International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 02| Jan -2017
p-ISSN: 2395-0072
www.irjet.net
A STUDY ON EFFECT OF BOTTOM ASH AND COCONUT SHELL POWDER ON THE PROPERTIES OF CLAY SOIL A.T.Manikandan1, Y.Ibrahim2, M.P.Thiyaneswaran3, B.Dheebikhaa4, K.Raja5 1Assistant
Professor, Department of Civil Engineering, Kongu Engineering College, Erode, Tamil Nadu, India. Assistant Professor, Department of Civil Engineering, B.S.Abdur Rahman University, Vandalur, Chennai, Tamil Nadu, India 3Assistant Professor, Department of Civil Engineering, Kongu Engineering College, Erode, Tamil Nadu, India. 4 Environmental Engineer, Tamil Nadu, India 5Assistant Professor, Department of Civil Engineering, Kongu Engineering College, Erode, Tamil Nadu, India. ---------------------------------------------------------------------***--------------------------------------------------------------------2
Abstract - Stabilization of soil is essential for utilizing
to stabilize the soil. The main aim of using these products is to bring economy in cost of construction and effective utilization of waste products. Bottom ash is a by-product of burning coal at thermal power plants. Bottom ash particles are coarser than the fly ash which exhibits high shear strength and low compressibility. Coconut shell powder is a residue and an environmental waste which has high stability with soil because of its hardness.
existing ground for construction purposes. Of all the soils, expansive soil causes major problems to civil engineering structures. Such soils swell when given an access to water and shrink when dry out. Due to depleting resources and high cost of construction, there is a need to expose the possibility of using alternate low cost materials. Thereby, stabilization of clay soil by using coconut shell powder (C.S.P) (agricultural and environment waste) and bottom ash (B.A) (by product of industrial waste) is an environmental friendly method. The study includes the evaluation of soil properties like optimum moisture content, dry density, and strength parameters. Different quantities of coconut shell powder and bottom ash (percentage by weight) are added to the expansive soil and the experiments were conducted on these soil mixes. The result shows that the use of coconut shell powder and bottom ash increases the strength of soil to a greater extent.
1.1 Scope of the study In developing country like India rapid industrialization and large scale infrastructural development was left out with high cost of construction materials and tremendous increase in environmental pollution. Being a natural material, soil has complex properties varying from place to place from time to time. The cost of transportation of large quantities of good soil from distant areas for the construction of embankments, sub-grades for roads etc., is also high. So, soil stabilization has become the major issue in construction activity. Innovation methods of soil stabilization are in great demand all over the world.
Key Words: Soil stabilization, Bottom Ash, Coconut Shell Powder, Unconfined Compression strength, Atterberg limits, Plasticity index, swelling, shrinkage.
1.2 Sampling & Testing
1. INTRODUCTION Expansive soils are those whose volume change takes place while it comes in contact with water. It expands during the rainy season due to absorption of water and shrinks during summer season due to drying. Expansive soils cover nearly 20% of the landmass in India. The swelling soils are commonly known by the name of black cotton soils. General properties of the expansive soil are free swell index, swell potential and swelling pressure which directly affect the bearing capacity and strength of foundation lying on such a soil. Typical behavior of swelling and shrinkage of expansive soil develop problems like cracking in foundation. Hence, it is necessary to improve the properties of such a soil to avoid damages to the structure. Although mechanical compaction, dewatering and earth reinforcement have been found to improve strength of the soil, other methods like stabilization using admixtures are too advantageous. The different admixtures available are lime, cement, fly ash, blast furnace slag, coconut shell powder, bottom ash etc., In this study bottom ash & coconut shell powder have been chosen
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The study aimed to analyze the strength and behavior of bottom ash and coconut shell powder with clay. After collecting the soil sample from a site located at Kalipattur, Kelambakkam & OMR, Chennai, Tamilnadu. The soil sample was procured from an open excavation at a depth of 1m from the ground surface. The soil was air dried, pulverized and passed through IS 425-micron sieve and stored in airtight bags. Tests were conducted to determine the basic properties of the virgin soil such as Atterberg’s limits, compaction characteristics, specific gravity, UCC strength etc. Bottom ash was collected from the Neyveli Lignite Corporation at Neyveli. Raw bottom ash is a granular material that consists of a mix of inert materials such as sand, stone, glass, porcelain metals and ash from burn materials. The coconut powder was collected from two places Kumbakonam and Periyakulam located in Tamilnadu. Different mix proportions have been identified for testing and the virgin sample properties were compared with the resulting highly stabilized soil.
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