Degradable efficient gypsum retarder as well as preparation method and application thereof

A gypsum retarder and retarder technology, which can be used in climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor phosphogypsum retarder effect and gypsum retarder not being green and environmentally friendly. , to achieve good retardation effect and excellent application performance.

Active Publication Date: 2021-03-16
河北协同化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the current gypsum retarder does not have the performance of environmental protection and has poor retarding effect in phosphogypsum, the present invention provides a degradable high-efficiency gypsum retarder and its preparation method and application

Method used

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  • Degradable efficient gypsum retarder as well as preparation method and application thereof
  • Degradable efficient gypsum retarder as well as preparation method and application thereof
  • Degradable efficient gypsum retarder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This example provides a degradable high-efficiency gypsum retarder, which is compounded by calcium polyaspartate and tetrasodium iminodisuccinate with a mass ratio of 25:1.5. Its preparation method is:

[0021] Calcium polyaspartate is made into the calcium polyaspartate aqueous solution of 40% by mass fraction, and the massfraction of tetrasodium iminodisuccinate in the tetrasodium iminodisuccinate aqueous solution is 33%, and the obtained polyaspartate The aqueous solution of calcium partate and the aqueous solution of tetrasodium iminodisuccinate are mixed evenly at 35-45°C according to the mass ratio of 100:7.27, and then spray-dried with a spray drying tower, and the temperature inside the tower is controlled at 110-130°C. Pass the dried product through a 60-mesh sieve.

Embodiment 2

[0023] This example provides a degradable high-efficiency gypsum retarder, which is compounded by calcium polyaspartate and tetrasodium iminodisuccinate with a mass ratio of 25:1. Its preparation method is:

[0024] Calcium polyaspartate is made into the calcium polyaspartate aqueous solution of 40% by mass fraction, and the massfraction of tetrasodium iminodisuccinate in the tetrasodium iminodisuccinate aqueous solution is 33%, and the obtained polyaspartate The aqueous solution of calcium aspartate and the aqueous solution of tetrasodium iminodisuccinate are mixed evenly at 35-45°C at a mass ratio of 100:4.85, and then spray-dried with a spray drying tower, and the temperature inside the tower is controlled at 110-130°C. Pass the dried product through a 60-mesh sieve.

Embodiment 3

[0026] This example provides a degradable high-efficiency gypsum retarder, which is compounded by calcium polyaspartate and tetrasodium iminodisuccinate with a mass ratio of 25:2. Its preparation method is:

[0027] Calcium polyaspartate is made into the calcium polyaspartate aqueous solution of 40% by mass fraction, and the massfraction of tetrasodium iminodisuccinate in the tetrasodium iminodisuccinate aqueous solution is 33%, and the obtained polyaspartate The aqueous solution of calcium aspartate and the aqueous solution of tetrasodium iminodisuccinate are mixed evenly at 35-45°C according to the mass ratio of 100:9.70, and then spray-dried by a spray drying tower, and the temperature inside the tower is controlled at 110-130°C. Pass the dried product through a 60-mesh sieve.

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Abstract

The invention belongs to the technical field of gypsum building materials, and particularly relates to a degradable efficient gypsum retarder as well as a preparation method and application thereof. The degradable efficient gypsum retarder is prepared by compounding polyaspartic acid calcium and tetrasodium iminodisuccinate in a specific ratio, so that the green and environment-friendly propertiesare guaranteed, and the degradable efficient gypsum retarder has an excellent high-efficiency retarding effect. The preparation method comprises the following steps: respectively preparing polyaspartic acid calcium and tetrasodium iminodisuccinate into aqueous solutions with specific concentrations, mixing, and drying, so that the polyaspartic acid calcium and the tetrasodium iminodisuccinate possibly form a chelate with a specific spatial configuration; the obtained finished product has an excellent retarding effect when applied to desulfurized gypsum and phosphogypsum, and the strength performance of gypsum cannot be obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of gypsum building materials, and in particular relates to a degradable high-efficiency gypsum retarder and its preparation method and application. Background technique [0002] Gypsum comes from the by-products of desulfurization industry and phosphorus industry. It is cheap. Its application in plastering mortar can effectively alleviate the cracking problem of cement mortar. It has good construction performance and is quite popular in the market. In recent years, its application in the field of building materials has achieved great success. Huge progress. [0003] Gypsum reacts with water to solidify and harden. During the construction process, it is necessary to add gypsum retarder to adjust its setting time. There are many types of gypsum retarders commonly used in the market, mainly organic acids (citric acid, tartaric acid, etc.) and their soluble salts, alkaline phosphate, hydrolyzed protein, etc. O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C04B103/22
CPCC04B40/0046C04B2103/22C04B40/0042C04B24/123C04B24/28C04B28/143C04B28/144Y02W30/91
Inventor 吴学强于雪松焦永康成梦昭
Owner 河北协同化学有限公司
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