RESIDUAL LIFE ASSESSMENT OF LOAD-BEARING CAPACITY OF PRECAST FLATCONCRETE SLABS

Abstract

When reconstructing and examining buildings in which the process is accompanied by constant exposure of concrete floor structures to aggressive fluid environments, it is necessary to pay considerable attention to the assessment of residual life of safe operation of building structures. The results of instrumental examinations of precast flat concrete slab exposed to lactic acids showed that the floor structure has many defects and damages: significant corrosion of working reinforcement, distribution bars, concrete, and collapse of support sections of floor slabs. The calculation of the strength of floor components with regard to corrosion of reinforcement and change of support conditions of span slabs suggests that main load-bearing floor structures are in limited operating condition, and in some sections, they are close to unacceptable state. For safe operation of the building, it is necessary to take a set of measures aimed at temporary strengthening of floor structures in the shortest time possible.