In this research work, the effect of sandstone (SS) on concrete produced with plastic synthetic aggregate (PSA) was investigated. A mix proportion of 1:1.6:3.6 with water cement ratio of 0.50 were used. The percentage replacement of coarse aggregate (CA) with plastic synthetic aggregate and plastic synthetic aggregate/sandstone used were 0%, 5%, 10%, 20%, 30% and 40%. Concrete cubes of 150mmxl50mmxl50mm of CA/PSA and CA/PSA/SS were cast and cured at 3.7,28,60 and 90 days respectively. At the ends of each hydration period, the concrete cubes were crushed and their .compressive strength was determined. The result of compressive strength of 5-40% replacement of coarse aggregate with plastic synthetic aggregate ranges from 8.07-36.7lN/mm2 as against 24.55- 41.21N/mm2 for the control test. The result of the compressive strength of 5-40% replacement of coarse aggregate with plastic synthetic aggregate and sandstone ranges from 5.05-31.75N/mm2 as against 24.58- 41.21N/mm2 for the control test. The workability for 5-40% replacement of coarse aggregate with plastic synthetic aggregate ranges from 15-68mm as against 8mm for the control test (0% replacement).
Department Of Civil Engineering, Gregory University, Uturu Abia State Nigeria,
Department Of Civil Engineering Michael Okpara University Of Agriculture, Umudike ,Umuahia, Abia State, Nigeria,
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