1 Introduction
2 Experimental Program
2.1 Materials
Chemical analyses (%) | PC40 | RHA | SF | LSP |
---|---|---|---|---|
SiO2 | 21.29 | 86.81 | 96.20 | 0.17 |
Al2O3 | 5.72 | 0.50 | 0.70 | 0.02 |
Fe2O3 | 3.30 | 0.87 | 0.30 | 0.04 |
CaO | 63.18 | 1.04 | 0.00 | 54.88 |
MgO | 1.10 | 0.85 | 0.10 | 0.45 |
Na2O | 0.12 | 0.69 | 0.06 | 0.02 |
K2O | 0.30 | 3.16 | 0.37 | 0.04 |
LOI | 0.193 | 4.6 | 1.60 | 43.46 |
Density (g/cm3) | 3.10 | 2.24 | 2.26 | 2.72 |
Mean particle size (µm) | 16.12 | 8.42 | 0.29 | 18.19 |
Blaine SSA[BET-SSA] (m2/g) | 0.369 | [23.32] | [26.43] | 0.321 |
Passing percentage (%) | ||
---|---|---|
Fine sand | Coarse sand | |
Sieve size (mm) | ||
4.75 | 100 | 100 |
2.36 | 100 | 94.9 |
1.18 | 99.7 | 72.2 |
0.6 | 89.1 | 38.2 |
0.3 | 42.9 | 14.1 |
0.15 | 1.1 | 0.6 |
Fineness modulus | 1.9 | 2.8 |
Density (g/cm3) | 2.6 | 2.6 |
Absorption (%) | 2.0 | 1.9 |
2.2 Mixture Proportions
Mixture | Cement (kg/m3) | RHA (kg/m3) | SF (kg/m3) | LSP (kg/m3) | Water (kg/m3) | Coarse sand (kg/m3) | Fine sand (kg/m3) | SP (%) |
---|---|---|---|---|---|---|---|---|
REF | 530 | 0 | 0 | 150 | 175 | 1,045 | 448 | 0.12 |
5 % RHA | 505 | 25 | 0 | 125 | 175 | 1,055 | 452 | 0.12 |
10 % RHA | 482 | 48 | 0 | 102 | 175 | 1,064 | 456 | 0.11 |
15 % RHA | 461 | 69 | 0 | 81 | 175 | 1,073 | 460 | 0.11 |
20 % RHA | 442 | 88 | 0 | 62 | 175 | 1,081 | 463 | 0.11 |
10 % SF | 482 | 0 | 48 | 102 | 175 | 1,064 | 456 | 0.11 |
2.3 Preparation of Test Specimens
3 Results and Discussion
3.1 Workability
3.2 Compressive Strength and Splitting Tensile Strength
3.2.1 Compressive Strength
3.2.2 Splitting Tensile Strength
3.2.3 Ratio of Compressive Strength to Splitting Tensile Strength
Mixtures | Compressive strength (MPa) | Splitting tensile strength (MPa) | Compressive/Splitting tensile strength |
---|---|---|---|
REF | 54.0 | 5.1 | 10.6 |
5 % RHA | 55.4 | 5.6 | 10.0 |
10 % RHA | 62.3 | 6.5 | 9.6 |
15 % RHA | 60.3 | 6.0 | 10.1 |
20 % RHA | 60.2 | 5.4 | 11.1 |
10 % SF | 59.0 | 6.3 | 9.4 |