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Creep Characteristics of Mudstone According to Stress Level and Water Content  

Lee, Younghuy (영남대학교 건설시스템공학과)
Jeong, Ghangbok ((주)도담이앤씨종합건축사사무소)
Publication Information
Journal of the Korean GEO-environmental Society / v.13, no.3, 2012 , pp. 39-51 More about this Journal
Abstract
The time-dependent characteristics of mudstone in this study were analyzed by performing creep tests for the mudstone in Pohang. The creep tests were conducted on various boundary conditions to observe the time-dependent behavior of mudstone and the results were compared with values predicted by established visco-elastic model and empirical equations. As a result of analysis for empirical equations proposed by Griggs(1936), Cottrell(1952) and Singh(1975), the creep constants generally tend to increase as increasing the stress level and water content. Moreover, the values predicted by Singh's equation were well fitted for the test results. Therefore, it is expected to be reasonable that creep behavior of mudstone is analyzed using Singh's equation. As a result of analysis for a Burger's model, the predicted values were well fitted for the test results. Therefore, it is expected be reasonable that the creep behavior of mudstone by a rheological model is analyzed using Burger's model.
Keywords
Time-dependent characteristics; Creep constant; Burger's model; Mudstone;
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