When internal frost damage is observed in real concrete structures, the usual pattern is cracks with a preferred orientation parallel to the exposed surface. When exposing concrete with poor frost resistance to a standardised freeze/thaw test in the laboratory, the orientations of the resulting cracks are more or less random. The present study is an experimental study, which aims at investigating the influence of confinement during freeze/thaw action on the developed crack pattern. Confinement is established by mounting hose clamps on cylindrical test specimens, using similar test specimens without hose clamps as reference. The results show that confinement can change the outcome of a freeze/thaw test as regards extent of internal cracking, crack orientations, and amount of surface scaling. Thus it seems likely that the difference in confinement (and therefore also in stress state) can explain the different crack patterns observed in the field and in the laboratory.
|Title of host publication||Proceedings of the International RILEM Conference Materials, Systems and Structures in Civil Engineering 2016 : Segment on Frost Action in Concrete|
|Publication status||Published - 2016|
|Event||International RILEM Conference on Materials, Systems and Structures in Civil Engineering - Technical University of Denmark, Kgs. Lyngby, Denmark|
Duration: 15 Aug 2016 → 29 Aug 2016
|Conference||International RILEM Conference on Materials, Systems and Structures in Civil Engineering|
|Location||Technical University of Denmark|
|Period||15/08/2016 → 29/08/2016|