Abstract The robustness of self-compacting concrete (SCC) mixtures is usually sensitive to alterations in the mixture constituents, which is also the case when using high volumes of calcareous fly ash as binder. In the present report, calcareous fly ash was used as 30% and 50% by mass of the total binder without changing the water to binder ratio. The expected loss of workability due to the increased water demand of calcareous fly ash was compensated by adjusting the dosages of the admixtures (superplasticizer and viscosity modifying agent). Slump flow, L-Box and segregation resistance tests were carried out on the fresh mixtures, showing that robust SCC can be produced with the addition of high volumes of calcareous fly ash. Mechanical characteristics of the test mixtures were also measured, showing adequate strength development, comparable to that of the reference concrete, while shrinkage deformations were reduced when higher volumes of calcareous fly ash were used.
