eng Science and Education Publishing American Journal of Civil Engineering and Architecture 2328-3998 2016-03-05 4 2 54 61 10.12691/ajcea-4-2-3 AJCEA2016423 article Ephraim M. E. 1 Adoga E.A. 2 Rowland-Lato E. O. rowlandlato@yahoo.com 3 Department of Civil Engineering, Rivers State University of Science and Technology, Port-Harcourt, Nigeria Department of Civil Engineering, Auchi Polythechnic, Auchi, Edo State, Nigeria Department of Civil Engineering, University of Port Harcourt, Port Harcourt, Nigeria 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. http://pubs.sciepub.com/ajcea/4/2/3/ajcea-4-2-3.pdf strength impact workability concrete laterite rock