The Mechanism of the First Hydration-Dehydration Cycle of Pure α- and β-CaSO4•0.5H2O
The Mechanism of the First Hydration-Dehydration Cycle of Pure α- and β-CaSO4•0.5H2O
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纯α-和β-CaSO4™0 5H2O 第一次水合-脱水循环的机理
DOI:
10.1155/2020/1732621
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发表时间:
2020
影响因子:
--
通讯作者:
Trettin
中科院分区:
文献类型:
--
作者:
Pritzel;Abu Zeitoun;Sakalli;Trettin
The objective of this research was to understand the dehydration mechanism of technical dihydrate and the variation of the physical properties ofβ‐hemihydrate after the first hydration‐dehydration process. In this study, the recycling mechanism of different hemihydrate types as raw material was investigated. The influence of the first hydration‐dehydration process on the hydration rate, microstructure, and mechanical properties of recycled hemihydrate were characterized by differential calorimetric analysis (DCA), calcium ion‐selective electrode (Ca2+‐ISE), conductivity, particle size distribution (PSD), scanning electron microscopy (SEM), and X‐ray diffraction (XRD). The results showed that the formed hemihydrate after the first hydration‐dehydration process differs in its properties than the unrecycled hemihydrate in some characteristics such as the morphological structure, number of surface, and side defects due to the grinding process after the first hydration step. In addition to the grinding step, the calcination process was responsible for increasing the number of defects on the crystal surface, which leads to a change in setting time and the microstructure of the recycled hemihydrate. Therefore, after the 1st reaction cycle ofβ‐HH, the compressive strength decreases due to a decrease in the hemihydrate crystal size, an increase in the surface area, and an increase in the amount of water required to perform the hydration reaction. The obtained hemihydrate after the first hydration‐dehydration process was inβform due to the applied calcination process after the first cycle.
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影响因子:
3.1
作者:
S. Inazumi;H. Sano;M. Yamada
通讯作者:
M. Yamada
DOI:
--
发表时间:
2023
期刊:
Revista de la Academia Colombiana de Ciencias Exactas Físicas y Naturales
影响因子:
--
作者:
I. Berdugo;E. Romero;M. Saaltink;María Albis
通讯作者:
María Albis
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
F. Wittman
通讯作者:
F. Wittman
影响因子:
8.6
作者:
Christensen, Axel Norlund;Olesen, Maja;Jensen, Torben R.
通讯作者:
Jensen, Torben R.
DOI:
--
发表时间:
2017
期刊:
Journal of Wuhan University of Technology-Mater. Sci. Ed.
影响因子:
--
作者:
Zhixin Li;J. Peng;Xingxing Qiu
通讯作者:
Xingxing Qiu