Schedule
8:00 – 8:30 | Registration and Breakfast (Chick-fil-A)
8:30 – 9:30 | Air Content in Concrete and What You Need to Know
G. Terry Harris Sr. – Senior Director, Technical Service & Ductilcrete Slab Systems, Chryso Inc (formerly GCP Applied Technologies, 28 years)
9:45 – 10:45 | Recent Changes to Industry Standards to Support Sustainability
Colin L. Lobo, Ph.D., P.E. – Executive Vice President, Engineering Division, National Ready Mixed Concrete Association
11:00 – 12:00 | Impact of Initial Curing of Cylinders on Concrete Strength
Anton Schindler, P.E. – AU Director, Highway Research Center & Mountain Spirit Professor
12:00 – 12:45 | Lunch
1:00 – 2:00 | Concrete Solutions for Data Centers and Large Projects
Andreas Tselebidis – Director, Concrete Solutions & Commercial Development
2:15 – 3:15 | Type IL Cement: Recommended Specifications to Ensure a Successful Concrete Project
Ryan Betz – Buzzi Unicem USA
3:30 – 4:20 | Panel Discussion with All Speakers, Moderated by Joe Kelley, ACIA
Speakers
G. Terry Harris Sr.
Senior Director, Technical Service & Ductilcrete Slab Systems, Chryso Inc (formerly GCP Applied Technologies, 28 years)
G. Terry Harris Sr. –Terry started in the concrete industry in 1979 and has enjoyed 46 years of experience with ready mix, precast, masonry, testing labs and admixtures. Terry is an active participant in ACI, ASTM, NRMCA, NPCA, ACPA, ACI Concrete Innovation Council and the RMC Foundation Advisory Council. Past Chair of ACI Certification Committee, ACI 305 Hot Weather and the Fellows Nominating Committee and past member of the ACI Board of Directors. Current Chair of ASTM C09.23.03, Chemical Admixtures and Chair of ACI 212 Chemical Admixtures. Terry is a member of numerous other ASTM, ACI, NPCA committees and the NRMCA RES Committee. Terry has a degree in Concrete Technology from Daytona State College and is an ACI Fellow.
Colin L. Lobo, Ph.D., P.E.
Executive Vice President, Engineering Division, National Ready Mixed Concrete Association
Colin L. Lobo is the Executive Vice President of the Engineering Division at the National Ready Mixed Concrete Association (NRMCA) in Alexandria, VA, where he oversees research, standards, technical training, certification programs, and advocacy for sustainable concrete practices. An active member of ASTM, ACI, and ASCE, he has contributed to numerous technical committees, task groups, and research panels, and is a Fellow of both ACI and ASTM. He holds a B.Eng. from Mysore University, an M.S. from Northeastern University, and a Ph.D. from Purdue University, and has authored multiple technical publications. Licensed as a professional engineer in Maryland, he has been with NRMCA since 1991 and has received numerous awards from industry organizations.
Anton Schindler, P.E.
Mountain Spirit Professor (Structural), Civil and Environmental Engineering – Auburn University; Director, Highway Research Center
Anton K. Schindler is a renowned structural engineer and leading authority on concrete performance and durability, with a particular focus on the early-age behavior of advanced concrete systems. As Director of Auburn University’s Highway Research Center, he drives cutting-edge research in high-performance concrete, innovative testing methodologies, and computational modeling that shapes the next generation of resilient infrastructure. Dr. Schindler earned his Ph.D. and M.S. in Civil Engineering from the University of Texas, complementing his B.S. and Honors Degree in Structural Engineering from the University of Pretoria. His work seamlessly integrates pioneering scholarship with transformative real-world applications, cultivating industry partnerships, mentoring emerging engineers, and elevating the safety, longevity, and sustainability of transportation systems.
Andreas Tselebidis
Concrete Solutions & Commercial Development – New York City
Andreas Tselebidis is a globally recognized expert in concrete technology, leading the development and implementation of innovative concrete solutions for both signature superstructures and everyday applications. With over 24 years of experience across Master Builders Construction Chemicals, SRM Concrete, and SIKA Corporation, he has shaped groundbreaking projects including Burj Khalifa, Kingdom Tower, 432 Park Avenue, One World Trade Center, and Hudson Yards. Tselebidis holds a Master of Science in Civil Engineering and completed doctoral studies at the University of Siegen, Germany, and is credited with more than 50 technical publications, nine patents, and ten world records in concrete technology. His pioneering contributions have earned him recognition from Engineering News-Record as a Top 25 Newsmaker and the prestigious “Epaminondas Melo do Amaral Filho” Award in Latin America, cementing his influence on the advancement of durable, high-performance concrete worldwide.
Ryan Betz
Manager of Technical Services, Buzzi Unicem USA
Ryan Betz is a highly accomplished concrete and cementitious materials professional with over two decades of industry leadership in technical services, mix optimization, and quality assurance. He has held pivotal roles at Buzzi Unicem USA, Argos USA, and Lafarge North America, providing expertise in ready mix, precast, paving, soil cement, and research-driven product development. Ryan is deeply engaged in shaping the industry through active participation in the Portland Cement Association (PCA), Slag Cement Association, ASTM, and ACI International, holding leadership roles including PCA PLC Subcommittee chairman, ASTM C01.95 vice-chair, and committee positions guiding the selection and use of hydraulic and slag cements. Regionally, he contributes to the Georgia Chapter ACI, Alabama Concrete Industries Association, and Mississippi Concrete Association. His credentials include NRMCA Level 2 & 3 Technologist, Pervious Concrete Technician, and multiple ACI laboratory and strength testing certifications. Throughout his career, Ryan has excelled in technical sales support, batch plant audits, CCRL inspection, aggregate testing, and value-added product development, combining practical experience with standards-driven leadership to advance concrete performance and innovation.
This spring seminar brings together leading experts in concrete technology and sustainable design for a full day of professional learning, offering 7 PDH. Topics include Air Content in Concrete and What You Need to Know with G. Terry Harris Sr., Recent Changes to Industry Standards to Support Sustainability with Colin L. Lobo, Ph.D., P.E., Impact of Initial Curing of Cylinders on Concrete Strength with Anton Schindler, P.E., Concrete Solutions for Data Centers and Large Projects with Andreas Tselebidis, and Type IL Cement: Recommended Specifications to Ensure a Successful Concrete Project with Ryan Betz. Attendees will gain practical guidance for applying these insights to real-world projects.
The day concludes with a panel discussion featuring all speakers, moderated by Joe Kelley of ACIA, providing an interactive forum to ask questions, discuss challenges, and share perspectives on advancing performance, resilience, and sustainability in the built environment. Registration includes breakfast and lunch, offering both professional development and opportunities to connect with peers in the industry.
