Role of curing temperature in progress of lime-soil reactions

Rao, Sudhakar M and Shivananda, P (2005) Role of curing temperature in progress of lime-soil reactions. In: Geotechnical and Geological Engineering, 23 (1). pp. 79-85.

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Abstract

An expansive black cotton soil was used to assess if ambient temperature influences the progress of lime-soil reactions. Lime-soil mixes containing lime additions above the Lime Modification Optimum (or Initial Consumption of Lime value) of the expansive black cotton soil was cured for periods ranging from 1 hour to 400 days at $25^0C$. The curing temperature of $25^0C$ is representative of mean temperatures occurring in semi-arid regions of Karnataka, India. The in situ progress of lime treatment was monitored by the use of electrical conductivity and pH measurements. The trend of decrease in conductivity and pH of the 4 and 7 lime-soil mixes suggested that pozzolanic activity commenced after 1 day of curing at $25^0C$. Comparatively, an earlier study by other researchers had reported that pozzolanic activity does not commence before 7 days of curing at $11.5^0C$ for lime additions above the Lime Modification Optimum value of swelling clay. Combining the results of studies at $25^0C$ and $11.5^0C$, it appears that higher ambient temperatures do accelerate the progress of lime-soil reactions.

Item Type:	Journal Article
Publication:	Geotechnical and Geological Engineering
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer
Keywords:	expansive clays;lime;pozzolanic activity;temperature
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	02 Jul 2008
Last Modified:	19 Sep 2010 04:38
URI:	http://eprints.iisc.ac.in/id/eprint/11133

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