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Abstract
purpose of this article is to evaluate thermosetting resin-based fills for compensation of white marble and similar stones in the outdoor environment. The article describes seven commercially available fillers, tested in two thermosetting resin formulations for structural fill on dense, whitish, translucent marble and similar calcerous stones.
The influence of the concentration, color, refractive index, density, particle size and shape, and microstructure of each filler on the color, translucency, texture, density, elasticity, plasticity, reversibility, water sensitivity, and working properties of their composites will be described. A total of 187 samples were tested for density, water absorption, color, and stress-strain at break. Results of the tests show that fillers, when used in high concentration, will significantly influence the visual and mechanical properties of composites. The properties of glass microballoons (Microspheres and Eccospheres), marble dust, and Globe-o-sil fillers were found to be preferable to those of calcium carbonate, mica, and Cab-o-sil fillers. The most promising results were obtained using the hollow, glass sphere fillers (Microspheres, Eccospheres) in a Sikadur epoxy resin-to-filler wlv concentration range of 1-30%.