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Gypsum powder for construction

A technology for gypsum powder and construction, applied in the field of gypsum powder for construction, can solve the problems of low compressive strength and poor dispersion performance of gypsum powder, and achieve the effects of improving hydration coagulation and mechanical properties, inhibiting crystal shape, and improving solubility

Inactive Publication Date: 2018-10-26
王敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the problems of low compressive strength and poor dispersibility of gypsum powder at present, a kind of gypsum powder for construction is provided

Method used

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  • Gypsum powder for construction

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Gypsum powder base material: Take anhydrite and activate it at 150°C for 20 minutes to obtain an activated product. Take the activated product and add FDN water reducer at a mass ratio of 100:1, and ball mill it for 40 minutes to obtain a ball milled product. In terms of parts by mass, take 100 parts of ball mill mixed base material, 3 parts of sodium oxalate, 1 part of potassium aluminum sulfate dodecahydrate, 1 part of sodium sulfate and 2 parts of alum to obtain a mixed base material, and then calcined at 200°C for 1 hour, cooled to room temperature, ground and pulverized through a 200-mesh sieve, and collected Sieve the particles to obtain the base material of gypsum powder.

[0030] Retarding active substance: dry the waste penicillin residue, crush it through a 100-mesh sieve, collect the sieved particles, take the sieved particles and add a sodium hydroxide solution with a concentration of 0.03mol / L at a mass ratio of 1:4, stir and mix for 20 minutes, Sonicate at 4...

Embodiment 2

[0035] Gypsum powder base material: Take anhydrite and activate it at 200°C for 30 minutes to obtain an activated product. Take the activated product and add FDN water reducer at a mass ratio of 200:3, and ball mill it for 50 minutes to obtain a ball milled product. In terms of parts by mass, take 200 parts of ball mill mixed base material, 5 parts of sodium oxalate, 3 parts of potassium aluminum sulfate dodecahydrate, 3 parts of sodium sulfate, and 4 parts of alum to obtain a mixed base material, and then calcined at 300°C for 3 hours, cooled to room temperature, ground and pulverized through a 200-mesh sieve, and collected Sieve the particles to obtain the base material of gypsum powder.

[0036] Retarding active substance: dry the waste penicillin residue, crush it through a 100-mesh sieve, collect the sieved particles, take the sieved particles and add a sodium hydroxide solution with a concentration of 0.03mol / L at a mass ratio of 3:7, stir and mix for 30 minutes, Sonicat...

Embodiment 3

[0041] Gypsum powder base material: Take anhydrite and activate it at 175°C for 25 minutes to obtain an activated product. Take the activated product and add FDN water reducer at a mass ratio of 150:2, and ball mill it for 45 minutes to obtain a ball milled product. In terms of parts by mass, take 150 parts of ball mill mixed base material, 4 parts of sodium oxalate, 2 parts of potassium aluminum sulfate dodecahydrate, 2 parts of sodium sulfate and 3 parts of alum to obtain a mixed base material, then calcined at 250°C for 2 hours, cooled to room temperature, ground and pulverized through a 200-mesh sieve, and collected Sieve the particles to obtain the base material of gypsum powder.

[0042] Retarding active substance: dry the waste penicillin residue, crush it through a 100-mesh sieve, collect the sieved particles, take the sieved particles and add a sodium hydroxide solution with a concentration of 0.03mol / L at a mass ratio of 2:6, stir and mix for 25 minutes, Sonicate at ...

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Abstract

The invention discloses gypsum powder for construction and belongs to the field of chemical industry. Acrylic acid and methyl acrylate are introduced and then sodium methallyl sulfonate and methyl alkenyl polyoxyethylene polypropylene oxide block ether are copolymerized; four components are combined, and a polycarboxylic acid macromolecular substance is formed through initiator polymerization; after the polymerization, the hydrophobicity of a molecule is enhanced through a polypropylene oxide group; the gypsum powder has foam inhibition and foam elimination effects to that the macromolecular branching degree of polycarboxylic acid is higher and the stability of a structure is enhanced; a polymer is added into the gypsum powder, and the strength of gypsum is enhanced through changing the porosity and average pore diameter of the later-period gypsum. The problems of current gypsum powder that the compression strength is low and the dispersion performance is poor are solved.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a kind of gypsum powder for construction. Background technique [0002] The application of gypsum has a long history, but it was simply used to make chalk, putty, tofu and simple handicrafts in the early stage, lacking in-depth research and development, so it has not attracted people's attention. In the late 1970s, the demand for gypsum in construction, building materials and other related industries that consumed a lot of gypsum increased sharply, and gypsum attracted more and more attention. In recent years, along with the development of the gypsum products industry, various gypsum powders for different purposes have been promoted one after another, especially in the building materials industry. A tight product in the market. [0003] There are many processes for the production of building gypsum powder. According to the heating method, it can be divided into indirect heatin...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B11/00
CPCC04B11/00C04B11/005C04B28/14C04B2201/50C04B18/18C04B22/062C04B22/16C04B24/06C04B24/32C04B16/0633C04B14/46
Inventor 王敏路芸胡晓玉
Owner 王敏
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