Research Article
Shear Strength of Reinforced Recycled Aggregate Concrete Corbels
Table 2
Physical properties and chemical composition of the used cement.
| | Physical properties | Iraqi specification no. 5 [11] |
| | Sitting time (min) | | | | Initial | 130 | 45 min | | Final | 240 | 600 max | | Compressive strength (MPa) | | | | 7 days | 20.5 | 15 min | | 28 days | 28.8 | 23 min | | Specific surface, blaine, cm2/g | 3120 | 2900 min | | Chemical analysis (%) | | | | Lime (CaO) | 62.00 | | | Silica (SiO2) | 21.00 | | | Alumina (Al2O3) | 5.26 | | | Iron oxide (Fe2O3) | 3.00 | | | Magnesia (MgO) | 2.70 | 5 max | | Sulfate (SO3) | 2.10 | | | Loss on ignition (LOI) | 1.10 | 4 max | | Insoluble residue (IR) | 0.49 | 1.5 max | | Lime saturation factor (LSF) | 0.92 | 0.66–1.02 | | Tricalcium silicate (C3S) | 47.11 | | | Dicalcium silicate (C2S) | 30.81 | | | Tricalcium aluminate (C3A) | 8.87 | 2.5 max | | Tetracalcium aluminoferrite (C4AF) | 9.12 | |
|
|
