| Abstract | Nerazorna ispitivanja neizostavan su dio ispitivanja gotovih proizvoda ili konstrukcija kao i održavanja strojeva i konstrukcija od najmanjih do vrlo velikih dimenzija. Ovim metodama nastoje se ustanoviti uglavnom okom nevidljive karakteristike materijala, predmeta te strojeva i uređaja koje se svode na pore, šupljine, delaminacije, segregacije, uključine i sl. koje se nalaze na površini, odnosno ispod nje.
Polimerni beton je beton koji uz ili umjesto cementa kao veziva sadrži prikladnu polimernu smolu. Isprva se razvio za građevinsku primjenu u svrhu izrade vodonepropusnog sloja na već postojećem cementnom betonu, industrijskih podova kao i reparaciju cementnog betona. Radi njegovog iznimnog svojstva upijanja vibracija, manje gustoće uz veću krutost te jednostavnosti pripreme i ulijevanja u kalup implementiran je i u strojarsku primjenu djelomično zamjenjujući sivi lijev kod izrade nosivih dijelova skupljih i preciznijih alatnih strojeva. Glavne zadaće u izradi polimernog betona su jednoličan raspored konstituenata (agregata – pijeska i šljunka, i polimerne smole), pravilan odabir udjela pojedinih konstituenata te čim manja poroznost, što će u ovom završnom radu biti i razmatrano. |
| Abstract (english) | Non-destructive testing is an indispensable part of testing finished products or constructions, as well as maintaining machines and structures ranging from the smallest to very large dimensions. These methods aim to detect characteristics of materials, objects, machines, and devices that are mostly invisible to the naked eye. These include pores, cavities, delaminations, segregations, inclusions, etc., located on or beneath the surface.
Polymer concrete (PC) is a type of concrete that, in addition to or instead of cement as a binder, contains suitable polymer resin. It was initially developed for construction applications, such as creating waterproof layers on existing cement concrete, industrial floors, and repairing cement concrete. Due to its exceptional properties, such as vibration absorption, lower density combined with higher rigidity, and ease of preparation and molding, polymer concrete has been implemented in mechanical engineering applications, partially replacing gray cast iron in the production of structural components for more expensive and precise machine tools. The main tasks in the production of polymer concrete are achieving a uniform distribution of constituents (aggregate – sand and gravel, and polymer resin), proper selection of the proportion of individual components, and minimizing porosity, which will be the focus of this final paper. |
