Parametric Study on Performance Evaluation on Black Cotton Soil Stabilized with Rice Husk Ash and Randomly Distributed Sisal Fibres

Author(s):

Vikas Kumar Shrivastava , 3 Lakshmi Narain College of Technology(LNCT), Bhopal; Vikash Kumar Singh , Lakshmi Narain College of Technology(LNCT), Bhopal, India; Abhay Kumar Jha , Lakshmi Narain College of Technology(LNCT), Bhopal, India

Keywords:

BC Soil, Rice Husk Ash, Sisal Fibre, OMC, MDD, CBR and Swelling

Abstract:

In many situations, soils cannot be used directly as road service layers, foundation layers and as a construction material; hence the properties of those soils should be changed. Expansive soils are one of those kinds of soils whose volume change takes place while it comes in contact with water. It expands during the rainy season due to intake of water and shrinks during summer season. The wetting and drying process of a subgrade layer composed of black cotton (BC) soil result into failure of pavements in form of settlement and cracking. Therefore, prior to construction of a road on such sub-grade, it is important either to remove the existing soil and replace it with a non-expansive soil or to improve the engineering properties of the existing soil by stabilization. There are number of soil improvement techniques. These include stabilization of soil by lime, cement, lime and cement, bitumen, chemicals etc. Rice husk ash (RHA) is also used to stabilize the black cotton soil. RHA is abundantly available as industrial and Agricultural waste and is hazardous if not disposed scientifically. Pavement construction is one of the major area in which a large quantity of RHA could be effectively utilized. The presence of small amount of fibres in soil enhances soil strength and reduces swell shrink behavior of soil. Using fibres reinforcement in sub grades can increase safety coefficient of embankment stability and also decrease displacements. Furthermore, if the weak sub grade is stabilized or reinforced, the crust thickness required will be less, which results in less repairs and overall economy. The present work is aimed to assess the improvement in the strength and stability characteristics in soft Subgrade soil by using the RHA for the stabilization and then Sisal fibre as reinforcing material. Randomly distributed fibre reinforced soil technique is used to prepare the reinforced soil samples. In RDFRS technique the mixing of reinforcement in the soil is Very easy and no special skill is required. The reinforcement is added by percentages of the weight of the BC soil sample and by following certain aspect ratio i.e., length/diameter (L/D) ratio. Attempt is made to determine optimum combination RHA and fiber content for maximum gain in strength.

Other Details:

Manuscript Id	:	IJSTEV3I12091
Published in	:	Volume : 3, Issue : 12
Publication Date	:	01/07/2017
Page(s)	:	188-193

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