Table of Contents March 2002

What's the Allowable Fly Ash Limit?

What is the highest percentage of fly ash that can be used in ready-mixed concrete? Is durability the most important issue in determining the limit?

Do Guidelines for Recycled Aggregates Exist?

I work for the Ohio DOT. I am looking for sources of information where recycled concrete (RC) was used as aggregate in new concrete. Have you used recycled aggregate in new concrete? What was the new concrete used for? What problems did you encounter with recycled concrete as an aggregate?

Coming in First by Watching Seconds

Beating Asphalt on Price

Righting Rollovers

Coding it Correctly