FIBER-REINFORCED PUMICE AGGREGATE SELF-COMPACTING CONCRETE

This study aims to present experimental findings relevant to the development of structural fiber reinforced pumice aggregate self-compacting concrete (PASCC) falling in the LC25/28 strength class and D1.8 density class (as per EN 206-1). The addition of fibers in lightweight aggregate concrete mixtures provides a countermeasure to the brittleness associated to this family of concretes. The mix design methodology of the PASCC is based on the packing density theory. The work focuses on the effect of the type of fibers (polypropylene or steel, of different aspect ratios) in both the fresh and the hardened state properties of the material, with the fiber content kept constant. Based on the results of this study it is verified that properly designed fiber-reinforced PASCC mixtures may be evaluated while in fresh state using the same test methods applicable for normal weight SCC (NWSCC) and yield scores within the commonly accepted ranges.