RILEM Standard: testing methods for determination of the double-K criterion for crack propagation in concrete using wedge-splitting tests and three-point bending beam tests, recommendation of RILEM TC265-TDK

• DOI: 10.1617/s11527-021-01786-8
• Publication Date: 2021-11-15T11:03:29Z
• Authors: Shilang Xu; Qinghua Li; Yao Wu; Lixin Dong; Yao Lyu; Hans W. Reinhardt; Christopher K. Y....; Gonzalo Ruiz; Shailendra Kumar; Shaowei Hu
• Keywords: Wedge (geometry)

Abstract In this recommendation, standard testing methods for determination of the double-K criterion Mode I crack propagation in concrete using wedge-splitting tests and three-point bending beam are specified fracture parameters initial cracking toughness $$K_{Ic}^{ini}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mrow> <mml:mi>Ic</mml:mi> </mml:mrow> <mml:mi>ini</mml:mi> </mml:msubsup> </mml:math> unstable $$K_{Ic}^{un}$$ <mml:mi>un</mml:mi> . Along with recommendation methods, theoretical background criterion, calculation results round-robin determining presented technical reports [1, 2]. The includes geometry specimens, fabrication machine, load transmission system supports, measuring instruments, P ini , measured maximum max compliance c i test test, as well report forms. According to these can be used describe onset cracking, or failure predicting initiation, structure stability structures.