26 KB173 KB14 KB200020242000Stroeven, Pietštevilka:1letnik:194 stranistr. 67-70COBISSID:11479513ISSN:1580-3139URN:URN:NBN:SI:doc-S290BKFPenDruštvo za stereologijo in kvantitativno analizo slike, Medicinska fakultetaImage analysis and stereologyanalizacementni materialiComputer simulationGeologyImage processing, computer-assistedParticle sizepoškodbepreiskava materialastereologijaStereological estimates for roughness and tortuosity in cementitious composites|Relatively weak interfaces between aggregate grains and the cementitious matrix initiate the damage evolution process leading to fracture. Coalescence between nearby interface cracks is promoted by the small nearest neighbour distances in a dense random packing of the aggregate. The fracture surface is therefore modelled as a dividing plane from which particles protrude. Assumingspherical aggregate, roughness is obtained us the global geometrical-statistical expression for the increase in fracture surface area due to a multitude of dome-like caps of various sizes. Transport phenomena in concrete are equally influenced by the aggregate, becouse traversing water-born molecules or ions have to go around the dense grains. This route isadditionally promoted by the relatively high porosity in the interfacial transition zone. The planar and linear concepts of tortuosity in the transportpath are analogous to those of roughnessTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo za stereologijo in kvantitativno analizo slike