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DEVELOPED STRENGTH AND ENGINEERING PROPERTIES OF STABILIZED ORGANIC SOIL USING CHEMICAL ADMIXTURE: A LINEAR REGRESSION MODEL
Session: Problematic Soils and Ground Improvement III / Sols problématiques et amélioration du comportement III
Md. Rafizul Islam, PhD student (Canada)
Sumi Siddiqua, Assistant Professor (Canada)
Md. Assaduzzaman, Graduate student (Bangladesh)
This study illustrates the developed strength and engineering properties of stabilized soils using chemical admixtures at varying curing periods. Organic soil samples were collected from four selected locations, namely, Teligati, Rangpur, Sonadanga and Khulna University campus, Bangladesh at a depth of 3, 2.5, 2 and 4 m, respectively, from the existing ground surface. Chemical admixtures such as cement, lime and bentonite were added to the organic soil specimens as a percentage of the dry soil mass at 5, 10, 15, 20 and 25 %. To check the validity of unconfined compressive strength (qu) measured in the laboratory, SPSS 16.0 software was used to develop a linear regression model. The reliability and accuracy of the developed model were checked by comparing the predicted qu against the measured values. Based on the regression analysis, R2 values ranging from 0.909-0.984, 0.536-0.930 and 0.726-0.965 were observed for cement, lime and bentonite stabilized soil, respectively. Finally, the predicted qu from the developed model was found to be nearly the same as the laboratory measured value and the degree of accuracy was more reliable.
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