Learn more about the components - Concrete Maturity (ASTM C1074) Monitoring System (using RFID instead of wires)...
Introduction to Concrete Maturity - a detailed guide to using RFID to provide accurate concrete maturity data.
Concrete Maturity Testing in Michigan - February 2004 by Andrew J. DeFinis P.E. A white paper on Wireless Concrete Monitoring System. (PDF file: 4.6 MB) NEW White Paper!
Concrete Solutions - Summer 2003 Edition - by Robert Risser, Jr., Executive Director of Michigan Concrete Paving Association.
New Technology Puts Road Work in the Fast Lane - Reprint of article by David R. Miller, Associate Editor of CAM (Construction Association of Michigan)
Maturity Meters: A Concrete Success - a reprint from the October 2002 edition of FOCUS published by the Federal Highway Administration.
More than thirty years ago, man took a walk on the moon and mankind took a giant leap. Just like Neil Armstrong's walk on the moon was revolutionary, the road construction industry is undergoing its own "revolution" by using new technology to improve their product even more. Where they once used concrete cylinders to determine concrete strength, they now can use a high-tech device called a maturity meter. Tony Angelo Cement Construction Company (TA) of Novi, has taken "one giant leap" for road construction with their use of maturity meters.
TA, who is the paving contractor on the reconstruction and widening of Grand River from Novi Road to Beck Road in Oakland County, is using an innovative and high tech approach to monitoring the progress of concrete strength gain on the project. Working with the City of Novi, their consultant JCK, and the Michigan Department of Transportation (MDOT), they put together a plan to utilize what is called maturity testing of concrete.
Concrete strength is the primary indicator for pavement acceptance, including opening the pavement to traffic. Typically on a project, concrete strength is determined by collecting concrete cylinders or beams in the field and then testing them in the lab after several days of curing. This process can be time consuming and result in motorist inconvenience. Maturity meters offer an alternative to the traditional concrete cylinder testing for strength.
Maturity testing (ASTM C1074) of concrete provides a means of monitoring internal concrete temperature in the field. The basis of maturity testing is that each concrete mix has a unique strength, time and temperature relationship. By developing strength curves in the lab for a specific concrete mix and correlating them to field temperatures of the same mix, the strength of the concrete in the field can be accurately predicted.
To conduct maturity testing, TA embedded several wireless temperature meters into the newly placed pavement. With a handheld computer, data was collected and analyzed to provide a concrete strength value. The information recorded includes the current temperature of the concrete, the temperature when the concrete was poured, the date it was poured, and the dates of when it was previously checked.
The benefit of maturity testing is that it provides immediate and continuous data on the progress of concrete strength gain of the in-place concrete. This is especially important if you need to open the project to traffic quickly or are on a fast track schedule. According to Andrew Definis, Project Engineer for Tony Angelo, they decided to use maturity testing on this project in order to expedite the opening of the entrances to businesses along the project providing customers with access to their shops as soon as possible. "By using the maturity testing, we are able to open the pavement as quickly as possible. "The one - day, two - day, and three - day test results have been very consistent with the lab results. We are also interested in comparing the 28 day results and compare the accuracy of the testing over a longer period of time" said Definis.
Although this is an innovative concept for TA on one of its local road projects, the application of maturity testing is not new to Michigan. In fact, MDOT has used this method before on several concrete pavement projects throughout the state. However, MDOT still uses the cylinder strength test as the standard method for determining early strength. It is hoped that as this technology proves itself, road agencies will embrace this high tech approach to road building. Just like Neil Armstrong taking one small step on the moon was revolutionary, maturity meters may be a "giant leap" for the industry.