Development of an improved cracking method to reduce the variability in testing the healing efficiency of self-healing mortar containing encapsulated polymersTim Van Mullem, Kim Van Tittelboom, Elke Gruyaert, Robby Caspeele and Nele De BelieMATEC Web Conf., 199 (2018) 02017DOI: https://doi.org/10.1051/matecconf/201819902017