COMBINED EFFECT OF CRACKING AND WATER PERMEABILITY OF CONCRETE

摘要

The goal of the research presented here was to study the relationship between cracking and water permeability of normal strength concrete. A feedback-controlled wedge splitting test was used to generate width-controlled cracks, and speckle interferometry was used to record the cracking history. Water permeability was evaluated by a low-pressure water permeability test (WPT) for loaded specimens at the designed crack mouth opening displacements (CMOD). The experimental results showed that water permeability of cracked material significantly increased with increasing crack width, and flow was quite repeatable for the same cracking level. Experimentally measured flow was compared to theoretical models of flow through cracked rocks with parallel walls.