INFLUENCE OF POROSITY ON FRACTURE CHARACTERICTICS IN MORTAR STRUCTURES.
Abstract eng: The 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.
Contributors:
Publisher:
Columbia University in the City of New York
Conference Title:
Conference Title:
15th ASCE Engineering Mechanics Division Conference
Conference Venue:
New York (US)
Conference Dates:
2002-06-02 / 2002-06-05
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2014-11-19, last modified 2014-11-19
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