Flexural behaviour and ultimate bending capacity of high-volume fly ash reinforced concrete beams

•Flexural performance of HVFAC beams is similar to flexural performance of corresponding OPC beams in terms of ultimate bending capacity.•Available ultimate bending moments code predictions can be applied on HVFAC beams with similar precision and variation of results, like for OPC beams.•The significant difference was noticed regarding cracking extent that was higher in HVFAC beams, compared with the corresponding OPC beams.