High pressure behaviour of tobermorite supergroup minerals: An in situ synchrotron X-ray powder diffraction study

被引：6

作者：

Polisi, Michelangelo ^{[1
]}

Vezzalini, M. Giovanna ^{[1
]}

Bonaccorsi, Elena ^{[2
]}

Biagioni, Cristian ^{[2
]}

Arletti, Rossella ^{[1
]}

机构：

[1] Univ Modena & Reggio Emilia, Dipartimento Sci Chim & Geol, Via Campi 103, I-40125 Modena, Italy

[2] Univ Pisa, Dipartimento Sci Terra, Via S Maria 53, I-56126 Pisa, Italy

来源：

CEMENT AND CONCRETE RESEARCH | 2020年 / 138卷

关键词：

Tobermorite; Compressibility; X-ray powder diffraction; Equation of state; High pressure; C-S-H; MECHANICAL-PROPERTIES; ELASTIC PROPERTIES; CRYSTAL-STRUCTURE; REAL STRUCTURE; OD CHARACTER; CLINOTOBERMORITE; ANGSTROM;

D O I：

10.1016/j.cemconres.2020.106249

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The high-pressure behaviour of two natural samples of kenotobermorite [Ca4Si6O15(OH)(2)center dot 5H(2)O] and clinotobermorite [Ca5Si6O17 center dot 5H(2)O] has been studied by in situ synchrotron X-ray powder diffraction. The samples were compressed in silicone oil using a diamond anvil cell. The calculated bulk moduli are as following: kenotobermorite K-0 = 83.2 +/- 0.4 GPa and clinotobermorite K-0 = 93.5 +/- 0.8 GPa. The presence of "zeolitic" Ca in clinotobermorite induces a lower compressibility in this sample. The comparison of the current results with previous studies evidenced that experimentally determined bulk moduli are generally higher than those obtained by theoretical calculations and the differences are related to the configuration of the silicate chains as well as to the content of "zeolitic" cations and H2O molecules.

引用

页数：9

共 46 条

[1] Equations of state [J].