The paper presents the results of the experimental determinations of the resistance of the massive masonry elements from a patrimony building in the Oltenia Region, the masonry under the action of the environmental factors and the strong seismic movements occurring during their lifetime. Starting from the models of massive masonry behavior specific to the analyzed building type, the short compressive strength of the masonry elements from the analyzed building was determined experimentally. All the researches undertaken bring valuable data needed to predict the collapse of massive masonry buildings in national and world heritage.
Oxide ion conductors are an important group of materials which have been increasingly studied due to their applications in many devices of high technological interest, especially in Solid Oxide Fuel Cells (SOFC) which are efficient and environmentally friendly energy convertors.In this work we study an inexpensive, suitable and recyclable material with apatite structure. Lanthanum silicate with apatite type structure, La 10 Si 6 O 27 ,was synthesized by two pathways: sol-gel and co-precipitation. The as-obtained powders were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy. Samples with different morphologies consisting of a mixture of phases were obtained.
In the paper presented are given oscillation amplitude threshold compaction and vibrating platform, stiffness and viscosity of the concrete, and the frequency and amplitude of movement on compacting concrete.
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