The behaviour of granitic residual soil with POFA and lime additives

Mohamed, S. F. Wahida and Zolkofle, M. Aizat and Suwandi, Amir Khan (2007) The behaviour of granitic residual soil with POFA and lime additives. In: Persidangan Kebangsaan AWAM '07, 29-31 Mei 2007, Langkawi, Kedah.

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Abstract

Granitic residual soil is well-known as having potential to shear failure. Utilization of additive is one method that can be applied to stabilize the soil. This study was conducted to determine the effectiveness of using POFA which is a local available material as one alternative in stabilizing the soil by increasing its shear strength. A series of laboratory tests were conducted in determining the physical properties, compaction and shear strength on granitic residual soil. The soil samples; both disturbed and undisturbed were obtained from the vicinity of Taman Bukit Perdana, Batu Pahat, Johor. The samples were divided into three categories for the compaction and shear strength tests; (i) origin granitic residual soil, (ii) soil + POFA (passing 425um sieving) + lime and (iii) soil + POFA (passing 300u.m sieving) + lime. The optimum percentage that yields the highest strength is at soil + 8%POFA (passing 300p.m sieving) + 8%lime. All proportions are measured by weight. Analysis also shows that mixing soil with POFA and lime increasing shear strength of soil. The highest value of shear strength that was obtained from this study is 100.55 kPa. Permeability tests have shown that the value of k in the range of 1.1689 x 10"6to 1.9956 x 10-7 m/s were produced from mixture with the percentages of 8 % POFA and the size of 425 urn + 8% lime. Besides that, mixtures with POFA 8% (300 um) and 12% (300 um and 425 um) also substantially reduced the k value which is suitable for the construction of earth dam core.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:granitic residual soil; Palm-oil Fuel Ash (POFA); lime; compaction; direct shear test; shear strength; permeability
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA703-711 Engineering geology. Rock mechanics. Soil mechanics.
Divisions:Faculty of Civil and Environmental Engineering > Department of Transport and Geotechnique Engineering
ID Code:1967
Deposited By:Nurul Elmy Mohd. Yusof
Deposited On:04 Oct 2011 16:18
Last Modified:04 Oct 2011 16:18

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