We are the supplier of grey portland cement : export commodity: grey portland cement opc 42, 5 r terms of export: origin: pakistan port of loading: karachi delivery terms: fob, cnf asia resource: 15000 mt per month min. order: 1000 mt container size: 20' packing:50 kg pp bags inspection: sgs or similar pb: 2% payment: letter of credit at sight via prime bank standard pakistan standard pss 232-1983(r) and(or) british standard 12:1978/bis price by request chemical composition of cement: mgo 3% max, so3 2.8% max, al2o3 5.7% max, sio2 21.5% max, fe2o3 4% max, cao 64% max, loi 1.5% max, insoluble residue 0.7% max, ls.f 0.93% max, sm 2.4% max physical composition of cement: blain 2.800 sm2/gm, expansion 1-1.5 mm, time of setting (minutes) initial set 130-145-final set 180-200, compressive strength of mortar cubes 3 days 4200-4600 psi,7 days 5200-5600 psi, 28 days 6500-7000 psi.