Fluorgypsum-based plastering material as well as preparation method and application thereof

A gypsum-based, fluorine gypsum technology, applied in the field of building materials, can solve the problems of increasing the difficulty of the preparation process, long setting time, high fineness requirement of fluorine gypsum, etc. Effect

Inactive Publication Date: 2021-01-22
JIANGSU EFFUL SCIENCE AND TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plastering material has the advantages of high strength, stable volume, not easy to crack, quick setting at low temperature and no efflorescence, but its setting time is long, and the preparation process requires calcination, which increases the difficulty of the preparation process
[0005] CN109354477A discloses a fluorogypsum-based lightweight plastering mortar, the plastering mortar comprises by weight percentage: 75-85% of fluorogypsum, 8-15% of aggregate, 1-10% of activator, and 0.08-0.4% of water-retaining agent % and 0.04-0.1% of starch ether, which has the characteristics of high flexural and compressive strength, high bonding strength and stability, but its setting time is long, and the fineness of fluorogypsum is required to be high

Method used

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  • Fluorgypsum-based plastering material as well as preparation method and application thereof
  • Fluorgypsum-based plastering material as well as preparation method and application thereof
  • Fluorgypsum-based plastering material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] This embodiment provides a fluorogypsum-based plastering material. The fluorogypsum-based plastering material includes 5600 parts by weight of fluorogypsum, 2500 parts of β-type hemihydrate gypsum, 900 parts of hollow vitrified microspheres (100 μm), 300 parts of fly ash, 150 parts of potassium sulfate, 25 parts of starch ether and 200 parts of calcium oxide.

[0055] The preparation method comprises the following steps:

[0056] (1) transporting fluorinated gypsum to a roller ball mill for grinding to obtain fluorinated gypsum particles with a fineness of 150 mesh;

[0057] (2) Add fluorogypsum particles, β-type hemihydrate gypsum, hollow vitrified microspheres, fly ash, potassium sulfate, starch ether and calcium oxide into the V-type mixer in proportion, and mix for 10 minutes to obtain fluorogypsum-based plastering material;

[0058] Wherein, the pH of the fluorogypsum raw material is 1.5, and after the raw materials are mixed in proportion, the pH of the fluorogy...

Embodiment 2

[0060] This embodiment provides a fluorogypsum-based plastering material. The fluorogypsum-based plastering material includes 6300 parts by weight of fluorogypsum, 2000 parts of β-type hemihydrate gypsum, 700 parts of hollow vitrified microspheres (100 μm), 350 parts of silica fume, 150 parts of activator (mixed potassium sulfoaluminate, sulfoaluminate cement and calcium sulfate dihydrate at a mass ratio of 5:5:1), 25 parts of starch ether and 125 parts of calcium oxide.

[0061] The preparation method comprises the following steps:

[0062] (1) transporting fluorinated gypsum to a roller ball mill for grinding to obtain fluorinated gypsum particles with a fineness of 150 mesh;

[0063] (2) Fluorogypsum particles, β-type hemihydrate gypsum, hollow vitrified microspheres, silica fume, activator (potassium sulfoaluminate, sulfoaluminate cement and calcium sulfate dihydrate in a mass ratio of 5:5) :1 mixed), starch ether and calcium oxide were added into a V-type mixer, and mixe...

Embodiment 3

[0066] This embodiment provides a fluorogypsum-based plastering material. The fluorogypsum-based plastering material includes 6100 parts by weight of fluorogypsum, 2200 parts of β-type hemihydrate gypsum, 700 parts of hollow vitrified microspheres (300 μm), 350 parts of Portland cement, 150 parts of activator (mixing potassium sulfoaluminate, sulfoaluminate cement, calcium sulfate dihydrate and potassium sulfate at a mass ratio of 25:25:5:3), water-retaining thickener (made by mixing starch ether and magnesium aluminum silicate at a mass ratio of 1:1) 25 parts and 150 parts of calcium oxide.

[0067] The preparation method comprises the following steps:

[0068] (1) Grinding the fluorinated gypsum to a roller ball mill to obtain fluorinated gypsum particles with a fineness of 400 meshes;

[0069] (2) Fluorogypsum particles, β-type hemihydrate gypsum, hollow vitrified microspheres, Portland cement, activator (potassium sulfoaluminate, sulfoaluminate cement, calcium sulfate dih...

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Abstract

The invention provides a fluorgypsum-based plastering material as well as a preparation method and application thereof. The fluorgypsum-based plastering material is prepared from fluorgypsum, an admixture, aggregate, an expansion inhibitor, an excitant, a water retention thickener and an acid-base regulator. The preparation method comprises the following steps: crushing fluorgypsum to obtain fluorgypsum particles; and mixing the fluorgypsum particles with the admixture, the aggregate, the expansion inhibitor, the excitant, the water retention thickener and the acid-base regulator to obtain thefluorgypsum-based plastering material. The fluorgypsum-based plastering material has the characteristics of short setting time, high strength, small stacking density, good volume stability, high bonding strength, excellent water-retaining property and the like; the preparation method is simple, and the fluorgypsum-based plastering material has a wide application prospect in the field of preparation of building materials.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a fluorogypsum-based plastering material and a preparation method and application thereof. Background technique [0002] Fluorogypsum is a by-product of sulfuric acid hydrolysis of fluorite to produce hydrofluoric acid. The main component is type II anhydrous calcium sulfate, which is strongly acidic. At present, most of fluorogypsum is directly discarded as solid waste, which not only occupies land resources and pollute the environment. To solve this problem, waste fluorogypsum is often used in the prior art to prepare plastering materials with high added value, which can not only make full use of waste resources, but also protect the environment. [0003] At present, the main method for preparing fluorogypsum-based plastering materials is: calcining and grinding fluorogypsum, adding additives such as activators, thickeners or aggregates, etc., and mixing evenly to obt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/147C04B2111/00017C04B2201/50C04B11/262C04B14/22C04B18/08C04B22/147C04B24/38C04B22/064C04B18/146C04B22/14C04B22/143C04B22/08
Inventor 丁鑫吴阳唐永波刘丽娟万建东
Owner JIANGSU EFFUL SCIENCE AND TECHNOLOGY CO LTD
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