Science and Education Publishing American Journal of Civil Engineering and Architecture 2328-3998 4 2 2016 3 5 Strength of Laterite Rock Concrete 54 61 EN Ephraim M. E. Adoga E.A. Rowland-Lato E. O. Department of Civil Engineering, University of Port Harcourt, Port Harcourt, Nigeria AJCEA2016423 10.12691/ajcea-4-2-3 2015 11 22 2016 2 6 2016 3 3 This paper presents the results of laboratory tests conducted to investigate a concrete made with laterite rock coarse aggregates. The structural properties considered were strength and elasticity. Laterite concrete mix proportions of 1:3:6, 1:2:4 1:1½:3 by weight of cement, river sand and laterite rock respectively at varying water/cement ratios of 0.55-0.90 were used. The results established an optimum water/cement ratio of 0.75, 0.60 and 0.55; with characteristic strengths of 12.00N/mm2,18.69N/mm2 and 22.88N/mm2 for mix 1:3:6, 1:2:4 1:1½:3 respectively. Flexural and splitting test results were about 6 - 21% of the compressive strength of the laterite rock concrete. The static modulus elasticity of laterite rock concrete is 22.72kN/mm².