EXPERIMENTAL INVESTIGATION ON LIGHTWEIGHT FIBRE REINFORCED CONCRETE WITH HOOKED STEEL FIBRES

摘要

The mechanical response of lightweight concrete, manufactured using pumice stone or expanded clay aggregate and reinforced with hooked steel fibres, is investigated experimentally. Results of standard compressive tests and indirect tensile tests (splitting tests on cylinder specimens and flexure tests on prismatic beams using a three-point loading arrangement) under monotonically increasing or cyclically varying loads are presented. The effects of variation in the fibre volume percentage for the two different types of concrete matrices considered are stressed. The results show that in both cases a suitable content of fibres allows one to obtain performances comparable with those expected from normal weight concrete, the significant advantage of lower structural weight, being maintained.