International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
STABILIZATION OF CLAYEY SOIL USING POLYPROPYLENE FIBER C. M. Sathya Priya1, S. Archana2, A. Bichu Albert3, A. D. Deeraj4 UG Student, Dept. Of Civil Engineering, Ahalia School Of Engineering And Technology, Kerala, India 4Professor, Dept. Of Civil Engineering, Ahalia School Of Engineering And Technology, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract - In India, a major portion of total land area is covered by clayey soil. Of this, a large proportion is expansive soil. Structures constructed over this expansive soil may be severely damaged due to its high swell-shrinkage behavior. So such soils need to be stabilized to increase its strength, durability and to prevent erosion. Various studies have been carried out on expansive soils to improve its properties. Soil stabilization is one of the promising techniques used to improve the geotechnical properties of soil and has become the major practice in construction engineering. This project aims to conduct a study to check the improvements in properties of clayey soil by adding polypropylene fiber. By varying percentage of reinforcement (0%, 0.5%, 1% and 1.5%), the soil parameters such as UCS and DRY DENSITY may be studied. These values are compared to that of a control specimen.
It is more economical both in terms of cost and energy to increase the bearing capacity of the soil rather than going for deep foundation or raft foundation. It is also used to provide more stability to the soil in slopes or other such places. Sometimes soil stabilization is also used to prevent soil erosion or formation of dust, which is very useful especially in dry and arid weather. It helps in reducing the soil volume change due to change in temperature or moisture content. Stabilization improves the workability and the durability of the soil.
1.2 Materials Used 1.2.1 Soil: Soil used for the study is clayey soil. It has been collected from Ahalia campus, Kerala. It is a soil of high plasticity. The high plasticity index indicates high swell potential, the most problematic soil type under light structures.
Key Words: Swell, Liquid Limit, UCC, Compaction, Polypropylene fiber and clayey soil.
1. INTRODUCTION
1.2.2 Reinforcement: Polypropylene fibre is used in this study and it is a synthetic material. Fibers used for this study has a length of 12mm were purchased from the market. Polypropylene fibers are hydrophobic, non-corrosive and resistant to alkalis, chemicals and chlorides.
Soil stabilization is an effective and reliable technique for altering important soil properties. Several reinforcement methods are available for stabilizing expansive soils such as stabilization with chemical additives, rewetting, soil replacement, compaction control, moisture control, surcharge loading and thermal methods [1]. These techniques have wide application in areas like construction of road, slope stabilization, railway embankments, and so on [8]. Soils are generally stabilized to increase their strength and durability or to prevent erosion and dust formation in soils. The main aim is the creation of a soil material for the designed life of the engineering project. The properties of soil vary a great deal at different places. Various methods are employed to stabilize soil and the method should be verified in the lab with the soil material before applying it in the field.
Table -1: Properties of polypropylene fiber
Fiber Properties
Values
Specific Gravity
0.91
Density (gm/cc) Average Length (mm) Average Diameter (mm)
0.90 12 0.048
1.1 Needs And Advantages
2. PREPARATION OF SAMPLE
It improves the strength of the soil, thus, increasing the soil bearing capacity.
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Impact Factor value: 5.181
The soil sample should be oven dried at approximately 105°C and then ground. Content of fiber to be added in the soil is herein decided by equation 1. The different values adopted
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