High Performance Concrete
Projects such as bridge deck overlays and tunnel linings require concrete or shotcrete strengths in excess of 10, 000 psi. Very low water to cement ratios are used to achieve high strengths, in conjunction with additives like Silica Fume, along with plasticizers, retarders, and air entrainment admixes. Stringent QA/QC measures are critical to achieve consistent results no matter where it is produced. Bridge deck overlays have been done in Anchorage, Cantwell, Hurricane Gulch, and Dutch Harbor. Shotcrete with steel fibers was produced on-site for the Whittier tunnel, and during the winters of 2003, 2016, and 2017 we consistently produced concrete and shotcrete with super bags for Lowell Cr Tunnel in Seward in excess of 12,000 psi in the dead of winter.