In this paper, results are reported for a series of discrete fibre pullout tests from high strength geopolymer concrete and high performance, reactive powder, concrete. The results are also compared to that of discrete fibres pulled out from conventional strength…
In this paper, results are reported for a series of discrete fibre pullout tests from high strength geopolymer concrete and high performance, reactive powder, concrete. The results are also compared to that of discrete fibres pulled out from conventional strength mortar. The tests cover both Modes I and II fracture and a number of different fibre angles to the separation plane were studied. The results show that with provi- sion of an end hook the bond is too great and the fibres fracture, even for high strength short fibres. It was found that the mechanical anchorage due to the snubbing effect is especially important and that in the Mode II tests, fibres at negative angles smaller than -30 degrees are largely ineffective over the engineering range of separation, or crack, plane openings.