The citric acid was used as a water reducer, setting time retarder and workable time extender admixture on ordinary Portland cement (OPC). The changes in compressive strength, permeability and rebar corrosion upon addition of this admixture were studied. The study also explores the effects of citric acid, tri-lithium citrate, tri-sodium citrate and tri-potassium citrate on most of the physical properties of the ordinary Portland cement type 1 (OPC) produced by Basrah cement factory /IRAQ. Thus, the compressive strength, standard consistency and setting time tests were performed. The results showed increasing in compressive strength in age 28 days, when low dosages (approximately ? 0.2%) of all types of admixtures were used. Standard consistency results showed a correlation between amount of admixtures and reducing water demand to reach standard consistency. The Setting time test showed the low dosages of all admixtures prolonged the thickening to a certain extent, while the large amounts were caused a remarkable reduction. The increasing in strength in a small number of admixtures may be attributed to the hardened cement specimens. An improvement in permeability and rebar corrosion, also, was observed when certain ratios of admixtures have been used.