Development and research of cement and polymer composites for bridge structure repair

Abstract

The article is dedicated to the construction mix technology development and the study intended for the bridgework damaged structures repair. It presents the results of a study of composites made on the concrete and polymer binders basis. It is shown that the main factors affecting the hydraulic structures' structural elements' durability are both dynamic and mobile loads from the effects of the vehicles, and chemical effects from impurities contained in the water passing through the structure as well as biological effects from bacteria and filamentous fungi. Previously in the article "Bridges maintainability evaluation peculiarities as part of hydraulic structures" were given hydraulic structures inspection results, found various defects and damages: cracks, chips, peeling, etc. In this article, to eliminate such defects were proposed the compositions of varnish-and-paint, mastic mixtures, and resin concrete. For the structure's repair with significant damage, were proposed powder-activated concrete use. In the experimental research process, the cement and polymer concrete compositions with improved strength and other properties recommended for use in power loads conditions, chemical and biological aggressive media, were established. Recommended for use as binders for biocidal cement. presented technological operations for repair work using cement and polymer mixtures. The developed composites' practical use is advisable, including in the structural defects elimination course in hydraulic structures located outdoors in zones with thermal and humidity cycling.