This study is intended to explore the suitability of recycled plastics (high density polyethylene) as coarse
aggregate in concrete by conducting various tests like workability by slump test, compressive strength of cube
and cylinder, splitting tensile strength test of cylinder, flexural strength of R.C.C as well as P.CC. beams to
determine the properties and behaviour in concrete. Effect of replacement of coarse aggregate with various
percentages (0% to 40%) of plastic aggregate on behaviour of concrete was experimentally investigated and the
optimum replacement of coarse aggregate was found out. The results showed that the addition of plastic
aggregate to the concrete mixture improved the properties of the resultant mix.
Keywords – High density polyethylene, Optimum replacement, Plastic aggregate, Recycled Plastic, Strength