Long-Term Effect of Curing Temperature on the Strength Behavior of Cement-Stabilized Clay
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 140, Issue 8
Abstract
The influence of curing temperature on the strength development of concrete, mortar, or cement-stabilized granular soils has been widely reported in the literature. However, there are fewer studies focusing on cement-stabilized clay. The key difference is the presence of pozzolanic reactions in cement-stabilized clay, which give rise to more complex strength-development behaviors than those of concrete, mortar, or cement-stabilized granular soils. This paper aims to clarify this difference using extensive data collected as part of a land reclamation project in Singapore. Five different mixes of cement-stabilized Singapore marine clay are cured under different temperatures. Their strength development with time is studied by testing the specimens under unconfined compression at various curing ages (up to 1 year). The experimental results show that a higher curing temperature gives rise to not only higher short-term strengths but also higher long-term/ultimate strengths. Based on the experimental results, a model is proposed that combines the maturity theory commonly used for concrete or mortar with a proposed temperature-enhanced strength factor, which takes into account the effect of curing temperature on pozzolanic reactions occurring in cement-stabilized clay. This proposed model is validated by another independent Singapore data set and data sets collected from the literature.
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Acknowledgments
This study was supported by the Building and Construction Authority of Singapore under the MND Research Fund on “Enhancing the Use of Unwanted Soils for Land Reclamation Purpose—Solving an Environmental Problem and Developing a Viable Alternate Fill.” The authors also acknowledge the invaluable cooperation and assistance offered by the Housing and Development Board and Surbana International Consultants Pte Ltd.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 140 • Issue 8 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 17, 2013
Accepted: Apr 14, 2014
Published online: May 9, 2014
Published in print: Aug 1, 2014
Discussion open until: Oct 9, 2014
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