Page - 935 - in Book of Full Papers - Symposium Hydro Engineering

2.1.2. Cement CEM − II type of cement in appropriate to Iran Standards used to prepare the concrete mixtures, which physical and chemical characteristics are given in Table 2 [7, 8]. Table 2. Chemical characteristic of cement Value Physical characteristics 25 Water Concentrate % 0.01> Autoclave % 3.16 Specific gravity (gr/Cm 3) 316 Specific area (m2/Kg) Initial setting: 170 Setting period (Minutes) Final setting: 215 1 days: 1370 Compressive strength (Lb/in2) 3 days: 2210 7 days: 2900 28 days: 3530 Table 3. Physical characteristic of cement Value (%) Chemical characteristics 62.71 CaO 3.06 SO3 - Cl− 51 C3S 21 C2S 5 C3A 1.92 Ignition Loss 0.42 Remaining Dissolved 2.1.3. Water The water used for mixing the concrete mixtures of the experimental studies was potable and appropriate to the Iran Standards [9]. Water analysis results used in test mixtures gave in Table 4. 935