EFFECT OF SUGAR CANE BAGASSE ASH ON THE PHYSICAL PROPERTIES OF SUBGRADE LAYER

Ghassan Masued, Ghadah

	EFFECT OF SUGAR CANE BAGASSE ASH ON THE PHYSICAL PROPERTIES OF SUBGRADE LAYER
Journal of Engineering and Sustainable Development
Article 1, Volume 21, Issue 5, 2017, Pages 146-158
Author
Ghadah Ghassan Masued
Abstract
in pavement, subgrade layer must be has enough strength in order to withstand and support the other layers. Availability of waste materials from industry and agriculture and the need to employing the use of this material in the field of roadworks instead of traditional stabilizing agents has encouraged an investigation into stabilizing the soil by sugar cane bagasse Ash (SCBA). Sugar cane bagasse Ash has beneficial engineering purposes of using it as stabilizer material. Work of this paper is aimed to evaluate the potential benefits of bagasse ash, which is considering pozzolana material, as stabilizer material for subgrade layer. The laboratory work involved soil stabilized with varying percentages of sugar cane bagasse ash ) 3%, 5%, 7%, 10%, 15%, 20%, 25% and 30%( by dry weight of the soil individually. The used soil shows that it belongs to A-7-6 class of soil in the AASHTO soil classification system and the soil under this class is generally of poor engineering use. Analysis of the results shows that slight improvement on the geotechnical properties of bagasse ash stabilized soil, where increasing the addition of bagasse ash reduces plastic limit (P.L), liquid limit (L.L), specific gravity (Gs) and maximum dry density (MDD) values, while increase the optimum moisture content (OMC) value for soil stabilized by bagasse ash. The results of conducted tests show that initially OMC of soil is (21.9%) and for addition of bagasse ash up to (30%) it becomes (34.52%) and the increase is about (57.6%), to the contrary the initially MDD of soil is (1.59 gm/cm3) and for addition of bagasse ash up to (30%) it has become in decrease upto (1.11 gm/cm3) where the reduction is about (30.2%). For liquid limits, plastic limits and plasticity index the results of it at 30% bagasse ash is slightly lower than it for nature soil and the reduction is about (4.9%) for liquid limit , (2%) for plastic limit and (2.9%) for plasticity index. Finally, for the specific gravity (Gs) the initial value of it for soil is (2.7) and for (30%) bagasse stabilized soil decrease to be (2.5) with reduction about (0.2%).
Keywords
Sugar cane bagasse Ash; pozzolana; pozzolanic activity; calcination temperatures

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