Evaluation of Methodologies for Assessing Self-Healing Performance of Concrete with Mineral Expansive Agents: An Interlaboratory Study

Self-healing concrete has the potential to optimise traditional design approaches; however, commercial uptake requires ability harmonize against standardized frameworks. Within EU SARCOS COST Action, different interlaboratory tests were executed on self-healing techniques. This paper reports evaluation of effectiveness proposed experimental methodologies suited for with expansive mineral additions. Concrete prisms and discs MgO-based healing agents produced precracked. Water absorption water flow over a period spanning 6 months assess sealing efficiency, crack width reduction time was monitored. High variability reported both reference (REF) healing-addition (ADD) series affecting reproducibility cracking. However, within each lab, creation repeatable. ADD larger widths. The latter influenced observed making direct comparisons across labs prone errors. highlighted susceptible application Concurrently, as facile method assessment performance shown all labs. Overall, importance repeatability testing methods is in providing sound basis incorporation concepts practical applications.