Another Bridge Collapses on Busy US Interstate

April 3, 2019 Karli Langner

A concrete bridge railing collapsed in Chattanooga, Tennessee on I-75 Southbound towards Atlanta on Monday. The bridge section fell on one car, injuring the driver. Investigators are trying to determine what caused the collapse. Officials told CNN affiliate WTVC-TV that it's possible an oversized truck hit the railing and knocked it off, but so far no such vehicle has been found. The railing from I-75 fell onto the I-24 ramp, according to the Tennessee Department of Transportation. Chattanooga Mayor Andy Berke said on Twitter the I-75 and I-24 split is "one of the most heavily trafficked intersections in the country."

In an article dated April 1, 2019, on CNBC, “More than 47,000 of America’s 616,087 bridges are ‘structurally deficient,’ according to an analysis of federal data by the American Road & Transportation Builders Association. (ARTBA)” The article also says, “Nearly 235,000, or some 38 percent of all U.S. bridges, need repair, replacement or major rehab.”

Per ARTBA, it will cost nearly $171Billion to repair all these bridges and at the current rate of repair, it will take 80 years to repair or replace these bridges. ARTBA’s goal is to increase the infrastructure investment and help speed bridge repairs. The US Chamber of Commerce is requesting an increase in the gas tax by 25 cents/gallon. Presidential candidates are weighing in as they announce their candidacies by focusing their campaigns on an infrastructure plan.

One Command Alkon customer, Thomas Concrete, was involved in the quick repair of the Atlanta I-85 bridge, which collapsed due to a fire below the bridge. The estimate to repair 350 feet of the bridge in each direction was 11 weeks. Typical repair would run 24 – 36 months, but time was of the essence. Working closely with the project team and GDOT, Thomas Concrete was able to complete the repairs in 42 days working 24 hrs./day for 7 days/week. Two and one-half days after the initial meeting of all parties involved, Thomas Concrete was pouring the columns for the bridge.

They used a special blend of concrete with micro-fibers and other chemicals to ensure the concrete wouldn’t shrink or crack. Thomas Concrete used Command Alkon’s COMMANDseries solution, which offers ready-mix producers end-to-end coverage of a project: quote, order, ticket, deliver, and bill quality concrete. COMMANDseries integrates with other Command Alkon solutions for batching, quality control, in-cab telematics, mobility, enterprise content management, and business intelligence, allowing users to share data across all aspects of an operation to reap efficiencies. Thomas Concrete worked around the clock to make sure the concrete mix and quality was correct. The project was successful because of the ability to share information among all the parties involved, improving communication and efficiencies.

Companies that are helping repair bridges can also use Command Alkon’s COMMANDassurance. It captures real-time and historical material science data on the concrete properties of a load from the time of loading through placement, slump, temperature, volume, drum rotation, and other information that summarizes the overall workability of the concrete. These notifications and displays indicate when the load is ready to leave the yard, when it is ready for discharge, how much water was added, and other key factors. The result is saved delivery costs for construction professionals and less time spent performing adjustments in transit and conducting tests while at the jobsite.

COMMANDassurance gives you real-time visibility of concrete properties in transit, helping to eliminate waste and save on material costs by improving product quality. COMMANDassurance gives users a constant view into the workability of fresh concrete throughout the entire delivery cycle. Concrete telematics data from the drum is available in real-time to drivers, dispatch and production, helping to ensure the concrete arrives in the best quality available.

Been contracted to update bridges in your area? Command Alkon can help increase your productivity and efficiencies while lowering costs and speeding project time.

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