Determination of the Fracture Energy of Concrete: A Comparison of the Three-Point211 Bend Test on Notched Beam and the Wedge-Splitting Test. NORTEST Project No. 1327-211 97

摘要

The fracture energy of concrete, mortar and similar materials can be determined211u001eby means of various methods. The three-point bend test (TPBT) on notched beam and 211u001ethe wedge-splitting test (WST) are two methods for determination of the fracture 211u001eenergy. This report, which is a compilation of the results of a Nordtest joint-211u001eproject, compares the above methods with regard to the results of measurement, 211u001ethe reliability of measurement, and the simplicity of application. The project 211u001estarted in January 1997, with the Department of Structural Engineering and 211u001eMaterials at the Technical University of Denmark (DTU), the Department of Cement 211u001eand Concrete SINTEF Civil and Environmental Engineering-Norway, and SP Swedish 211u001eNational Testing and Research Institute, as participants. The fracture energies 211u001eobtained from the TPBT are, on average, somewhat higher than those obtained from 211u001ethe WST. The average difference is, however, insignificant, i.e. the methods 211u001eyield similar results.