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Arshad M.F.,Institute of Infrastructure Engineering and Sustainability Management
Electronic Journal of Geotechnical Engineering | Year: 2014

The effectiveness of using mixtures of lime with palm oil fly ash (Lime-POFA) in soft soil stabilization was investigated by mean of laboratory testing to evaluate the California Bearing Ratio (CBR) value. The Banting soft soil sample classified as slightly sandy clay of intermediate plasticity was used in this studies was collected from Banting Selangor, Malaysia. The Palm Oil Fly Ash (POFA) additives used in this study is a finely waste product material from the process of burning palm oil fiber. The POFA used in this study has been tested and classified as Class-F fly ash accordingly to ASTM C618 and describe as siliceous and aluminous materials with possess little or no cementitious value. In that condition, POFA need to combines with small quantities of lime for pozzolanic reaction. The optimum of 6% hydrated lime used in this study as an active additive to the various percentage mixtures of POFA for the pozzolanic reaction. The aim of this study to determine the optimum proportion percentage of POFA to be mixed with 6% lime to stabilize the clay soil based on the California bearing ratio (CBR) value for soaked condition and unsoaked condition. This is laboratory study involved in California Bearing Ratio testing to determine the CBR value of stabilized soft soil. The result shows, the mixing of 6% Lime with 3% POFA were giving the higher CBR value for soaked and unsoaked condition. It shows the POFA can be used as additives to stabilized soft soil subgrade. © 2014 ejge. Source


Arshad M.F.,Institute of Infrastructure Engineering and Sustainability Management
Electronic Journal of Geotechnical Engineering | Year: 2014

This paper intends to present the use of Nano-kaolin to the kaolin mixtures. The laboratories study was conducted to determine the properties of Nano-kaolin mixed with kaolin. The raw of white kaolin sample was used in this study. Meanwhile, the Nano-kaolin was produced using pulverization process through high energy milling process from raw kaolin into nano size. Only 3% Nano-kaolin was used in this study to mix with kaolin due to the limited amount produced from the milling process. From the scanning electron microscopic (SEM) test and nano size analysis, it was found that the Nano-kaolin particles were obtained from the milling process. The main objectives of this study to determine the geotechnical properties of 3% Nano-kaolin mixed with kaolin. The geotechnical properties regards to its compaction characteristics, liquid limit, plastic limit, plasticity index, pH value, and shrinkage value, hydraulic conductivity value, microstructure and nanostructure of kaolin and Nano-kaolin. The laboratories results showed that the values of liquid limit, plastic limit and maximum dry density slightly higher after addition 3% Nano-kaolin. Meanwhile the plasticity value, optimum moisture content, and hydraulic conductivity value showed decreasing after addition of 3% Nano-kaolin. The results showed the small amount of nanoparticle size of kaolin significant improve the geotechnical properties of kaolin. © 2014 ejge. Source


Arshad M.F.,Institute of Infrastructure Engineering and Sustainability Management
Electronic Journal of Geotechnical Engineering | Year: 2015

This paper intends to present the influence of using nano-soil particles in soft soil stabilization. This experimental based on laboratories study was conducted to evaluate the effectiveness on the geotechnical properties of soft soil stabilized using nano-soil particles. The soft soil sample was collected from Banting, Malaysia. Meanwhile, the nano-soil sample was produced from pulverization process of soil samples through high energy milling process into nanoparticle size. Therefore, only 2%, 3% and 4% nano-soil samples were used in this study due to the limited amount produced from the milling process. The 2%, 3% and 4% nano-soil were mixed to the soft soil based on optimum moisture content at maximum dry density of soil. The first objective of this study is to determine the effective shear strength of soft soil stabilized with nano-soil. Meanwhile the second objective is to determine the compressive strength of soft soil stabilized with nano-soil. The third objective is to determine the Atterberg limit parameters such as liquid limit (LL), plastic limit (PL), and plasticity index (PI) of soft soil stabilized using nano-soil. This study involved three main laboratories testing such as unconfined compression strength to determine the compressive strength and consolidated drained test to determine the effective shear strength. Meanwhile, the Atterberg limit test were conduct to determine the liquid limit (LL) and plastic limit (PL). The laboratories result showed, the addition of 2%, 3% and 4% nano-soil into soft soil was improved the soil strength and effectiveness shear strength of stabilized soft soil. Meanwhile the plasticity value showed decreasing after addition of 2%, 3% and 4% nano-soil and indicating of soil improvement process. The results showed the small amount of nano-soil has a significant to improve and enhanced the geotechnical properties of soft soils. © 2015 ejge. Source

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