The introspection of methods for determination the actual compressive strength in an existing fiber-reinforced concrete structures.

In order to become the scientific conference report this article presents in details the experiment results and numerical values received in it. These results can be useful to engineers in the field of employ fiber-reinforced concrete. The research was devoted to the features of determination the compressive strength of fiber-reinforced concrete in existing structures. The methods described in standards and technical documentation, dedicated to the design, manufacture and application of fiber-reinforced concrete structures, were analyzed in case of regarding to the quality control of erected constructions. The results of fiber-reinforced concrete strength studies, carried out within the inspection work on the ground floor slab belonging to a mall under construction, are presented. The application of destructive testing of concrete cylinder samples and two ways of non-destructive testing (NDT) is considered: the anchor pull-out test and the ultrasonic pulse velocity (UPV) test. There is a comparison and analysis of the results obtained using the destructive and non-destructive methods. [ABSTRACT FROM AUTHOR]