Research of strength and condition of cement-concrete pavement on bridges by non-destructive methods

The article presents the results of determining strength non-destructive methods cement concrete pavement on bridges. According to research, a differential curve, reliability curve and inverse value accumulated frequency compressive are constructed. It is established that investigated objects corresponds class according normative documents. However, visual, instrumental thermal imaging inspection areas bridges revealed number defects in cement-concrete slabs, which can lead loss structure strength. In particular, it was found destruction inspected reinforced slabs mainly occurs under influence corrosion working part volume steel reinforcement, unsatisfactory condition compensation seams supports. determined cracks occur due low resistance bending loads, reinforcement exposed aggressive environments. turn, proved structural occurred excessive loading, led overstrain structure, non-structural - internal stresses caused by loads various linear expansions materials. Thermal study significant difference temperature elements, future leads pavement. peeling protective layer metal studied phenomenon electro-chemical corrosion.
 experience analysis allows prepare proposals for construction overpasses using modern materials, non-metallic reinforcement.