Abstract
EXPERIMENTAL PLATE LOAD TEST ON MODIFIED STONE COLUMN IN EFFECTIVENESS OF ENHANCING BEARING CAPACITY OF COLUMN
Nazaruddin A. T.1*, Zainab M.2 and Hafez M. A.3
ABSTRACT
According to previous studies, conventional stone columns have limitation on extremely soft soil due to lack of bonding among the particles of stone. Since many years ago, most of researchers have attempted to solve this problem and one of the solution was using mixed material such as cement to prevent bulging problem on stone columns. However, by implementing use of cement in stone column, it may solve problem related with bulging problem, but also cause the other problem such as increasing the cost of construction. By using waste materials such as fly ash is another solution to solve the problem. Fly ash is a solid waste material which produced from burning coal for energy sources. As a replacement material for cement among the usage of fly ash that has been applied in concrete technology. The study is continuation from previous article published by Author. Based on previous article, Universal Compression test (UCT) and Big Shear test were conducted. Result shows by using 70% of PFA, has gave the high of compressive strength and by using 60% of PFA, was the highest of interface shear strength. Thus, three configurations; 70%, 50%, 90%, 55%, 65% and 75% were chosen to be tested in this study under plate load test. The sample of all columns been tested in isolated clay model. Unit cell theory applied by using steel plate with size of 2 times of diameter column.
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