Table 6 Effects of RHA on strength properties of concrete (free w/b = 0.45).
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 | 30.18 | 30.16 | 37.73 | 40.59 | 40.71 | 50.04 | 51.07 | 3.517 |
5 | 30.60 | 31.52 | 37.92 | 41.95 | 45.11 | 51.65 | 52.17 | 3.591 |
10 | 26.91 | 34.38 | 37.05 | 39.29 | 44.83 | 49.07 | 50.48 | 3.230 |
15 | 21.70 | 27.15 | 26.75 | 36.48 | 42.84 | 44.15 | 45.08 | 3.228 |