Quote (thesnipa @ May 6 2019 10:29am)
a link would be great, i'd for sure read that.
i'm a bit distracted irl atm, this appears to cover it though. i'll have to take time later on to confirm what is stated in here, but i'll list some of what it says.
https://news.umich.edu/roads-bridges-would-last-longer-save-money-with-new-concrete-formula/Quote
Lower cost for high performance
Ultra high-performance concrete, or UHPC, has been on the market for a while under a small handful of brand names. But high prices have kept it out of widespread use by local, state and federal governments. A municipality looking to replace a bridge or rebuild a crumbling road, might spend $100 to $120 per cubic yard of regular concrete. To upgrade to a brand-name UHPC, that same local government would be looking at paying $2,800 per cubic yard.
So governments are forced to repeatedly fix and replace aging infrastructure, leading to a backlog of roughly $500 billion in critically needed road and bridge repairs. The state of Michigan spends $3.5 billion a year on upkeep, said Steve Kahl, supervising engineer at MDOT.
“Regular concrete will have a strength of about 4,000 pounds per square inch…that’s maybe the weight of an SUV on every square inch,” El-Tawil said. “However, UHPC can support at least 22,000 psi or six times as much.”
Quote
Because of the fibers, the UHPC created at U-M is still more expensive than regular concrete. But it represents a 70-percent price drop from the UHPC brands currently on the market. And as the cost of steel fibers drops with increasing demand, the cost of the U-M concrete would also fall.
“Our UHPC brings down the cost of long-term maintenance,” El-Tawil said. “It’s still more expensive than regular concrete, but if you consider the effect over the lifetime of a bridge, then the cost becomes very competitive. If you have a concrete deck on a bridge that lives for 200 years with little to no maintenance—imagine the cost savings.
from what i can tell, it still costs a bit more using U-M concrete, but it's MUCH cheaper than any other version of UHPC on current market, and projected to be even cheaper in the future.
the cost savings mostly come from it's superior longevity.
i'll come back about this a little more later, got a few things to take care of atm.
This post was edited by tagged4nothing on May 6 2019 10:01am