Současné kotevně impregnační a pečetící nátěry mostovky

Abstract

Abstract This thesis focuses on the most frequent polymeric materials on the basis of epoxy and polyurethane used to create anchor impregnation and seal coating of a bridge deck, both during construction and reconstruction. Materials used for testing can be typically found on construction sites in the Czech Republic. It targets the requirements coming not only from the technical regulations for these primary layers of waterproofing formation of a bridge deck, but also from a base layer. The results of the practical part show, that while testing the final characteristics of polymeric materials, these were significantly influenced by temperature. Extreme short-term load on the surface of the hardened coating had no significant influence on the final measured values, as opposite to the significant effect of applied low temperatures. The thesis consists of theoretical and practical part. Theoretical research provides a short insight into polymeric materials used for anchor impregnation and seal coating of a bridge deck including all available information about the requirements for their characteristics, mentioned in technical conditions defined by the Road and Motorway Directorate of the Czech Republic and technical sheets of material manufacturers. Theory also includes the requirements for a base, its preparation and testing, before applying first layers. In the last part, this thesis brings a topic of using asphalt strips while considering standard requirements, material characteristics and ways of applying. Practical part analyses how a base effects tightness and design of polymeric coating used as anchor impregnation and seal coating of a bridge deck. Practical exams focus on the speed of hardening and reliability of two used polymeric coatings, polyurethane and epoxy, applied on a concrete base under boundary conditions. During testing, it aims at trying to stick to the system solution of a base and polymeric coating, e.g. materials from the same manufacturer were used to test a body. For some polymeric coatings, a base was combined, taking into account it does not have system solution for a base. Practical testing followed valid regulations. The characteristics of materials used were validated by practical tests: base humidity, tear test, compressive and tensile strength, coating adhesion to a base, spark test, drying to a state without a print, or other practical tests resulting from common practice and the theoretical research of the thesis.