Fast Track Rehabilitation & Preservation Concrete Transportation Infrastructure
For almost 40 years Twining has been involved in the research and development of rapid and ultra-rapid strength concrete (RSC) for emergency and planned repair and rehabilitation of transportation infrastructure. RSC gains compressive strength of 2500 – 3500 psi and flexural strength of at least 400 psi in 1.5 – 4 hours. In 1998 Twining developed and introduced to the construction industry nation-first mobile laboratories. These autonomous testing units allowed validating the strength of RSC on-site before opening transportation corridors to traffic and became a turning point in expanding the practice of fast-track rehabilitation of pavements and bridges. Results of our laboratory and field studies are widely published and presented nationally and internationally. We provided near 100 training seminars to the industry.
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Twining mobile laboratories are equipped to test fresh and hardened RSC. Curing of specimens is performed in conditions matching the temperature of RSC in place.
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Fast-track construction of bridge hinges using rapid strength concrete.
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Emergency repair of airfield pavement. Ultra-rapid hardening concrete with calcium-sulfoaluminate cement is often produced with volumetrically measuring and continuously mixing mobile units.
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Placement of the last truckload of RSC during a historic nation and California-first 55-hrs weekend rehabilitation of a pavement segment on RTE-10 in Pomona, in 1999. For this project, Twining received the ACPA National Award of Excellence.