Abstract
•The bond behaviour of multi-ply steel reinforced grout composites was investigated.•A minimum splice length of 100-200mm is recommended for SRG systems.•The full strength of low density steel textiles can be developed through short laps.•The performance of high density spliced textiles is limited to less than 40%.•The performance of multi-ply SRG is limited by the mortar/concrete bond strength.
This paper presents an experimental investigation on Steel Reinforced Grout (SRG) systems comprising multiple layers of galvanized UHTSS textiles, with either 4 or 8 cords/in density, embedded within a geopolymer mortar. Lap-splice tests and single-lap bond tests were performed to develop an improved understanding of the textile-to-textile load transfer capacity and of the SRG-to-concrete substrate bond behaviour. The effects of number of textile plies, cord density and compressive strength of concrete on the bond behaviour are analysed.