硅酸盐通报2024，Vol.43Issue(6)：2186-2197,2205,13.
湿基α-半水石膏制备高强石膏制品研究
Preparation of High Strength Gypsum Product with Wet-Base α-Hemihydrous Gypsum
周明凯 1王潇 2高鹏 3王宇强3
作者信息
- 1. 武汉理工大学材料科学与工程学院,武汉 430070||武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070||长治市武理工工程技术研究院,长治 046011
- 2. 武汉理工大学材料科学与工程学院,武汉 430070
- 3. 长治市武理工工程技术研究院,长治 046011
- 折叠
摘要
Abstract
In order to produce high strength gypsum products from wet-base α-hemihydrous gypsum,the ideal preparation method was identified by analyzing the effects of aging time,grinding time,molding temperature and retarder content on setting time and strength of high strength gypsum.Additionally,scanning electron microscopy and X-ray diffraction were used to clarify how each aspect affected strength.The results show that longer aging period results in lower strength and shorter setting duration of gypsum.As the grinding time prolongs,the setting time of gypsum significantly shortens,and the strength of product increases first and then decreases.The higher the slurry temperature is,the longer the gypsum setting time is,and the lower the product strength is.The optimal preparation process is aging time of 5 min,grinding time of 20 s,and slurry temperature of 20 ℃.On this basis,adding 0.08％(mass fraction)retarder can effectively prolong the setting time of gypsum and improve the hardening strength.The prepared gypsum products have excellent performance,with a drying flexural strength of 14.1 MPa and a drying compressive strength of 58.3 MPa.The microscopic test results indicate that various process parameters can affect the compactness of the internal structure of gypsum and the growth and development of dihydrate gypsum crystals by changing the water content and hydration process of gypsum,ultimately affecting the hardening strength of product.关键词
湿基α-半水石膏/高强石膏制品/制备工艺/力学性能/凝结时间/标准稠度用水量/动态水热法Key words
wet-base α-hemihydrous gypsum/high strength gypsum product/preparation process/mechanical property/setting time/water requirement of normal consistency/dynamic hydrothermal method分类
化学化工引用本文复制引用
周明凯,王潇,高鹏,王宇强..湿基α-半水石膏制备高强石膏制品研究[J].硅酸盐通报,2024,43(6):2186-2197,2205,13.
