The WST-method for fracture testing of fibre-reinforced concrete

Artikel i vetenskaplig tidskrift, 2005

To evaluate the reproducibility of the wedge-splitting test method (WST-method) and to provide guidelines, a round robin study was conducted - financed by NORDTEST - in which three labs participated; see Löfgren et al. [1]. The test results from each lab were analysed and a study of the variation was performed. From the study of the intra-lab variations, it is evident that the variations of the steel fibre-reinforced concrete properties are significant. The investigation of the inter-lab variation, based on an analysis of variance (ANOVA), indicated no inter-lab variation. Furthermore, the tensile fracture properties were interpreted from the test results as a bi-linear stress-crack opening relationship using inverse analysis.