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This research borders on the effect of strength on the replacement of sand with stabilized laterite in the production of
sandcrete blocks in Benin City. It involves the stabilization of the laterite with 15% cement before being used in the
production of sandcrete block. Lateritic soils were obtained from 1m depth in Dentistry Quarters of the University of
Benin while sharp sand were drilled from Okhuahia River, in Benin City. The samples were taken to the laboratory
where controlled testing and curing. The stabilised laterite was used to gradually replace sand at the rate of 10%,
20%, 30%, 40%, 50% and then completely at 100% in the production of sandcrete blocks. A total 54 sandcrete blocks
were prepared in 0.001 m3 mould and cured for 7, 14 and 21 days, after which the compressive strength of the blocks
were determined and compared with the Nigerian Industrial standards (NIS) as well as the British standard (BS
2028) for minimum strength considerations.The results of tests carried out indicate that there was an improvement in
the strength of the sandcrete block when there was a complete replacement of the stabilised laterite with sand in the
production of sandcrete blocks. The least strength results obtained showed that for each percentage replacement of
sand with stabilised laterite, the minimum compressive strength exceeded that specified by NIS for block production.