ADITHYA P P
ANGITH KRISHNA V 
ANUNANDA A 
JISHNU C V 

Soil stabilization is a crucial technique for improving the engineering properties of unstable
soils. This study explores the potential of using recycled Polyethylene Terephthalate (PET)
plastic and fly ash as stabilizing agents for soil. A series of laboratory tests were conducted to
evaluate the effects of PET plastic and fly ash on the geotechnical properties of soil, including
unconfined compressive strength, and Atterberg limits. The use of recycled PET plastic and fly
ash as soil stabilizers offers a sustainable and environmentally friendly solution for improving
soil properties, while also reducing waste and promoting recycling. A comprehensive testing
program was conducted to evaluate the effectiveness of this stabilization approach. The tests
performed include Atterberg limits, Standard Proctor compaction, and specific gravity test to
assess soil consistency, compaction characteristics, and material density. Results indicate
significant improvements in soil strength, load-bearing capacity, and resistance to deformation.
The findings suggest that incorporating fly ash and recycled PET plastic in soil stabilization
presents a viable solution for sustainable construction, reducing industrial waste while
enhancing infrastructure resilience. This study presents the geotechnical properties of a soil
sample, which is crucial for soil stabilization.

Keywords: soil stabilization, PET plastic, fly ash, sustainable construction, geotechnical
properties.