In addition, it was observed that the
bitumen coating layer had separated from the non-cured cylinders. Conversely,
no deterioration was observed for the cylinders coated with epoxy and silane. Furthermore,
at lower w/c = 0.45, less degradation was observed for the non-coated
cylinders and those coated with acrylic. No separation of the bitumen layer
occurred for the non-cured concrete cylinders made with w/c = 0.45.