What went wrong with M-6, the poster child for concrete failure | MLive.com

What went wrong with M-6, the poster child for concrete failure | MLive.com:
"...M-6 opened to much fanfare in the fall of 2004 — four years ahead of the schedule that was first announced.
Issues arose with the M-6 project ahead of the concrete failure.
The bridge decks on two of the overpasses had to be re-done immediately after they were poured because the wrong concrete was used — and the asphalt portion of the road was in need of repairs seven years after it was built.
In the past six years, $1 million has gone into patching the concrete joints. 
And this summer, $9.5 million is being spent to redo M-6 west of Wilson Avenue.
The portion of M-6 that is being redone this summer amounts to about one-third of the original concrete road.
The road was initially poured in 2003 and 2004 – a 12-mile-long stretch that cost $22 million.
But none of the concrete pavement work — including this summer’s project — has been paid for by the company that built it. 
The work has all been done after the seven-year warranty expired..."