Table 4.
Setting time results at 73.4 °F (23 °C) and 50 °F (10 °C) for the 10 mortar mixtures.
| MIX ID | OPC | LS20 | LS30 | LS40 | CaCl2_1 | CaCl2_2 | CaCl2_3 | Hybrid | LS2_05 | LS2_13 |
|---|---|---|---|---|---|---|---|---|---|---|
| 73.4 °F/23 °C setting time (h) | 3.06 | 2.37 | 2.15 | 1.64 | 2.10 | 1.50 | 1.10 | 1.62 | 2.79 | 2.47 |
| 50 °F/10 °C setting time (h) | 5.56 | 4.53 | 3.60 | 3.76 | 2.53 | 3.23 | 4.66 | |||
| Setting time app. activation energy (kJ/mole) | 31.9 (4.0)f | 34.8 (5.1) | 42.0 (7.2) | 31.4 (5.9) | 28.2 (8.3) | 36.9 (7.4) | 34.0 (4.9) | |||
| Hydration (calorimetry) app. activation energy (kJ/mol) | 39.8 | 39.8 | 44.7 | 39.8 | 42.2 | 42.2 | 38.5 |
e
1 kJ/mol = 0.447 BTU/lbmol
f
Number in parentheses indicates calculated combined standard uncertainty [Taylor and Kuyatt, 1994].