Cyclic Unconfined Compression Test of Cement-Treated Soils

This study presents the results of cyclic unconfined compression tests of cement-treated soil specimens prepared in a laboratory. Unconfined compression tests, in which a monotonic loading is applied to a specimen, are also conducted to evaluate the mean and variation of the unconfined compressive strength q_u of the prepared specimens. The cyclic loading tests provide the cyclic strength q_cyc versus the number of cycles to failure n_f plots, which is known as S-N curve. The ratio of q_cyc to q_u at prescribed cycles is evaluated on the basis of the S-N curve obtained as the sample regression line. Moreover the variance of linear regression is analyzed because there is a large scatter in the data on the S-N plots. The comparison of the variance of linear regression with that of q_u indicates that the variability of specimen strength results mainly in the variability in the data on the S-N plots.