The engineering strength properties of expensive
soils (clayey soil) such as compaction characteristics and
bearing capacity can be improved by stabilization process of
the soil. These properties can be improved by controlled
compaction using the mechanical equipment’s or by addition
of suitable admixtures like cement, fly ash, lime, gypsum or by
reinforcing the soil with shredded tyre, crumb rubber, plastic
waste etc. But gypsum is used now a days to enhance the
geotechnical properties. So, in this research paper gypsum
and calcium chloride has been used to improve the various
strength properties of natural soil. The objective of this
research paper is to examine the strength properties of natural
clayey soil reinforced with different percentage of gypsum by
the weight of soil and fixed percentage of calcium
chloride(Cacl2) as a binding material.
A series of Standard Proctor tests(for calculation of MDD and
OMC) and California Bearing Ratio (C.B.R) tests are
conducted on both raw clayey soil and reinforced soil with
different percentages of gypsum (2%, 4%, 6% and 8%) by
weight and with fixed percentage of calcium chloride
(0.75%). A comparison between properties of raw clayey soil,
raw clayey soil mixed with gypsum and raw clayey soil mixed
with gypsum and calcium chloride (CaCl2) are performed. It is
found that the properties of clayey soil mixed with gypsum and
calcium chloride (CaCl2) are suitably enhanced.