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Gypsum-based colored facing mortar and preparation method thereof

A colored finishing mortar and gypsum-based technology, which is applied in the field of building decoration materials, can solve problems such as efflorescence of the facing mortar, and achieve the effects of good durability, improved physical properties, and light weight

Pending Publication Date: 2022-04-12
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a brand-new gypsum-based colored finishing mortar, which effectively solves the problem that the existing facing mortar is prone to efflorescence, and the colored facing mortar has no whitening, No cracking, high strength, light weight, waterproof, breathable, good durability, rich colors and shapes, etc.

Method used

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  • Gypsum-based colored facing mortar and preparation method thereof
  • Gypsum-based colored facing mortar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The raw materials used in the gypsum-based colored decorative mortar are as follows by weight: 20 parts of gypsum, 8 parts of aluminate cement, 2 parts of Portland cement, 4 parts of fly ash, 70 parts of quartz sand, 5 parts of additives, 1 part of pigment, The water-cement ratio is 0.66 (the mass ratio of water to the total mass of gypsum, aluminate cement and Portland cement is 0.66).

[0035] Among them, the ratio of redispersible latex powder, water-retaining agent, defoamer, waterproofing agent, and water-reducing agent in the additive is 2:0.15:0.1:0.5:0.6.

[0036] The dispersed latex powder is hydrophobic latex powder and is ethylene-vinyl chloride-vinyl laurate ternary copolymer latex powder.

[0037] The water-retaining agent is hydroxypropyl methylcellulose ether, and its viscosity is 40000mPa·s; the defoamer is silicone defoamer; Sulfonated melamine water reducer; gypsum is hemihydrate gypsum, whiteness ≥ 85%, particle size ≥ 200 mesh; aluminate cement is C...

Embodiment 2

[0043] The difference between the components of Example 2 and Example 1 is that the raw materials used in the gypsum-based colored decorative mortar are as follows in terms of mass ratio and weight: 20 parts of gypsum, 5 parts of aluminate cement, 1 part of Portland cement, 1 part of fly ash, 75 parts of quartz sand, 3 parts of additives, 0.5 parts of pigment, water-cement ratio 0.6.

[0044] Among them, the ratio of redispersible latex powder, water retaining agent, defoamer, water repellent, and water reducing agent in the additive is 4:0.1:0.05:0.2:0.5.

[0045] The dispersed latex powder is hydrophobic latex powder and is ethylene-vinyl acetate copolymer latex powder;

[0046]The water-retaining agent is hydroxyethyl methylcellulose ether with a viscosity of 10000mPa·s; the defoamer is polyether defoamer; the water-repellent is polysiloxane powder water-repellent with an effective content of ≥99%; Sodium sulfamate superplasticizer; gypsum is hemihydrate gypsum, whiteness ...

Embodiment 3

[0052] Embodiment 3 has the same components as in Embodiment 1. The difference is that the raw materials used in the gypsum-based colored facing mortar are as follows in parts by mass: 25 parts of gypsum, 10 parts of aluminate cement, 5 parts of Portland cement, 5 parts of fly ash, 80 parts of quartz sand, 6 parts of additives, 1 part of pigment, water-cement ratio 0.7.

[0053] Among them, the ratio of redispersible latex powder, water retaining agent, defoamer, water repellent, and water reducing agent in the additive is 5:0.2:0.15:0.5:1.

[0054] Dispersed latex powder is hydrophobic latex powder and is vinyl acetate-tertiary vinyl carbonate copolymerized latex powder;

[0055] The water-retaining agent is hydroxypropyl methylcellulose ether, and its viscosity is 40000mPa·s; the defoamer is silicone defoamer; Sulfonated melamine water reducer; gypsum is hemihydrate gypsum, whiteness ≥ 85%, particle size ≥ 200 mesh; aluminate cement is CA-60 aluminate cement; Portland cemen...

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Abstract

The invention discloses gypsum-based colored facing mortar and a preparation method thereof. The gypsum-based colored facing mortar comprises 20-25 parts of gypsum, 5-10 parts of aluminate cement, 0-5 parts of Portland cement, 1-5 parts of fly ash, 70-80 parts of quartz sand, 3-6 parts of an additive and 0.5-1.0 part of a pigment, wherein the addition amount of water is 60-70% of the total mass of the gypsum, the aluminate cement and the Portland cement. According to the gypsum-based colored facing mortar disclosed by the invention, the saltpetering of wall facing mortar is controlled, various properties are excellent, and the prepared saltpetering-resistant colored facing mortar has the characteristics of no whitening, no cracking, high strength, light weight, water resistance, air permeability, good durability, rich colors and shapes and the like in the use process; the paint is suitable for indoor or outdoor wall decoration of buildings. The gypsum-based colored facing mortar is simple to prepare and rich in raw material source, and can be industrially produced and used in a large scale.

Description

technical field [0001] The invention belongs to the field of building decoration materials, and in particular relates to a gypsum-based colored decorative mortar and a preparation method thereof. Background technique [0002] Facing mortar is a new type of wall decoration material, which is mainly composed of cementitious materials, aggregates, polymers, admixtures and pigments. It is a new type of wall decoration material. This decorative material has replaced paint, tiles, etc. in many countries for wall decoration, and has been widely used. However, the current Portland cement-based finishing mortar is prone to problems such as whitening and color difference, which seriously affect the aesthetics of the building wall, so it has not been popularized and applied. [0003] Patent CN 104045307 B discloses a facing mortar and its preparation method. The invention is composed of the following raw materials in parts by weight: 40-80 parts of aluminate cement, 1-30 parts of Port...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/34C04B111/82
Inventor 李清萍黄才芝杨秀丽崔恩田王翔吕梦莹雷定坤侯贵华
Owner YANCHENG INST OF TECH
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