|Table of Contents|

Review on improvement methods of desulfurization gypsum strength and water resistance(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年04期
Page:
95-106
Research Field:
建筑材料
Publishing date:

Info

Title:
Review on improvement methods of desulfurization gypsum strength and water resistance
Author(s):
HOU Yongli123 YANG Tao1
(1. School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China; 2. Inner Mongolia Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China; 3. Inner Mongolia Autonomous Region Building Inspection, Appraisal and Safety Assessment Engineering Technology Research Center, Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China)
Keywords:
desulfurization gypsum mineral admixture silicone waterproofing agent organic emulsion strength water resistance
PACS:
TU502
DOI:
10.19815/j.jace.2022.08079
Abstract:
The improvement methods and modification mechanism of desulfurization gypsum strength and water resistance were systematically summarized and analyzed. The effects of cement, various mineral admixtures, silicone waterproofing agents and other organic emulsions on the strength and water resistance of desulfurization gypsum and its composite cementitious materials were described in detail. The mechanism, advantages and disadvantages of various modification methods were discussed. The results show that adding appropriate amount of cement and mineral admixtures will produce hydraulic products, the strength and water resistance of desulfurization gypsum can be improved, but excessive addition will cause adverse effects. The ratio of cement, fly ash and desulfurization gypsum has a great influence on the strength and water resistance of the cementitious system. Silicone waterproofing agent can form a hydrophobic film on the surface of desulfurization gypsum, which can significantly improve the water resistance of desulfurization gypsum. When it is combined with mineral admixtures, better mechanical properties and water resistance can be obtained. Other types of organic waterproofing agents can improve the water resistance of desulfurization gypsum, but most of them will change the crystal morphology of desulfurization gypsum, which will adversely affect the strength and water resistance of desulfurization gypsum. At present, the modified materials of desulfurization gypsum are complex, and the comprehensive performance is not good when acting alone. More simple and effective modified materials and methods need to be further studied and discussed.

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Last Update: 2024-07-20