"JDC"
I don't think it's the concrete itself, but the manufacturer/supplier. For Silver Spring, wasn't the issue how it was poured on site? i.e. it was done negligently/shoddily? For the Silver Line, it sounds like blatant fraud is the issue.
STrRedWolf's comment should be place in a context of sarcasm.
The issues on each are totally different.
The Silver Spring Transit Center issue was about the post tension reinforcement in the cast in place concrete and how it was not done to designed specification buy the contractor that poured the concrete.
The Silver line Phase II issue is about the supplier of off site manufactured precast concrete panels not following the aggregate, porland and hydration specifications for the concrete mix use in the precast concrete panels.
Turns out I may not have been a bad as originally believed:
Tests: Silver Line concrete problem may not be as bad as feared
Max Smith
WTOP 103.5 FM
07 18 2018 10:26
John in the sand box of Maryland's eastern shore.