Abstract:
Expansive soils are considered a special type of clay soils, as they show significant swelling
and shrinkage deformations with changes in the content of soil moisture. The change in the
volume of the expansive soil due to the moisture content leads to serious damages to concrete
structures. It is documented that about 50% of Punjab province area is covered by the expansive
soils. However, stabilizing expansive soil by means of bitumen emulsion is one of the wellknown effective approaches.
On the other hand, the use of waste materials i.e. waste engine oil and scrap tires is
considered as one of the lofty goals towards environmental sustainability. Globally, more than
1 billion scrap tires are generated. In addition, the annual production of waste engine oil is 24
million tons worldwide. Therefore, this project is aimed to develop a unique bituminous
emulsion through modifying base bitumen with waste engine oil and crumb rubber (scrap tries).
Thus, this project will provide unique and affordable solutions to overcoming the issues of
expansive soil and contributing to environmental sustainability. The stabilization of the soil by
using the bitumen emulsion having 80% engine oil was find more suitable for the stabilization
of the soil for the road or pavement and the bitumen emulsion having 70% engine oil and 6%
crumb were find more suitable for the stabilization of for the foundation of the building and
other structures. The stabilized soil was evaluated in terms of California load-bearing capacity
and Shear strength.
