Boston's Big Dig: An Engineering Tragedy?

Did anyone look at the epoxy itself ,were the temperatures critical were the batch numbers ever anylized for effectiveness .Or were the same standards applied as was the concrete.

Maybe the solution is not hang 12 ton slaps above highway tunnels, is there one reason for them to be up there in the first place? besides for looks seems to me gunite would be the simple and cheap solution.

That is exactly my argument. …and wouldn't the cheap and easy (also safe) way to fix it be to use the existing brackets and replace the 12 ton concrete slabs with much lighter fiberglass. This is what I see as being a common future in engineering, bureaucracy and corruption driving the projects, not the engineers. We had a family of "big dig workers" move into our neighborhood a mere 150 miles outside of Boston. 1 or 2 of them would head to the job site for a few hours everyday. The rest would stay at home and work on fixing up the house they lived in so they could flip it and move on to another. The local media recently exploited big dig workers who put their children on the payroll. The simple fact that so many people stole from this project should make them 100% responsible for fixing it. Thousands of people became millionaires off the big dig and all that cash should be taken back.

I thought there was some reason the cielings needed to be strong enough to allow a big airflow to run through maybe fiberglass couldn't handle the job .Although I'd guess the choice of concrete had more to do with someone making some more money and the added benifit it gave the workers a great place to hide so they wouldn't have to do much .