1 Introduction
2 Probabilistic Analysis of Durability Life
2.1 Modeling Chloride Penetration
2.2 Equivalent Diffusion Coefficient
2.3 Probabilistic Approach
3 Experimental Program
w/c | Cement | Water | Sand | Gravel |
---|---|---|---|---|
0.30 | 420 | 126 | 684 | 1217 |
NaCl | MgCl2 | Na2SO4 | CaCl2 | KCl | NaHCO3 |
---|---|---|---|---|---|
24.53 | 5.20 | 4.09 | 1.16 | 0.70 | 0.20 |
Crack width (mm) | Averaged diffusion coefficient (m2/s) × 10–12 | Surface chloride concentration (kg/m3) |
---|---|---|
0 | 0.64 | 3.21 |
0.01 | 0.74 | 3.33 |
0.03 | 0.92 | 3.35 |
0.05 | 1.13 | 3.36 |
0.08 | 1.39 | 3.43 |
0.11 | 1.65 | 3.45 |
0.14 | 1.98 | 3.54 |
0.16 | 2.39 | 3.78 |
0.18 | 3.09 | 3.92 |
0.22 | 3.50 | 4.00 |
0.26 | 4.10 | 4.12 |
0.30 | 4.62 | 4.24 |
Variable | Description (Source) | Mean | COV | Distribution |
---|---|---|---|---|
Cs (kg/m3) | Surface chloride concentration (Model test) | 3.64 | 0.12 | Lognormal |
Cth (kg/m3) | Chloride threshold value (Kwon et al., 2009) | 1.2 | 0.20 | Uniform |
c (mm) | Concrete cover depth (Model test) | 45 | 0.18 | Normal |
Dref (m2/s) | Effect diffusion coefficient (Model test) | 0.93 × 10–12 | 0.20 | Lognormal |
m | Aging factor (Kwon et al., 2009) | 0.20 | 0.20 | Normal |