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A sample of test concrete shows the warm joint between two lifts is almost seamless. (U.S. Army Corps of Engineers photo by Jon Fleshman)
A sample of test concrete shows the warm joint between two lifts is almost seamless. (U.S. Army Corps of Engineers photo by Jon Fleshman)

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Photo by: Jon Fleshman |  VIRIN: 130206-A-XN645-019.JPG