The spall repair sequence currently used is as follows. The damage is removed from the area with heavy equipment and fresh concrete is poured into the cleaned section. A curing compound is then applied to the patch to prevent drying shrinkage or to absorb water. But this spall repair method requires a great deal of equipment and time. During the repair process, adjacent roads must be closed in order to secure a working space, often resulting in traffic congestion. According to a report by the US Department of Transportation, the depreciation can be up to $20,000 a day due to traffic jams. The depreciation can easily reach up to $140,000 when a road is blocked for seven days to repair a spall. The objective of this research is to see if 3D printing technology can be used to repair spall damage on a concrete pavement. More specifically, this study, using a simple finite element method, investigates whether the bond line thickness will have an influence on shear strength development when an adhesive layer is present between the spall and the 3D printed concrete segment. In addition, this study proposes a modified test method of ASTM C882 to experimentally investigate the influence of bond line thickness of epoxy-resin adhesive on shear strength when the glue applied to a concrete adherend.
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