Use of Lignin as Feasible Additive to an Expansive Soil

  • Nitin Arora, Harpreet Singh

Abstract

An Expansive soil aresoil sprone to large volume changes which can be directly associated to modifications in water content. Soils with a large content material of expansive minerals can shape deep cracks in drier seasons of a year such soils are recognized as Vertisols it may results in generation of trouble in engineering structures such as pavements, retaining structures and buildings. The conduct be subject to mostly on the physical and chemical features of the expansive soil and the olden times loads subjected to it. The minerals responsible to large volume change by change in moisture content results in differential settlements of foundation of the engineering structures that is dangerous. Old-style to deal with this is addition of various stabilizers as cement or lime or chemicals to decrease shrinking and swelling nature of expansive clays. Usage of polymeric organic essences has been established expansively in farming to regulate the movement of fines and advance water holding capacities in dry or hot areas. In this study lignin, the paper and pulp industry effluent, is been used as additive for expansive soil. During the bleaching process of pulp, lignin is removed and drained as wastewater. The soil classified as silty clay with high plasticity that contains 85% of clayey portion (particle size< 0.002mm) with plasticity index as 29% and liquid limit of 55%. The Reports of the tests shows free swell index of 160% and 25 % eexpansion in oedometer as per Holts and Gibbs   this paper studies the stabilization effect of lignin, and 5 soil-lignin mixtures ( 0%, 3%, 6%, 9%, and 12% by weight) were studied evaluating free swell index, swelling pressure, hydraulic conductivity and water retention. And the results show lignin as additive the free swell index of expansive soil was expressively dropped and this drop was more as the fraction of stabilizer increases, but 6% & 9% of lignin shaped nearly the similar results in together swell index and swelling pressure.

Published
2020-06-01
How to Cite
Nitin Arora, Harpreet Singh. (2020). Use of Lignin as Feasible Additive to an Expansive Soil. International Journal of Advanced Science and Technology, 29(10s), 5210-5214. Retrieved from http://sersc.org/journals/index.php/IJAST/article/view/22163
Section
Articles