Abstract Self-compacting or self-flowing fibre reinforced mortar (FRM) is required for strengthening of structural concrete utilizing cementitious composites. In this study, high- strength FRM with self-flowing properties is developed using high volume (50% by weight of cement) blended pozzolans and low-cost nylon fibre. A mixture of fly ash, slag and silica fume was used as blended pozzolan. Nylon fibre derived from conventional nylon rope was utilized as fibre in preparing FRM. Experimental results showed promising results in terms of strength. FRM with 2% nylon fibre was achieved maximum strength, which is as high as 91.32 MPa in 28 days. However, inclusion of fibre causes a decrease of workability in the fresh state. Incorporation of nylon fibre also helped to bridge the crack and thus increase the tensile properties of mortar. Significant improvement was observed in the failure pattern of the specimens while incorporated with nylon fibres. Therefore, this type of FRM can be utilised for concrete repair.