Civil Engineering Reference
In-Depth Information
12
10
8
6
4
2
0
0
2
4
6
8
VPV %
10
12
14
16
Figure 7.13
Comparison of chloride diffusion coefficient with VPV. (From Sherman, M. R.
et al.,
PCI Journal
, 75-85, July-August 1996.)
12
10
8
6
4
Water
Burlap
Heat
2
0
0.3
0.32
0.34
0.36
0.38
w/c Ratio
0.4
0.42
0.44
0.46
0.48
Figure 7.14
The effect of curing on VPV. (From Sherman, M. R. et al.,
PCI Journal
, 75-85,
July-August 1996.)
sorptivity. It is not the total porosity per se that determines durability but the
rate of water and salt ingress. It is possible to have hydrophobic, lightweight,
or high SCM replacement concretes with excellent durability but with a rela-
tively high total porosity. Accordingly, the porosity tests are not particularly
appropriate for assessing durability in severe environments but can be used
as a quality control tool. The more information the better, within reason.
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