![]() I-8 covers 287 miles, connecting San Diego to Arizona, with the Imperial County section constructed during the late 1960s and early 1970s. The life span for CRCP pavement may be up to 70 years, far exceeding current road design. The result is a continuous, smooth-riding surface capable of withstanding the heaviest traffic loads and the most adverse environmental conditions. CRCP naturally forms tight transverse cracks to evenly transfer loads. Oreiro praised Mehdi Parvini, Caltrans Senior Transportation Engineer, who championed the use of a CRCP overlay for the I-8 project. It’s pretty much maintenance-free as there are no lateral joints that we have to reseal periodically.” The overlay is a test of the longevity of concrete pavement. We usually design our concrete projects for a 40-year lifespan. A CRCP overlay had previously been done in Michigan, along with some additional states in the central U.S. ![]() County, but for this many miles and this amount of concrete, this is the biggest. “This was the first big CRCP overlay job in the state,” said Michael Oreiro, P.E., Caltrans Project Engineer for Sections Four and Five, District 11. For Segments Four and Five of the work, Continuously Reinforced Concrete Pavement (CRCP) overlays were placed on top of the existing 50-year-old, un-doweled, jointed plain concrete pavements – JPCP. To reconstruct and rehabilitate 48 mainline miles of Interstate 8 in the eastern part of the Imperial Valley, Caltrans utilized a very innovative approach. Reuse enhances sustainability with more than 200,000 cubic yards of roadway recycled onsite.
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