000004685 001__ 4685
000004685 005__ 20141119144544.0
000004685 04107 $$aeng
000004685 046__ $$k2002-06-02
000004685 100__ $$aHaidar, Khalil
000004685 24500 $$aINFLUENCE OF POROSITY ON FRACTURE CHARACTERICTICS IN MORTAR STRUCTURES.

000004685 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004685 260__ $$bColumbia University in the City of New York
000004685 506__ $$arestricted
000004685 520__ $$2eng$$aThe purpose of this paper is to quantify the influence of microstructural degradations, namely a variation of porosity, on the mechanical properties of heterogeneous quasi-brittle materials (mortar, concrete). The study deals with this problem on a model mortar material (mortar + polystyrene beads). Experimental investigations on this material in compression, bending, emission acoustic measurements and their analysis are detailed. The experiments show that the elastic modulus, the compressive strength and the tensile strength decrease with the mass density. The brittleness of the structures as well as the fracture energy (obtained by applying Bazant’s size effect law) are decreased too. Comparison with leached mortar beams obtained by Le Bellégo et al. (2001) are also presented.

000004685 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004685 653__ $$amortar, degradation, porosity, fracture characteristics, size effect.

000004685 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004685 720__ $$aHaidar, Khalil$$iPijaudier-Cabot, Gilles
000004685 8560_ $$ffischerc@itam.cas.cz
000004685 8564_ $$s125108$$uhttps://invenio.itam.cas.cz/record/4685/files/173.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004685 962__ $$r4594
000004685 980__ $$aPAPER