Simplified DEWS test for steel fibre-reinforced concrete characterisation

Abstract Fibre Reinforced Concrete (FRC) is internationally recognised as a structural material in the fib Model Code 2010 and at national level recently published ABNT standard NBR 16935, which establishes design procedure based on post-cracking parameters. This publication should foster an increase number of applications FRC Brazil next years. In this context, many researchers have investigated use DEWS test for characterisation alternative to three-point bending (3PBT) usually recommended by standards. The conducted applying compressive load specimens with triangular grooves that induce pure mode‑I tensile fracture. Despite advantages test, such smaller specimen simpler testing obtain anisotropic/orthotropic properties, it still requires transducers measure crack opening generate specimen, more complex, labour demanding. study addresses these issues proposing simplified method preparation consisting removing (correlating machine stroke opening) generating groves during casting instead sawing afterwards. These modifications made much easier perform. experimental program assesses setup their influence FRC. Additionally, effective fibre content orientation were assessed performing inductive test. results show can be successfully using configuration presents some comparison 3PBT quality control, especially lower volume control displacement.