Fracture Energy of Foamed Concrete Based on Three-Point Bending Test on Notched Beams. (2015)

• Record Type: Journal Article
• Authors: Kozłowski, Marcin; Kadela, Marta; Kukiełka, Alfred
• Is Part Of: Procedia engineering. Volume 108(2015)
• Page Start: 349
• Page End: 354
• Publication Date: 2015
• Subjects: fracture energy -- foamed concrete -- three-point bending -- notched beams; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.06.157
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: A series of static loading tests was performed to determine the fracture properties of foamed concrete of varying density. Beams with dimensions of 100×100×840 mm with a central notch were tested in three-point bending. Then, remaining halves of the specimens were tested again as un-notched beams in the same set-up with reduced distance between supports. The tests were performed in a hydraulic displacement controlled testing machine with a load capacity of 5 kN. Apart from measuring the loading and mid-span displacement, a crack mouth opening displacement (CMOD) was monitored. Based on the load – displacement curves of notched beams the values of fracture energy and tensile stress at failure were calculated. Subsequently, the flexural tensile strength was obtained on un-notched beams with dimensions of 100×100×420 mm. Moreover, cube specimens 150×150×150 mm were tested in compression to determine the compressive strength.