In situ tomographic investigation on the early hydration behaviors of cementing systems

被引：39
作者：
Gastaldi, D. [1 ]
Canonico, F. [1 ]
Capelli, L. [1 ]
Boccaleri, E. [2 ]
Milanesio, M. [2 ]
Palin, L. [2 ]
Croce, G. [2 ]
Marone, F. [3 ]
Mader, K. [3 ]
Stampanoni, M. [3 ,4 ,5 ]
机构：
[1] Buzzi Unicem SpA, I-15033 Casale Monferrato, AL, Italy
[2] Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15121 Alessandria, Italy
[3] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
[4] Univ Zurich, Inst Biomed Engn, CH-8092 Zurich, Switzerland
[5] ETH, CH-8092 Zurich, Switzerland
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 29卷
关键词：
Cement hydration; Sulfoaluminate cement; In situ tomography; Microstructure; Linear attenuation coefficient; X-RAY MICROTOMOGRAPHY; MICROSTRUCTURE; IMAGE;
D O I：
10.1016/j.conbuildmat.2011.10.016
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The early hydration of three cementing materials has been investigated in situ by Synchrotron X-ray Tomographic Microscopy thanks to an automatic sample exchanger recently integrated at the TOMCAT beamline at the Swiss Light Source in Villigen (CH). Hydration has been investigated by following the three dimensional evolution of pastes up to 12 h, with particular attention to the consumption of anhydrous phases, the formation of hydrates and to changes in microstructure. A lecture key for the interpretation of the tomographic images is proposed, based on the relationship between the linear attenuation coefficient mu-function of the density and elemental composition of each mineral phase- and the corresponding grey tone experimentally observed. Some examples of application of the technique are proposed, such as: a comparison among the reaction kinetics of the three investigated cements, the study of morphological evolution of mineral phases, the analyses of the three-dimensional evolution of the pore network. (C) 2011 Elsevier Ltd. All rights reserved.
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收藏
页码：284 / 290
页数：7
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