Reaction Mechanism of Chemical Stabilization in Expansive Soil

Abstract

Chemical Stabilization in expansive soil have applications for many structures such as foundation, embankment, roadways, and water, sewer lines and play important role. Stabilized soil properties like plasticity, shrinkage and swelling, permeability and strength are depends on the type, shape, dimension and distribution of reaction products and pores. Proper mix design and curing conditions controls the capability of expansive soils and stabilizers to engage in the formation of cementitious compounds. Due to alteration in the mineralogy of the treated soil and new mineral formations with more stable are produced. Traditionally lime, salt and cement were used as a stabilizer but recently many stabilizers which are coming in the market required more attention. Most published reviews focus on defining the test results and performance of pozzolanic material properties and do not treat the subject of the mechanism of the pozzolanic reaction in detail. Hence the main objective of this paper is overview the reaction mechanism of chemical stabilization in expansive soil.