TY - JOUR AU - Muzamir Hasan, AU - Ieszaliana Ali, AU - Masayuki Hyodo, PY - 2019/05/12 Y2 - 2024/03/29 TI - STRENGTH OF SOFT CLAY REINFORCED WITH 10 MM SINGLE CRUSHED COCONUT SHELL (CCS) COLUMN JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 17 IS - 63 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/2604 SP - 353-359 AB - <p>Stone column can be used as a ground improvement technique where a portion of soft soil is<br>replaced with granular material such as stone or sand. The benefit of using stone columns in low strength soil<br>has been proven as an efficient method to improve the bearing capacity and reduce settlement of soft soils.<br>This study aims to investigate the improvement in shear strength of soft clay by embedded with a single crushed<br>coconut shell (CCS) column. The cost of soil improvement can be reduced because of CCS is a waste material.<br>This paper was done by determining the physical and mechanical properties of kaolin and CCS as well as the<br>effect of height penetration ratio of a single CCS column on shear strength characteristics. Unconfined<br>Compression Test (UCT) was conducted for 4 batch kaolin samples including a control sample in order to<br>determine the shear strength. Each batch involved four samples to find the accurate value. The research<br>variables are the height of crushed coconut shell column which is 60 mm, 80 mm and 100 mm where the<br>column penetration ratio is 0.60, 0.80 and 1.00 respectively. A total of 16 unconfined compression tests had<br>been conducted on kaolin sample with dimensions of 50mm in diameter and 100 mm in height. The increment<br>of shear strength by embedded with crushed coconut shell columns is 19.02 %, 34.76 % and 24.34 % for with<br>4 % area displacement ratio at column penetration ratio of 0.60, 0.80 and 1.00 respectively. From the results<br>obtained, the relationship between shear strength increases is influenced by the height of the column. The<br>maximum column height (full penetration) does not generate the highest strength and it proves that "critical<br>column length" theory is true in this study.<br><br></p> ER -