The ACI Greater Michigan Chapter, together with the ICRI Michigan Chapter, and our meeting sponsor, Premiere Concrete Admixtures, invite you to join us Tuesday, April 12, 2016, for a look at Maturity. When concrete hardens (cures), it gives off heat proportional to its curing rate. By learning how much heat is released, an accurate estimate of the in-place concrete strength can be determined. Generally, concrete in a structure cures at a MUCH faster rate than concrete in a test cylinder. This is due to the much larger mass of the structure, and better hydration which aids curing.
When determining the early-age strength of cast-in-place concrete, reliance on test cylinders can lead to problems. For example, if test cylinders are cured at a lower temperature than the structure, the cylinders would underestimate the strength of the slab, which means that critical construction operations are delayed unnecessarily. Or conversely, if the deck is cooler than the cylinders, the cylinders would overestimate the strength, a clear safety concern. Maturity testing monitors the curing of the structure and compares it to the cylinder, to more accurately track strength gain in the structure, in real-time, improving both safety and construction operations. Maturity Testing has been a recognized ASTM Standard practice (C1074) for over 30 years.
Using case histories and real-world examples, our speaker, John Gnaedinger, will discuss some of the productivity and safety advantages of using maturity on your next job. The meeting will then be opened up for general discussion.
John Gnaedinger was the founder and president of Con-Cure Corporation, which conducted more than 25,000 concrete maturity tests covering many high-risk applications across the globe, including post-tensioned structures, concrete bridges, mass concrete and high-rise buildings over the past 20 years. Con-Cure was recently acquired by Premiere Concrete Solutions, a large Ohio firm specializing in innovative concrete technologies, where he serves as the Director of Engineering Services. He is a member of the American Concrete Institute, where he is a voting member of the ACI Cold Weather committee 306. He also serves on the Cold Weather committee of the Concrete Foundations Association, and is active in the Concrete Council of St. Louis.
Douglas C. Wittler is the President and co-founder of Premiere Concrete Solutions and Premiere Concrete Admixtures. He has been in the concrete industry for 30 years and has served on numerous board of directors and ACI committees. Recently Mr. Wittler has focused on the advancement of hardware and software development to advance the concrete industry. He holds a Masters degree in Business Administration from the University of Toledo.
5:30 p.m. – Social Hour/Cocktails
6:30 p.m. – Dinner
7:30 p.m. – Presentation
- Registrations received after Friday April 8, will incur a $5.00 late registration fee.
- ACI GMC members receive a discounted registration fee, and must be logged into the website to receive this discount. Not a member? Why not join now and take advantage of the reduced membership registration. Click here to fill in a simple online application then return to this page to complete your meeting reservation.
- To receive the reduced ACI GMC Student Member registration rate, the registrant MUST be a Student Member of the ACI Greater Michigan Chapter. Student membership in the ACI Greater Michigan Chapter is free. Apply here for your free student membership.
- Cancellations received by 11:59pm on Monday, April 11, 2016 will be accepted with a 100% credit of the registration rate to your ACI GMC account, available to be used for a future meeting registration. Refunds will not be given.
- Cancellations received on or after Tuesday April 12, 2016, or no-shows at the meeting, will not receive a credit or a refund.
- Unpaid cancellations received on or after Tuesday April 12, 2016 or unpaid no-shows will be invoiced and the registrant will be expected to pay the full amount of the invoice.