Table 4.
Mix proportions of geopolymer concrete (kg m−3) based on the work of Koushkbaghi et al. [60] (note: SS, sodium silicate; SH, sodium hydroxide; NCA, normal-coarse aggregate; and RCA, recycled coarse aggregate). Reproduced with permission from [60], [Construction and Building Materials]; published by [Elsevier], [2019].
| Mix ID | Metakaolin | SS | SH | Aggregates | ||
|---|---|---|---|---|---|---|
| Fine Aggregate | NCA | RCA | ||||
| R2 a | 400 | 90 | 45 | 600 | 1250 | 0 |
| R2RCA10 | 400 | 90 | 45 | 600 | 1025 | 115 |
| R2RCA20 | 400 | 90 | 45 | 600 | 910 | 230 |
| R2RCA30 | 400 | 90 | 45 | 600 | 800 | 340 |
| R2.5 | 400 | 115 | 45 | 600 | 1250 | 0 |
| R2.5RCA10 | 400 | 115 | 45 | 600 | 1025 | 115 |
| R2.5RCA20 | 400 | 115 | 45 | 600 | 910 | 230 |
| R2.5RCA30 | 400 | 115 | 45 | 600 | 800 | 340 |
| R3 | 400 | 135 | 45 | 600 | 1250 | 0 |
| R3RCA10 | 400 | 135 | 45 | 600 | 1025 | 115 |
| R3RCA20 | 400 | 135 | 45 | 600 | 910 | 230 |
| R3RCA30 | 400 | 135 | 45 | 600 | 800 | 340 |
a Numbers after R is SS/SH ratio and after RCA is recycled aggregate percentage.