Table 4 Effects of RHA on strength properties of concrete (free w/b = 0.35).
RHA replacement (%) | Average compressive strength (N/mm2) | Tensile strength (N/mm2) | ||||||
|---|---|---|---|---|---|---|---|---|
3 days | 7 days | 14 days | 21 days | 28 days | 90 days | 180 days | 28 days | |
0 | 44.40 | 45.51 | 52.13 | 54.24 | 55.63 | 65.11 | 66.25 | 3.709 |
5 | 27.38 | 37.13 | 39.54 | 40.23 | 46.50 | 49.46 | 54.91 | 3.812 |