Heat curing: tendons cut
Heat curing: tendons cut
(OP)
When heat curing prestressed concrete products (slabs, panels etc), have the tendons to be cut immediately after the heat application or is it necessary to delay the cutting procedure until the concrete is cooled down?





RE: Heat curing: tendons cut
RE: Heat curing: tendons cut
My concern was about shrinkage and possible residual tension rising during the cooling period, so I presumed it was better to cut tendons immediately after the heat application and leave concrete (and tendons) to shrink without any constraints applied.
RE: Heat curing: tendons cut
Shrinkage is not an issue. There will be no residual tension because this is a "prestressed" member. The worst you could get if the coefficients were different would be a very slight loss in perstressing force. The elongation to stress the strand is magnitudes greater than the thermal contraction due to a change of 100 degrees max.