made of semi-hydrated gypsum and ground, and then mixed with retarder, water-retaining agent and other raw materials. [0003] However, the storage capacity of the natural hemihydrate gypsum used in the above-mentioned wall plastering dry-mix mortar is also constantly decreasing, and natural resources are constantly scarce; in addition, desulfurization gypsum is a by-product of the coal-fired industry, which is produced by flue gas desulfuriza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 杨晓华苏君辉杨博缪文忠胡天富刘健朱国满
Owner ZHEJIANG FANGYUAN BUILDING MATERIALS TECH
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