Effects of lime content and amelioration period in double lime application on the strength of lime treated expansive sub-grade soils

Gallage, Chaminda, Cochrane, Melanie, & Ramanujam, Jothi (2012) Effects of lime content and amelioration period in double lime application on the strength of lime treated expansive sub-grade soils. In Miura, Seiichi, Ishikawa, Tatsuya, Yoshida, Nobuyuki, Hisari, Yoshio, & Abe, Nagato (Eds.) Proceedings of the 2nd International Conference on Transportation Geotechniques, Taylor and Francis Group, Hokkaido University, Sapporo, Japan, pp. 99-104.

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Abstract

The addition of lime into soils has been widely used to stabilize the expansive sub-grade soils when the road pavements are constructed on them. It is common practice to apply a half of the required lime amount and allow a certain time period for lime to react with soils (Amelioration period) before applying the rest of lime and compacting the sub-grade. The optimum amelioration period is essential to minimize the construction delay and to gain the higher strength. In this study, two different expansive soils procured from two different locations in the state of Queensland in Australia were first mixed with different lime contents. A soil mixed with a particular lime content was compacted at different amelioration periods (e.g.: 0, 6, 12, 18, 24 hrs) to obtain soil samples to measure the Unconfined Compressive Strength (UCS). The results suggested that for a given amelioration period, UCS increased with the increase in lime content. The optimum amelioration period could be within 14~17 hours for most of the lime contents in tested soils. This could suggest that the current 24-48 hour amelioration period specified by the Queensland Department of Transport and Main roads could be reduced.

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ID Code: 54430
Item Type: Conference Paper
Refereed: Yes
Keywords: Lime Content, Soils, Amelioration Period, Unconfirmed Compressive Strength
ISBN: 9780415621359
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Taylor & Francis
Deposited On: 13 Mar 2013 04:35
Last Modified: 04 Sep 2013 09:35

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