International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
An Experimental Investigation on Stabilization of Peat soil Using Pond Ash Vinay R B1, Ramesha M2, Harish K S3 , Kiran Kumar M S4 1Assistant
Professor, Civil Engineering Department, JIT, Davangere, Karnataka, India Assistant Professor, Civil Engineering Department, JIT, Davangere, Karnataka, India ---------------------------------------------------------------------***--------------------------------------------------------------------2,2,3,4
Abstract - For construction of any civil engineering
structures, the foundation is very important and has to be strong to support entire structure. In order for foundation to be strong the soil around and below it plays a very important role.Peat soil is said to unsuitable soil for any engineering construction. Hence for any civil engineering construction on peat soil requires either replacement of soil or stabilization.
The stabilization potential of pond ash (PA) from a coal fired thermal power station on tropical peat soil. Peat or highly organic soils are well known for their high compressibility, natural moisture content, low shear strength and long-term settlement. This study investigates the effect of different amount (i.e., 5, 10, 15 and 20%) of PA on peat soil, mainly compaction and unconfined compressive strength (UCS) properties. The amounts of PA added to the peat soil sample as percentage of the dry peat soil mass. The UCS value of the peat soils increases almost double from original Peat Soil with addition of 20% Pond Ash of weight of Peat soil. This improvement on compressive strength of tropical peat soils indicates that PA has the potential to be used as a stabilizer for tropical peat soil. Also, the use of PA in soil stabilization helps in reducing the pond volume and achieving environment friendly as well as a sustainable development of natural resources. Key Words: Peat Soil, Pond Ash (PA), Unconfined Compressive Strength (UCS)
Peat soil is said to unsuitable soil for any engineering construction. Hence for any civil engineering construction on peat soil requires either replacement of soil or stabilization. Peat soil is known as very soft soil with highly organic consisting almost entirely of vegetative matter in varying states of decomposition. The stabilization is achieved by mixing peat soil with binding materials such as admixtures or stabilizers. This is the substantial savings in stabilizing existing subgrade instead of replacing existing sub-grade with suitable materials. During rainy seasons weather related delays can be reduced by stabilizing the soil in order to continue the site work. The soil maximum dry density is found to increase with increase in the Pond Ash, while the optimum water content is found to be decreased. Compressive strength and shear strength of the peat soil is increased by mixing with admixtures than that of original peat. The acidity and organic content of the stabilized peat soil decreases so that it becomes neutral peat soil with low organic content.
2. MATERIALS 2.1. Peat Soil The Peat soil sample for this study was collected from chikmagalur Dist, Karnataka state. The top Surface of the soil was cleared with all waste materials and collected at a depth of 0.3m to 0.5m in it’s natural state.
1. INTRODUCTION Soil is one of the world’s most important natural resources, Together with air and water; it is basic for life on planet earth. Soil is a natural body that consists of layers (soil horizons) composed primarily of minerals, which differ from parent materials in their texture, structure, consistency, and colour, chemical, biological and other physical characteristics. The end result, soil is the end product of the influence of climate (temperature, precipitation), relief (slope), organisms (flora and fauna), parent materials (original minerals), and time. In engineering soil is referred to as regolith, or loose rock materials. In general, soil is the depth of regolith that influences and has been influenced by plant roots and may range in centimeters to several metres © 2017, IRJET
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Figure1. Peat Soil
2.2 Pond Ash The Pond Ash sample for this study was collected from Thermal power station Kudithini, Bellary Dist, Karnataka state. Pond ash is the residue after combustion of coal in thermal power plants, so its properties depends upon the coal used and may vary from one power plant to other ISO 9001:2008 Certified Journal
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