Crushed rock sand is a term used for fine aggregate passed by 4.75mm and retained onrn150Î¼m sieve size which are manufacture in quarry. Because of raped booming ofrnconstruction industry in Ethiopia, Natural River sand increasingly depleted and its methodrnof production was affect our planet. Concrete is the most dominant building material inrnconstruction world. From the given produced volume of concrete more than 70% isrnaggregate. So, therefore the quality of concrete is strongly influenced by aggregateâ€™srnphysical and mechanical properties. In this research physical properties of aggregates arernreviewed, compressive strength of concrete produced from CR sand and River sand wererntested to learn the influence of fines content in CR sand on concrete production wasrninvestigated.rnIn very beginning, crushed rock sand and river sand sample to be used in concrete mixesrnwere collected from YENCOMAD construction Plc. crushing site and Alem Tena Area Riverrnrespectively and their physical property were studied. Twenty-four different concrete mixrnhaving three different water to cement ratio (0.4, 0.5 and 0.6) and four different fines contentrn(6%, 9%, 12% and 15%) for both river and crushed sand were prepared using sand tornaggregate ratio 0.45 and water content 190kg/m3. The slump was range between 50mm torn90mm for both sand. The average compressive strength of crushed stone sand concreternbetween 20 and 60 Mpa and for river sand concrete ranging between 15 to 50 Mpa. A totalrnof 144 cube was casted for trial and 216 cube were casted as final laboratory test.rnConclusion and recommendation were drown based on laboratory result analysis.rnThe test results are compared with the standard requirements and specification. Based onrnthe findings, conclusions are drown and recommendations are forwarded.