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Improvement in Engineering Properties of Mudstone in Southwestern Taiwan Through Compaction and a Cement Additive

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Abstract

This paper presents laboratory test investigating on engineering properties of non-treated- and treated-mudstone in southwestern Taiwan. Laboratory tests determine the physical properties, maximum dry unit weight, unconfined compressive strength, shear strength parameters on consolidated-undrained and unconsolidated-undrained triaxial tests. The native mudstone was only sieved to obtain the soil of which passed through US no. 4 standard sieve. For non-treated mudstone, six different levels of dry densities were prepared. Both CU and UU triaxial tests were also tested on specimens of which were prepared by three various dry densities. The test results showed that dry unit weight, compaction method, and soil particle remarkably improved on unconfined compression strength, and shear strength parameters. With respect to treated mudstone, the two different ratios (4, and 8%) of Portland cement admixture by weight were mixed with mudstone. Test results show that as cement was added, maximum dry unit weight decreased, and moisture content increased. The treated mudstone mixture behaved as a ductile material, and shear strength parameters were significantly improved. Finally, the test result also disclosed that Portland cement of 4% was the economical ratio for treated mudstone.

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Acknowledgements

The author wishes to thank Prof. Darn-Horng Hsiao for his invaluable assistance in completing this research. This help is gratefully acknowledged.

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  1. Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

    Vu To-Anh Phan

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  1. Vu To-Anh Phan
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Correspondence to Vu To-Anh Phan.

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Phan, V.TA. Improvement in Engineering Properties of Mudstone in Southwestern Taiwan Through Compaction and a Cement Additive. Geotech Geol Eng 36, 1833–1843 (2018). https://doi.org/10.1007/s10706-017-0435-1

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