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.
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.
Fast-track construction of bridge hinges using rapid strength concrete.
Emergency repair of airfield pavement. Ultra-rapid hardening concrete with calcium-sulfoaluminate cement is often produced with volumetrically measuring and continuously mixing mobile units.
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.