United States Department of Transportation
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Edition:Final Report (2011-2017)
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Abstract:With a growing amount of highway infrastructure in need of reconstruction or rehabilitation and ever-increasing construction costs, State Agencies are seeking cost effective methods of increasing the service life of infrastructure and reducing construction times. Prefabricated elements and systems, such as deck panels and stay in place forms, have many advantages including less disruption to the traveling public and environment, rapid deployment, and are manufactured under a controlled environment. However, there are other considerations such as planning, handling and transport, modular integration, and proper placement. In an effort to decrease construction times and improve overall quality, Fort Miller Co., Inc. has developed a product known as “Super-Slab,” a pre-cast pavement system. Once cast and cured at a concrete plant, the slabs are placed upon an engineered subgrade and then grouted into place with a bedding grout distribution system. Fort Miller Co. provides both engineering design and installation guidance in conjunction with the process. Slab dimensions are reportedly accurate to within ± 1/8 in. This system is designed for use as bridge approaches, ramps, intersections, and continuous mainline pavements. Super-Slabs were used in Vermont in 2011 as the approaches to two bridges in Chester. This report describes the construction and performance experience with these two installations.
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