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The use of new reinforcing materials and products in the construction industry requires their thorough assessment for a variety of design situations. One of the significant effects is the shrinkage of the concrete, which in the case of asymmetrically reinforced elements can cause the element to be deformed. The research was focused on slabs asymmetrically reinforced by composite reinforcement (GFRP) and by three reinforcement stages. To eliminate the effect of concrete non-homogeneity, a concrete slab of the same dimensions was made of the same concrete. The results show a significant effect of shrinkage on reinforced slabs.

This article presents the results of experimental research focused on the shear strengthening of reinforced concrete beams with one of the latest and most promising method: NSM - Near surface mounted reinforcement. In recent years, research in this area focuses on combination of epoxy and FRP (fiber reinforced polymer) materials suitable for strengthening concrete elements. A traditional material: stainless steel was also used in this study but in non-traditional T-cross section in terms of strengthening of concrete members. Structural epoxy adhesives offer excellent properties but are very sensitive to elevated temperatures. Effect of increasing temperature gradually degrade their properties and subsequently decreased bond strength, whereas during cooling may acquire significant parts of the original strength. The influences of these factors were investigated in shear resistance of NSM strengthened concrete beams under four point bending at ambient temperature, at elevated temperature and after cooling to ambient temperature.

In the article selected results of parametric analysis of lightened reinforced concrete panels used in agricultural objects are presented. The aim of the analysis was to devise a parametric model that can be later on used for the simulation of behaviour of real ceiling panels when changing predefined parameters.