Concrete Pavement Progress www.acpa.org 10 » continued from page 8 we had those trucks available for other uses during construction,” saidMatt Alwardt, Paving Operations Manager for Millstone Weber. “We preblended the coarse aggregate stockpiles for concrete manufacture and utilized a vertical smart stacker to maintain the quality of the blended product.” One innovation that helped keep the project on schedule was provided by Andale Construction. Plans called for a cement-stabilized subgrade, but rather than use traditional soil-stabilizing methods, a superslurry cement was injected into the soil. “Benefits of this process include safety for workers and the environment because it is 100% dustless, and it is a minimum of 200% faster at getting cement in the ground because we hydrate 100% of the cement,” said Matt Munsick, Vice President of Andale Construction. “We can incorporate other products for stabilization such as lime and fly ash, and we are more accurate in the distribution of cement and water in the process.” Two batch plants on site, along with careful sequencing of work, allowed contractors to pave with no delays. Crews worked from the south end of the runway to the north with demolition, grading, and paving occurring simultaneously, said Luke Beach, Project Manager for R.C. Construction. This made the use of the superslurry injection technology even more critical because there was no dust that created safety hazards for the other crews on the job site, he added. A number of factors contributed to the project’s completion under budget and on time, said Jay Warren, Director of Construction for R.C. Construction. Stockpiling and preblending aggregate, two batch plants, carefully sequenced demolition, grading, and paving operations, and injection of superslurry to stabilize the subgrade all were important, but the six months of pre-construction planning and preparation was essential, he said. “It was a great partnership of contractors, U.S. Army, and airfield representatives, with everyone working together toward one goal.” “Benefits of this [superslurry] process include safety for workers and the environment because it is 100% dustless, and it is a minimum of 200% faster at getting cement in the ground because we hydrate 100% of the cement.” P O P E A R M Y A I R F I E L D R U N W A Y
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