Abstract
The researches on micromechanical properties of concrete subjected to freeze-thaw cycles are few. Under freeze-thaw action, the changes of micromechanical structure and mechanical properties of mortar and interfacial transition zone (ITZ) were characterized by nanoscratch. The volume fraction of micropores increases almost linearly, up to approximate 45%. Moreover, the scratch hardness of different micro-phases in mortar and ITZ decreases gradually with the increase of freeze-thaw cycles, which can be attributed to the increase of micropores. In addition, the thickness of the ITZ gradually increases to 60 um under 1500 F-T cycles, which is consistent with the results using SEM.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call