Have an attendance code? Sign In to enter it. This live web event has ended. Thank you for attending. Contributors David Flax, CCPR/CSI David Flax of The Euclid Chemical Company has a Civil Engineering Degree from RPI and over 35 years experience as a field engineer, a contractor, and a researcher with the Corps of Engineers. He has earned his CDT and CCPR from CSI. He has specialized in concrete and has had dozens of articles published. He was awarded the Extra Yard Award by the SCCP for his 30+ years of service to the concrete industry. He is on a number of national organization committees including the “Guide Specifications", "Materials and Methods”, and “Repair of Construction Defects". He has spoken on these topics and others at The World of Concrete.