TY - JOUR N2 - Hard bitumens are used in the construction industry primarily in it’s unmodified form, for instance for the production of the so-called traditional roofing felt. Due to the low price of these types of membranes, the use of a popular but expensive modifying agent, SBS copolymer, is not justified economically. Research carried out by the authors has shown that chemical organic compounds belonging to a group of imidazolines may potentially be used as much cheaper bitumen modifier. It was demonstrated that a new type of modifier based on oleic imidazoline, developed by the authors, has a significant impact on improving the physical properties of bitumen. The use of this modifier results in a significant increase in the bitumen plasticity range, both before and after laboratory ageing .In addition, there was a considerable increase of bitumen’s resistance to aging. Its use can help improve the quality and durability of popular waterproofing products manufactured with the use of hard bitumen. L1 - http://www.journals.pan.pl/Content/84002/mainfile.pdf L2 - http://www.journals.pan.pl/Content/84002 PY - 2015 IS - No 1 EP - 130 KW - hard bitumen KW - bitumen ageing test KW - oleic imidazoline A1 - Zieliński, K. A1 - Babiak, M. PB - WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES DA - 31.03.2015 T1 - Studies of possible use of oleic imidazoline as modifying agent for hard bitumen SP - 119 UR - http://www.journals.pan.pl/dlibra/publication/edition/84002 T2 - Archives of Civil Engineering ER -