Title: Fracture Behavior of Site-Casting Dam Concrete

Author(s): Qingbin Li, Junfeng Guan, Zhimin Wu, Wei Dong, and Shaowu Zhou

Publication: Materials Journal

Volume: 112

Issue: 1

Appears on pages(s): 11-20

Keywords: complete load-crack mouth opening displacement curve; dam concrete; effective fracture toughness; fracture energy; site-casting; specimen age; specimen size

DOI: 10.14359/51687361

Date: 1/1/2015

Abstract:
This paper presents an experimental investigation of the fracture properties of dam concrete obtained directly from a dam construction site. 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 x 800 x 450 mm (31.5 x 31.5 x 17.7 in.) at 28, 90, and 180 days and 1000 x 1000 x 450 mm (39.4 x 39.4 x 17.7 in.) and 1200 x 1200 x 450 mm (47.2 x 47.2 x 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 superhigh arch dam. The parameters obtained in this paper are significantly different from those of other studies.