Ardealite-based self-leveling material

A gypsum-based, self-leveling technology, applied in the field of gypsum products, can solve the problem of high production cost and achieve the effects of high utilization rate, simple modification process and low energy consumption

Inactive Publication Date: 2013-09-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 200510120515.6 and Chinese patent 200510072440.9 are both gypsum-based self-leveling materials, but they use gypsum mineral powder, which fails to make full use of phosphogypsum raw materials; Gypsum, the production cost is high, the modification measure of phosphogypsum is calcined at 170℃±10℃ for 100-300min to make it completely dehydrated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Phosphogypsum-based self-leveling material, the weight ratio of each component is as follows:

[0021] 55 parts of modified phosphogypsum; 15 parts of α hemihydrate gypsum; 28 parts of fly ash, the particle size of fly ash is controlled between 0.08 and 0.12mm; 3 parts of redispersible latex powder, the redispersible latex The powder is a polymer powder made of ethylene and vinyl acetate as monomers; 0.1 part of citric acid; 0.5 part of FDN-C naphthalene-based water reducer; 0.1 part of methyl cellulose; 0.08 part of silicone oil; 0.2 part of rosin resin;

[0022] The modified phosphogypsum is granulated with calcium carbide slag and phosphogypsum after dewatering and sieving in a mass ratio of 1:0.5, stirred evenly, and dried in an anhydrous calcination process at a controlled temperature of 65°C. The drying time is 30 minutes, and the powder becomes a fine powder, which is passed through a sieve of 80-100 mesh.

[0023] Take the above raw materials and ...

Embodiment 2

[0024] Embodiment 2: Phosphogypsum-based self-leveling material, the weight percentage of each component is as follows:

[0025] 70 parts of modified phosphogypsum; 12 parts of α hemihydrate gypsum; 20 parts of fly ash whose particle size is controlled between 0.08 and 0.12 mm; 2 parts of redispersible latex powder; The powder is a polymer powder made of ethylene and vinyl acetate as monomers; 0.1 part of citric acid; 0.5 part of FDN-C naphthalene-based water reducer; 0.15 part of methyl cellulose; 0.08 part of silicone oil; share;

[0026] The modified phosphogypsum is granulated with calcium carbide slag and phosphogypsum after dewatering and sieving in a mass ratio of 1:0.8, stirred evenly, and dried in an anhydrous calcination process at a controlled temperature of 70°C. The drying time is 30 minutes, and the powder becomes a fine powder, which is passed through a sieve of 80-100 mesh.

[0027] Take the above raw materials and mix them to obtain a phosphogypsum-based sel...

Embodiment 3

[0028] Embodiment 3: Phosphogypsum-based self-leveling material, the weight percentage of each component is as follows:

[0029] 50 parts of modified phosphogypsum, 15 parts of α hemihydrate gypsum, 30 parts of fly ash, the particle size of fly ash is controlled between 0.08 and 0.12mm; 3 parts of redispersible latex powder, the redispersible latex The powder is a polymer powder made of ethylene and vinyl acetate as monomers; 0.15 parts of citric acid, 0.3 parts of PC-1016 polycarboxylate superplasticizer, 0.15 parts of methyl cellulose, high-carbon fatty alcohol polyoxyethylene ether nonionic 0.1 part of surfactant, 0.1 part of sodium dodecylbenzenesulfonate,

[0030] Among them: modified phosphogypsum is granulated with calcium carbide slag after crushing and phosphogypsum at a ratio of 1:0.3, stirred evenly, and dried in an anhydrous calcination process. The controlled temperature is 60°C, and the drying time is 25 minutes. For fine powder, pass it through a sieve of 80-10...

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Abstract

The invention relates to an ardealite-based self-leveling material. he ardealite-based self-leveling material consists of the following materials in parts by weight: 40-80 parts of modified ardealite, 6-15 parts of semi-hydrated gypsum, 20-30 parts of admixture, 1-4 parts of re-dispersible latex powder, 0.10-0.30 part of a retarder, 0.20-1.0 part of a water reducer, 0.10-0.25 part of a water-retaining agent, 0.06-0.15 part of an antifoaming agent and 0.10-0.40 part of an air entraining agent. The ardealite-based self-leveling material has the beneficial effects that firstly, the waste utilization rate is high; secondly, the modifying process of the ardealite is high and the energy consumption is low; and thirdly, the performances of the self-leveling gypsum are improved by virtue of a reasonable proportion of various wastes, for example, CSH (Calcium Silicate Hydrate) phase can be generated by ardealite, carbide slag and coal ashes, so that the water resistance is effectively improved. Therefore, the ardealite-based self-leveling material had dual characteristics of circulation economy and low-carbon economy, and can be extensively applied to an industrial building and a civil building.

Description

technical field [0001] The invention belongs to the field of gypsum products, and in particular relates to a phosphogypsum-based self-leveling material. Background technique [0002] Phosphogypsum is calcium sulfate dihydrate precipitate containing a small amount of undecomposed phosphate rock and free acid discharged from the production process of wet-process phosphoric acid. It is the most important industrial by-product in phosphorus chemical production. Normally, the production of 1 ton of P 2 o 5 It is necessary to discharge 4.5 to 5.5 tons of phosphogypsum. Phosphogypsum is gray or yellowish, with a pH between 2 and 4. Its chemical composition is complex, with dihydrate gypsum as the main component, and it also contains impurities such as sulfate, phosphate, fluoride, heavy metal manganese and cadmium. In recent years, the discharge of phosphogypsum in my country has been increasing day by day. Due to long-term open-air stacking, PO in phosphogypsum 4 3- , SO 4 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/30
CPCY02W30/91
Inventor 蹇守卫郅真真马保国茹晓红卢斯文李玉博
Owner WUHAN UNIV OF TECH
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