This study aimed at the potentialities of replacing natural coarse aggregate (NCA) with recycled polypropylene (PP) plastic waste for normal-strength concrete. It mainly focused on comparing the analytical shear strength of plain concrete incorporated with recycled PP waste with the experimental results obtained by the push-off tests. The experimental work included a varying percentage of polypropylene plastic aggregate (PPA) as 10%, 20%, and 30% volumetric replacement of NCA for the water/cement (w/c) ratio of 0.55. The initial experimental results concluded that the workability decreased with the increasing PP% and a super-plasticizer was required to achieve adequate workability. The compressive strength was reduced by 14%, 19% and 31% respectively for the 10%, 20% and 30% of PP content. Similarly, plastic aggregate concrete (PAC) was weaker in shear than natural aggregate concrete (NAC) and push-off shear strength (νpo) was reduced by 9%, 12% and 18% for increasing PP content. The determination of the shear strength of plain concrete by using the provisions available in BS EN 1992-1-1-2004 was more conservative for PAC and a new empirical equation was proposed to obtain the push-off shear strength (νpo) in terms of the cube compressive strength (fcu). However, this relationship was satisfied for both PAC and NAC and the relationship was νpo = 0.61 \( \sqrt{f_{cu}} \) .