Effect of Metakaolin on the Swelling and Shrinkage Behaviour of a highly Expansive Soil

Noor Th. Abd; Jasim M. Abbas

doi:10.24237/djes.2023.16205

Authors

Noor Th. Abd
thamrn635@gmail.com
Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq
Jasim M. Abbas Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq

Keywords:

Expansive soil, Metakaolin -based Geopolymer, Swelling pressure, Swelling potential

Abstract

Chemical stabilization of soil is essential for construction work because it improves engineering characteristics of soil, such as swelling soil stability. The main objective of the research is to investigate the impact of adding Metakaoline (MK) on the behavior of expansive soil to reduce swelling. Different amounts of Metakaoline, such as 2 %, 4 %, and 6 % of the weight of dry soil, are used to prepare the soil specimens. The engineering properties of the soil sample are examined using a variety of laboratory tests (consolidation, swelling potential, and liner shrinkage) original and treated soil at various mixing ratios to determine the swell potential and swelling pressure. The findings showed that the addition of MK has caused a reduction in the swelling reaching about 91% with 4% MK at 14 days, Also, the swelling pressure decreased from 110 kPa to 30 kPa with 4% Metakaolin.

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