It's exciting to see the foundation being poured on our green-built house in Bloomington, Indiana. Here, Mick's crew from TPC (Trevor Powell Concrete in Gosport, Indiana, pours the foundation footer,using concrete composed of recycled slag and fly ash.
Using recycled slag, a waste of steel manufacturing, reduces landfill waste and adds to the strength of the concrete.
Fly ash is a byproduct of coal-fired plants, and using it as a component in concrete:
- Improves the performance of the concrete
- Reduces the amount of Portland cement (hydrated lime) required in the concrete mix
- Portland cement is hydrated lime, and is very energy-intensive to produce. Using it in reduces landfill and groundwater pollution, as the fly ash would normally just be dumped.
Using fly ash also allows us to gain points in the LEED certification process. These guys are doing a great job on our foundation, and have accommodated our request for recycled material cheerfully.