Alternative Approaches for the Laboratory Evaluation of Moisture Susceptibility of Cement Stabilized Materials
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Authors
Rashidi, Mohammad
Ashtiani, Reza S.
Issue Date
2019-07
Type
Other
Language
en_US
Keywords
Alternative Title
Abstract
Moisture ingress significantly influences the serviceability and longevity of the transportation infrastructure. Moisture intrusion can give rise to the early development of distresses by creating pumping effect in granular layers and reducing the orthogonal load bearing capacity of pavement foundations. Traditionally, the tube suction test (TST) has been used to characterize the affinity of the unbound and stabilized aggregate systems to hold and transport moisture. There are several systematic errors associated with the characterization of the moisture susceptibility of granular layers using the TST test. This was the motivation to explore alternative approaches to mitigate such anomalies and refine the laboratory mixture design process of cement treated granular soils. Therefore, several alternative moisture susceptibility tests such as submergence and back pressure saturation tests in conjunction with routine mechanical tests were incorporated in this study to identify the affinity of granular layers to hold and transport moisture. To better characterize the influence of aggregate type and mineralogy upon moisture intrusion, several virgin and reclaimed aggregate systems and subgrade materials were incorporated in this study. Based on the laboratory achieved data, the back pressure saturation tests at different durations were able to detect early onset of damage in the cement stabilized materials in an efficient and timely manner. Therefore, the back pressure saturation test can be a viable option in lieu of traditional TST to efficiently characterize the damages imparted by prolong inundation situations such as storm-related flooding during natural disasters.
Description
Conference Paper.
Citation
Rashidi, Mohammad & Ashtiani, Reza. (2019). Alternative Approaches for the Laboratory Evaluation of Moisture Susceptibility of Cement Stabilized Materials. 447-459. 10.1061/9780784482469.045.
Publisher
ASCE