What is the difference between type C fly ash and type F fly ash?

Question

What affect will this have on concrete?

Answer 1

Class F is fly ash normally produced from burning anthracite or bituminous coal, and Class C is normally produced from the burning of subbituminous coal and lignite (as are found in some of the western states of the United States) (Halstead 1986). Class C fly ash usually has cementitious properties in addition to pozzolanic properties due to free lime, whereas Class F is rarely cementitious when mixed with water alone.

Answer 2

Class C Fly Ash

Answer 3

Some years back I kept a Praying Mantis as a pet, and they only eat live food! Consequently, I acquired the skill of GENTLY capturing live flies in flight, or off any surface, so that I could feed my Mantis uninjured and active prey. Most moving incident was late one night when on arrival home I found my Mantis shedding its skin. I watched, enthralled, for over an hour and I shall never forget seeing my Mantis gradually extend and spread its brand new rainbow-shimmering wings. Next day I released it onto a grapevine in my garden, the same garden in which I subsequently found a swarm of very tiny, recently hatched mantids! They are the cutest little creatures you could ever imagine.