To explain loading history, beam specimen B-0.6P20C was taken as an example.
The maximum crack width of specimens B-0.4P1C, B-0.4P5C, and B-0.4P10C was below 0.2 mm when the cyclic loading was 0.4[P.sub.u].
Figure 6 shows the chloride profiles of beam specimen B-0.4P5C.
Specimens B-0.4P20C and B-0.5P5C were taken as example.
From Table 7, the maximum crack width of specimen B-0.4P1 was less than 0.2 mm; however the reduction of yield load and ultimate load exceeded 5% and the reduction of ductility ratio exceeded 20%.
Caption: Figure 6: Chloride profiles of beam specimen B-0.4P5C.