Fracture Behavior of Site-Casting Dam Concrete

摘要

An experimental investigation of the fracture properties of dam concrete obtained directly from a dam construction site is presented. The specimens were all cast at the construction site of a super-high arch dam. The complete load-crack mouth opening displacement (P-CMOD) curves and fracture parameters for specimens with dimensions of 800 × 800× 450 mm (31.5 × 31.5 × 17.7 in.) at 28, 90, and 180 days and 1000 × 1000 × 450 mm (39.4 × 39.4 × 17.7 in.) and 1200 × 1200 × 450 mm (47.2 × 47.2 × 17.7 in.) at 180 days were obtained. The fracture parameters of the site-casting dam concrete can represent the real fracture properties of the super-high arch dam and can be directly applied to the super-high arch dam. The parameters obtained in this paper are significantly different from those of other studies.