Avtor/Urednik		Stroeven, Piet
Naslov		Stereological estimates for roughness and tortuosity in cementitious composites
Tip		članek
Vir		Image Anal Stereol
Vol. in št.		Letnik 19, št. 1
Leto izdaje		2000
Obseg		str. 67-70
Jezik		eng
Abstrakt		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. Assuming spherical 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 is additionally promoted by the relatively high porosity in the interfacial transition zone. The planar and linear concepts of tortuosity in the transport path are analogous to those of roughness.
Deskriptorji		GEOLOGY COMPUTER SIMULATION PARTICLE SIZE IMAGE PROCESSING, COMPUTER-ASSISTED