1 Introduction
2 Test Program
2.1 Materials, Mixture Proportions, and Curing Condition
W/B (%) | BFS/B (%) | s/a (%) | Unit weight (kg/m3) | |||||
---|---|---|---|---|---|---|---|---|
Water | Cement | BFS | Fine aggregate | Coarse aggregate | AEWR agent | |||
25.0 | 0 | 43.7 | 163 | 652 | 0 | 682 | 882 | 0.80 |
40 | 42.0 | 391 | 261 | 647 | 897 | 0.65 | ||
50 | 41.7 | 326 | 326 | 641 | 899 | 0.70 | ||
60 | 41.4 | 261 | 391 | 634 | 901 | 0.75 | ||
70 | 41.1 | 196 | 456 | 628 | 903 | 0.70 | ||
27.5 | 0 | 43.7 | 593 | 0 | 703 | 909 | 0.77 | |
40 | 43.0 | 356 | 237 | 685 | 911 | 0.60 | ||
50 | 42.7 | 296 | 296 | 678 | 913 | 0.63 | ||
60 | 42.4 | 237 | 356 | 671 | 916 | 0.70 | ||
70 | 42.1 | 178 | 415 | 665 | 918 | 0.68 | ||
30.0 | 0 | 43.7 | 543 | 0 | 721 | 932 | 0.80 | |
40 | 44.0 | 326 | 217 | 719 | 919 | 0.63 | ||
50 | 43.7 | 272 | 272 | 712 | 921 | 0.60 | ||
60 | 43.4 | 217 | 326 | 706 | 924 | 0.68 | ||
70 | 43.1 | 163 | 380 | 699 | 927 | 0.70 |
Surface area (cm2/g) | Density (g/cm3) | Ig.loss (%) | Chemical composition (%) | |||||
---|---|---|---|---|---|---|---|---|
SiO2
| Al2O3
| Fe2O3
| CaO | MgO | SO3
| |||
3413 | 3.15 | 1.40 | 21.25 | 5.28 | 3.02 | 61.00 | 3.71 | 1.24 |
Surface area (cm2/g) | Density (g/cm3) | Ig.loss (%) | Chemical composition (%) | ||
---|---|---|---|---|---|
SiO2
| MgO | Cl−
| |||
4250 | 2.90 | 0.32 | 21.01 | 6.40 | 0.005 |
Name | Diameter, d
f
(mm) | Length, l
f
(mm) | Aspect ratio (l
f
/d
f
)
| Density (g/cm3) | Tensile strength (MPa) | Elastic modulus (GPa) |
---|---|---|---|---|---|---|
Short HS | 0.55 | 35 | 65 | 7.9 | 1400 | 200 |
Long HS | 0.75 | 60 | 80 | 7.9 | 1100 | 200 |
2.2 Test Setup and Specimen Preparation
2.2.1 Compression
2.2.2 Four-Point Flexure
2.2.3 Three-Point Flexure for Notched Beams
3 Test Results and Discussion
3.1 Effects of W/B and Replacement Ratio of BFS on Compressive Strength
3.2 Properties of SFR-HSC
3.2.1 Compressive Behaviors
Name | Compressive strength (MPa) | Strain capacity (mm/mm) | Elastic modulus (GPa) |
---|---|---|---|
OPC | 67.0 | 0.00310 | 32.0 |
S65-0.5 | 70.3 | 0.00320 | 33.0 |
S80-0.5 | 72.0 | 0.00326 | 32.9 |
S65-0.75 | 67.9 | 0.00292 | 33.0 |
3.2.2 Flexural Behaviors
Name |
F
LOP (MPa) |
F
MOR (MPa) |
δ
MOR (mm) | Tough
L/600 (kNmm) | Tough
L/150 (kNmm) |
F
R,L/300 (MPa) |
F
R,L/150 (MPa) |
---|---|---|---|---|---|---|---|
OPC | 7.0 | 7.0 | 0.063 | – | – | – | – |
S65-0.5 | 7.8 | 8.0 | 0.85 | 10.8 | 48.4 | 8.0 (103%) | 6.8 (87%) |
S80-0.5 | 7.2 | 9.8 | 1.72 | 12.5 | 59.8 | 9.4 (131%) | 9.6 (133%) |
S65-0.75 | 9.2 | 10.0 | 0.87 | 14.1 | 60.9 | 9.9 (108%) | 8.3 (90%) |
3.2.3 Suggestion of Tensile Stress Block for Structural Design
Name |
\( D_{BZ,2}^{f} \) (kNmm) |
\( D_{BZ,3}^{f} \) (kNmm) |
F
eq,2 (MPa) |
F
eq,3 (MPa) |
σ
1 (MPa) |
σ
2 (MPa) |
σ
3 (MPa) |
ε
1 (mm/mm) |
ε
2 (mm/mm) |
ε
3 (mm/mm) |
---|---|---|---|---|---|---|---|---|---|---|
S65-0.5 | 7.7 | 37.1 | 4.93 | 4.75 | 6.92 | 2.22 | 1.76 | 0.00021 | 0.00031 | 0.025 |
S80-0.5 | 10.7 | 56.3 | 6.85 | 7.21 | 7.80 | 3.08 | 2.79 | 0.00024 | 0.00034 | 0.025 |
S65-0.75 | 14.3 | 55.1 | 9.15 | 7.05 | 8.20 | 4.12 | 2.61 | 0.00025 | 0.00035 | 0.025 |