DAMAGE MECHANISMS IN FIBRE REINFORCED CONCRETE COMPOSITES

摘要

Concrete's are composites containing an aggregate and a binder as major components. The latter can be either cementitous or not. The aggregate in the material body constitutes a dense random packing of a wide range of particle sizes, thereby providing the load-bearing skeleton. Bond between these phases is - particularly for river aggregate - relatively weak, so that damage evolution is intimately connected with the geometrical statistical features of the aggregate packing. When bond cracks coalesce, they are confronted eventually with fibres, which strongly influence the further opening up of such cracks. The main characteristics of the damage evolution process under direct compressive or tensile loadings is described for plain and fibre reinforced cementitious composites.