The Use of Polymer Composite Rebar for Supports of the Contact-Line with Anchorage on Foundations
The technology for pre-stressing and anchoring of composite rebar which makes it possible to reinforce concrete products and produce the contact-line supports of high quality, which possess advantages in comparison with the reinforced concrete, has been developed. The prototypes of the posts of supports with the use of composite basalt-plastic reinforcement, which were tested for strength, rigidity and crack resistance in NIIZHB named after A. A. Gvozdev, have been prepared. In the course of testing, the value of deflection of the post in the plane of application of the control load was determined. Posts with composite reinforcement (with vibro-loading and after vibro-loading) and metallic posts were tested. Results of the study show that the vibro-loading had no significant impact on the properties of supports, reinforced with composite rebar. The results obtained confirm the possibility to use concrete posts of contact-line supports, reinforced with pre-stressed composite rebar. In the future, it is necessary to develop the working drawings for the replacement of steel reinforcement by composite polymer rebar and the technical conditions for supports of the contact-lines of Russian Railways as well as the technical regulations for their manufacturing.