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Application of nanoindentation to establish influence of heat on soils

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Title Application of nanoindentation to establish influence of heat on soils
 
Creator KADALI, S
SHARMA, S
SINGH, DN
 
Subject Nanoindentation
Hardness
Residual modulus
Sands
Fine-grained soils
Thermal energy
MECHANICAL-PROPERTIES
ELASTIC-MODULUS
INSTRUMENTED INDENTATION
SMALL VOLUMES
HARDNESS
SHALE
NANO
CONCRETE
BEHAVIOR
CREEP
 
Description In the scenario of rapid industrialization and infrastructural development, many situations are encountered where in soil like bentonite is subjected to elevated temperatures (about 200 degrees C). This may lead to alteration in the mechanical and engineering characteristics (such as hardness and residual modulus) of the soil. In this context, these characteristics can be quantified by measuring deformation of individual soil grains exposed to different elevated temperatures, by employing nanoindentation. With this in view, an attempt was made to explore the potential of this technique, normally used for material characterization by material scientists to study heat induced alteration in mechanical and engineering characteristics of the metals, to study the behavior of soils when they get exposed to elevated temperatures. As such, soils of entirely different characteristics were exposed up to 200 degrees C (in steps of 50 degrees C), nanoindentation studies were conducted on the residues and the results are reported in this technical note. It has been observed that there is a significant change in the hardness, residual modulus and resistance to indentation of the soils due to their exposure to elevated temperatures. It has also been demonstrated that the effect of elevated temperature is more pronounced on fine-grained soils as compared to coarse-grained soils. (C) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-10-16T12:17:34Z
2014-10-16T12:17:34Z
2013
 
Type Article
 
Identifier ENGINEERING GEOLOGY, 16214-21
http://dx.doi.org/10.1016/j.enggeo.2013.05.004
http://dspace.library.iitb.ac.in/jspui/handle/100/15525
 
Language en