Wayne Johnson's blog

Hi - hope you are doing well

Your program on PBS twice mentioned the use of fly ash in your concrete.
I think I understand the purpose of fly ash in concrete but can you please
tell me the concrete mix formula you prefer? I usually think of these things
in parts per cubic yard. One formula provided to me elsewhere is - 6 bag,
6 slump, and 6 fly ash, remainder in sand and preferred aggregate. My
preferred aggregate is 1/2 to 1 inch flint rock.
But i became interested in your formula after one of your guests mentioned
fly ash for a second time.

Thank you
Wayne