Stability, hardening and porosity evolution during hydrothermal solidification of sepiolite clay
Stability, hardening and porosity evolution during hydrothermal solidification of sepiolite clay
复制标题
海泡石粘土水热固化过程中的稳定性、硬化和孔隙率演变
DOI:
10.1016/j.clay.2012.08.008
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发表时间:
2012-11
影响因子:
5.6
通讯作者:
Emile Hideki Ishida
中科院分区:
文献类型:
--
作者:
Lei Zhou;Zhenzi Jing;Yi Zhang;Ke Wu;Emile Hideki Ishida
Hydrothermal solidification of sepiolite clay was carried out at different curing temperatures (100°C and 200°C) with an introduction of calcium hydroxide. The addition of calcium hydroxide greatly affected the stability of sepiolite within sepiolite clay. When Ca/Si molar ratio (C/S) is lower than 0.4, sepiolite sustained well at both curing temperatures even for a long curing time (72h), and above C/S=0.4 sepiolite decomposed readily. During early-stage hydrothermal processing (before 12h), fine-grained particles of calcium silicate hydrate (CSH) gel precipitated and provided an early strength enhancement for the specimens solidified at 100°C and 200°C respectively. After that, fibrous CSH(I) that formed after 12h was responsible for the highest strength and platy tobermorite after 72h led to a slight decrease in strength at 200°C, while agglomerated sponge-like CSH gel formed after 72h contributed to the highest strength at 100°C. The intercrystalline pores of crystalline CSH, including CSH(I) and tobermorite, formed at 200°C provided more porosity than the gel pores at 100°C within solidified specimens.
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DOI:
10.1007/bf01913489
发表时间:
1991-07
期刊:
Journal of thermal analysis
影响因子:
--
作者:
U. Shuali;L. Bram;M. Steinberg;S. Yariv
通讯作者:
U. Shuali;L. Bram;M. Steinberg;S. Yariv
影响因子:
4.4
作者:
Yener, Nilguen;Onal, Mueserref;Sarikaya, Y.
通讯作者:
Sarikaya, Y.
影响因子:
1.5
作者:
S. Martínez-Ramírez;F. Puertas;M. Blanco-Varela
通讯作者:
S. Martínez-Ramírez;F. Puertas;M. Blanco-Varela
影响因子:
1.5
作者:
A. Singer;K. Stahr;M. Zarei
通讯作者:
A. Singer;K. Stahr;M. Zarei
影响因子:
1.1
作者:
Midori Takagi;H. Maeda;E. H. Ishida
通讯作者:
Midori Takagi;H. Maeda;E. H. Ishida