Hydration of anhydrite of gypsum (CaSO{sub 4}.II) in a ball mill

Journal Article · Thu Mar 31 23:00:00 EST 2005 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2004.02.010· OSTI ID:20702128

Sievert, T; Wolter, A; Singh, N B

The hydration of an anhydrite of gypsum (CaSO{sub 4}.II) in a ball mill was studied as a function of time and temperature. The amount of gypsum formed at different intervals of time was determined by weight loss method and powder X-ray diffraction technique. Specific surface area at different time intervals was determined by LASER granulometric method. The results showed that the maximum rate of formation of gypsum was at a longer time than the time for the development of maximum specific surface area. In the presence of activators, the time for maximum rate of gypsum formation and maximum specific surface area shifted towards lower hydration time. Morphological changes during the course of hydration have been studied by the scanning electron microscopic (SEM) technique. A mechanism of hydration has been proposed.

• OSTI ID: 20702128
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 4 Vol. 35; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANHYDRITE
CALCIUM SULFATES
ELECTRON SCANNING
GYPSUM
HYDRATION
KINETICS
MORPHOLOGICAL CHANGES
SCANNING ELECTRON MICROSCOPY
SPECIFIC SURFACE AREA
TIME DEPENDENCE
X-RAY DIFFRACTION