Fly Ash and Pervious Concrete
Fly Ash and Pervious Concrete
(OP)
Can someone point out to me the different between Class C and Class F Fly Ash? In my research it appears to be the difference in curing time only but wondering if there is a larger issue.





RE: Fly Ash and Pervious Concrete
Thank you everyone.
RE: Fly Ash and Pervious Concrete
RE: Fly Ash and Pervious Concrete
https://secure6.astm.org/STORE/review_order.html
100 in/hr is not unreasonable. It needs to be initially high as it will decrease rapidly with time.
RE: Fly Ash and Pervious Concrete
In the end, how many inches per hour your concrete should convey should probably be dictated by your site hydrologist, based on the design storm. But that presumes the guy who wrote the regulations has some sense, which isn't always the case.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Fly Ash and Pervious Concrete
Generalizations are made about the effect of fly ash on concrete properties, but fly ash from different sources is highly variable in both classes. Its affect on various concrete properties is also highly variable depending on the specific fly ash used. Therefore, generalizations are helpful for determining what affects a particular fly ash might have, but the affect on concrete properties must be determined by trial batching.
RE: Fly Ash and Pervious Concrete