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Indexed by:期刊论文

Date of Publication:2015-01-01

Journal:ACI MATERIALS JOURNAL

Included Journals:SCIE

Volume:112

Issue:1

Page Number:11-20

ISSN No.:0889-325X

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

Abstract: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 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 super-high arch dam. The parameters obtained in this paper are significantly different from those of other studies.