Bitumen i bitumenska veziva — Određivanje otpornosti na starenje pod uticajem toplote i vazduha — Deo 2: Metoda TFOT

Bitumen and bituminous binders - Determination of the resistance to hardening under influence of heat and air - Part 2: TFOT method

Ovim delom standarda EN 12607 utvrđuje se metoda za merenje kombinovanog efekta toplote i vazduha na tanak film bitumena ili bitumenskog veziva koji se pokreće kako bi se simuliralo starenje koje se dešava tokom mešanja u postrojenju za proizvodnju asfalta. Ova metoda je pogodna i za druga bitumenska veziva, osim putnih bitumena, ali propisana temperatura može da izazove prekomerno starenje koje ne oslikava realne uslove koji postoje tokom mešanja u postrojenjima. Metoda ne predstavlja starenje koje se javlja tokom mešanja toplih mešavina veziva. Pored toga, ovim delom standarda EN 12607 utvrđuje se metoda za određivanje promene u masi oksidovanog bitumena i tvrdog industrijskog bitumena nakon zagrevanja. Metoda se koristi za određivanje isparljivih komponenata, što će u standardima EN 13304 i EN 13305 biti prikazano kao gubitak mase. Ova metoda se drugačije zove TFOT, što znači ispitivanje tankog filma u sušnici (engl: Thin Film Oven Test). UPOZORENjE Ovim evropskim standardom nisu obuhvaćeni svi problemi vezani za bezbednost koji se mogu javiti prilikom njegove upotrebe. Korisnik ovog evropskog standarda ima odgovornost da uspostavi odgovarajuće bezbednosne i zdravstvene zaštitne mere i da odredi primenljivost u skladu sa zakonskim ograničenjima, pre upotrebe. Ukoliko postoji mogućnost prisustva isparljivih komponenata u vezivu, tada ovaj postupak ne treba koristiti. Ne treba ga koristiti za razređene bitumene i bitumenske emulzije pre stabilizacije ovih proizvoda, npr. u skladu sa EN 13074-2.

This part of EN 12607 specifies a method for measuring the combined effects of heat and air on a film of bitumen or bituminous binder, simulating the hardening which most bituminous binders undergo during mixing in an asphalt mixing plant. The method is suitable for other bituminous binders than paving grade bitumen, but the reference temperature might give excessive hardening that does not resemble real conditions during mixing at the plant. The method may not represent the hardening that occurs during mixing of warm mix binders. Additionally, this part of EN 12607 specifies a method for the determination of the change in mass of oxidized bitumens and hard industrial bitumens after heating. The method is used to detect volatile components. The method is referred to as TFOT, i.e. Thin Film Oven Test. WARNING: Use of this European Standard can involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European Standard to identify the hazards and assess the risks involved in performing this test method and to implement sufficient control measures to protect individual operators (and the environment). This includes appropriate safety and health practices and determination of the applicability of regulatory limitations prior to use. If there is a likelihood of volatile components being present in a binder, this procedure should not be used. It should not be used for cut-back bitumen or bituminous emulsions before these products have been stabilized, e.g. in accordance with EN 13074 2.

SRPS EN 12607-2:2015 zamenjuje SRPS EN 12607-2:2012 - 31.08.2015

bitumeni, bitumenski proizvodi, vezivni agensi, naftni proizvodi, starenje, merenje čvrstoće, toplotna ispitivanja, termička otpornost, vazduh, mešanje, tanki filmovi, industrijske peći