1 Introduction
2 Materials and Methods
2.1 Materials
Composition (%) | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | LOI |
---|---|---|---|---|---|---|---|
OPC | 21.0 | 5.4 | 4.6 | 63.0 | 0.7 | 2.9 | 2.5 |
MP | 18.43 | – | – | 67.79 | 13.78 | – | – |
2.2 Mix Proportions
2.3 Test Methods
2.3.1 Workability
2.3.2 Compressive Strength Test
2.3.3 Split Tensile Strength Test
2.3.4 Characterization of Materials
2.3.5 XRD Investigation
2.3.6 Water Absorption Test
2.3.7 Rapid Chloride Iron Penetration Test (RCPT)
2.3.8 Chloride Diffusion Coefficient
3 Results
3.1 Characterization of Materials
3.2 Effect of MP and NF Particles on Mortar's Fresh and Hardened Properties
Sample ID | W/B | Flow Spread (mm) | Compressive strength-28th day (MPa) | Split Tensile strength-28th day (MPa) |
---|---|---|---|---|
C-1 | 0.5 | 283 | 33.38 | 2.46 |
MP-5 | 0.5 | 289 | 34.65 | 2.51 |
MP-10 | 0.5 | 292 | 35.54 | 2.59 |
MP-15 | 0.5 | 286 | 32.74 | 2.36 |
MP-20 | 0.5 | 273 | 29.72 | 2.04 |
NF-1 | 0.5 | 292 | 35.28 | 3.19 |
NF-2 | 0.5 | 297 | 37.54 | 3.27 |
NF-3 | 0.5 | 282 | 29.42 | 1.94 |
NF-4 | 0.5 | 271 | 24.68 | 1.52 |
3.3 Effect of Optimized Combined Dosage of MP and NF on Fresh as Well as Strength Development (MPNF)
3.4 Water Absorption Test
3.5 Rapid Chloride Iron Penetration Test (RCPT)
3.6 Chloride Diffusion Coefficient (Condition-Steady State)
Sample Id | Charge passed (coulomb) | Free chloride (ppm) | Flux of chloride ions (J) | Steady state diffusion coefficient (D) m3/s |
---|---|---|---|---|
Control | 2577 | 1276 | 8.47 × 10–5 | 3.55 × 10–5 |
MP-2 | 2143 | 886 | 5.88 × 10–5 | 1.48 × 10–5 |
NF-2 | 333 | 319 | 2.11 × 10–5 | 2.79 × 10–7 |
MPNF | 312 | 283 | 1.88 × 10–5 | 8.89 × 10–8 |