I-94, Allington Road to Gratiot Avenue in St. Clair County
The I-94 project involved just over 6 miles of reconstruction of mainline concrete pavement from Allington Road to Gratiot Avenue in St. Clair County, as well as the interchange ramp at Wadhams Road. The project is part of the first full revitalization of the I-94 corridor originally constructed in 1963, after 45 years! MDOT is replacing the original 14 miles of freeway between Marysville down to Lenox Township. This section of I-94 is a heavy traveled roadway for both interstate and international commerce seeking the most direct route between Detroit and Port Huron. Signs and message boards were installed well before heavy construction started to help keep the traveling public notified of traffic switches and lane restrictions. Crossovers were built and two-way traffic was maintained on eastbound I-94, while westbound I-94 was being constructed in Stage I. In Stage II, the traffic was switched to the new westbound pavement. One noticeable benefit of this new concrete pavement is the superior ride quality that it provides. MDOT's ride quality standard for this project required a smoothness measurement of less than 30 inches/mile and John Carlo, Inc. (JCI) was able to achieve an average of 18 inches/mile, well below the required maximum limit. JCI utilized a high performance P1 modified concrete mix on this project which provided a workable and easily finished mix, further contributing the excellent ride quality.
Premiere Concrete Admixtures supplied the project with ConAir® 260, an air entrainment specially designed for the paving market. In recent years many air entrainments have been inconsistent resulting in higher and higher dosages with constant adjusting. It had been very difficult for pavers to be able to accurately estimate usage for the projects, before the introduction of ConAir® 260. ConAir® 260 averages a dosage range of 1.0 – 1.8 oz per cwt. consistently whether the mix is straight cement, or whether supplementary cementitious materials are added.. In addition John Carlo selected Optiflo® 500 for their low range water reducing and set control needs from 2 – 4 oz/cwt and OptiFlo® MR for enhanced finishability on all hand work.
John Carlo Inc.
Michigan Department of Transportation