Back to Article
Early-age chemical and autogenous shrinkage of cement pastes containing palm oil fuel ash at different water-to-binder ratios
World Journal of Civil Engineering and Architecture
| Vol 4, Issue 1
Table 4. Chemical (CS) and autogenous (AS) shrinkage at 24 h,change relative to the control at the same w/b, and AS/CS ratio.
| w/b | POFA (%) | CS24 (10−3 cm3/g) | ΔCS (%) | AS24 (10−3 cm3/g) | ΔAS (%) | AS/CS |
| 0.3 | 0 | 32.2 | — | 35.8 | — | 1.11 |
| 0.3 | 10 | 29.6 | −8.1 | 35.1 | −2.0 | 1.19 |
| 0.3 | 20 | 32.2 | 0.0 | 37.0 | +3.4 | 1.15 |
| 0.3 | 30 | 34.6 | +7.5 | 34.4 | −3.9 | 0.99 |
| 0.4 | 0 | 30.0 | — | 32.4 | — | 1.08 |
| 0.4 | 10 | 26.8 | −10.7 | 30.7 | −5.2 | 1.15 |
| 0.4 | 20 | 31.5 | +5.0 | 31.6 | −2.5 | 1.00 |
| 0.4 | 30 | 32.2 | +7.3 | 29.6 | −8.6 | 0.92 |
| 0.5 | 0 | 29.8 | — | 27.5 | — | 0.92 |
| 0.5 | 10 | 26.7 | −10.4 | 26.4 | −4.0 | 0.99 |
| 0.5 | 20 | 30.7 | +3.0 | 27.4 | −0.4 | 0.89 |
| 0.5 | 30 | 30.8 | +3.4 | 27.4 | −0.4 | 0.89 |
ΔCS and ΔAS: change relative to the 0% POFA paste at the same w/b; negative values indicate lower shrinkage than the control.