Effective void ratio for assessing the mechanical properties of cement-clay admixtures at high water content
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Publication Details
Author list: Jongpradist P., Youwai S., Jaturapitakkul C.
Publisher: American Society of Civil Engineers
Publication year: 2011
Journal: Journal of Geotechnical and Geoenvironmental Engineering (1090-0241)
Volume number: 137
Issue number: 6
Start page: 621
End page: 627
Number of pages: 7
ISSN: 1090-0241
eISSN: 1943-5606
Languages: English-Great Britain (EN-GB)
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Abstract
Portland cement is widely used for the improvement of soft clay in many applications and construction methods. Because of the high initial water content of in situ soft clay, the additional water in the cement slurry to be mixed, and the added air in some applications, the mixtures have a high water content and void ratio in either almost-saturated or unsaturated conditions. The mechanical properties of cement-clay admixtures-including cement-treated clay and air-cement-treated clay-are affected by several parameters, e.g., mixing proportions, curing time, and the initial state of the mixture. To facilitate engineering decisions regarding mixing design and the development of a constitutive model, a single parameter that can characterize the mechanical properties of such mixed materials is advantageous. This paper recommends a parameter defined as the effective void ratio that could appropriately quantify the dependency of the mechanical properties of cement-clay admixtures on the influencing parameters on the basis of the results of unconfined compression, oedometer, and triaxial tests. The proposed parameter tends to capture the mechanical characteristics of cement-clay admixtures under different test conditions. ฉ 2011 American Society of Civil Engineers.
Keywords
Clays, Lightweight, void ratio, Water content
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