Tensile Tests on Articulated Concrete Mattress Specimens

摘要

An investigation was undertaken to determine the feasibility of using crimps in the reinforcement in fabrication of articulated concrete mattress. The crimps would maintain the reinforcement in proper position during casting, thus eliminating the support system currently being used. In contrast to the straight reinforcing, crimps in the reinforcing caused cracking/spalling of the concrete in each panel tested. Overall, the initial concrete cracking/spalling load averaged 2449 lbf or approximately 47 percent less than the ultimate load as determined on panels with straight reinforcing. Overall, the ultimate tensile load of bracket wires with crimps averaged 50 lbf higher than bracket wires without crimps. Similarly, the ultimate tensile load of longitudinal wires with crimps averaged 84 lbf higher than longitudinal wires without crimps. (Author)