INFLUENCE OF USING UNGRADED SAND ON SOME CONCRETE PROPERTIES

Abstract

This research is studied possibility of using a sort of sand which its characters are not fulfilled Iraqi standard specification No. 45 - 1984 for passed graded materials that respect to sieve No.300 with deviation ratio up to14.5% as maximum as fine aggregate inproducing Concrete that has lower ( 12.4% compression, 18.5% tensile strength,and 1.35% density ) with increasing in water absorbing ratio which is reached to 9.5% in comparison with referential mixture . Mentioned sand is used with an addition of 10%cement weight that is used in the mixture for curing so as to produce Concrete which has an increasing of (compressive strength8.83%,tensile strength 11.15%,and 1.01% density )and with decreasing inratio of water absorption 2.5% . There is alsopossibilityfor addingplasticizer in the ratio 1% of cement weight that is used in the mixture so as to produce Concreteis had more(40.63% compression, 32.4% tensile strength,and 1.98% density ) withdecreasing inratio 8% of water absorption in comparison with same referential mixture .