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RESEARCHING THE EFFECTS OF DIFFERENT AGGREGATES AND BITUMEN TYPES ON ASPHALT MIXTURES

Nicolae Ciont, Mihai Iliescu, Krzysztof Blazejowski, Marta Wojcik-Wisniewska

First published: 2017-06-20https://doi.org/10.5593/sgem2017/11/s01.062View metrics

Abstract

The main purpose of this research is to analyse the influence of different natural aggregate sources, as well as different bitumen types, on the adhesion and affinity between the two materials and on the properties of stone mastic asphalt (SMA). The aggregates used in this study were both fine (sand 0/4) and coarse (4/8 and 8/16), extracted from four different natural rock quarries in Romania, selected after a geographical, geological and geomorphological analysis. From a petrographic point of view, the rocks extracted in the proposed quarries are igneous. Adhesion and affinity tests on bitumen coated aggregates were performed, while also employing an anti-stripping agent in the process. Regular paving grade bitumen 50/70, as well as polymer modified bitumen (PMB) 45/80-65, were used. All tests have shown that using an anti-stripping agent improves both bitumen adhesion to natural aggregates and the affinity between the two. Afterwards, laboratory tests on SMA samples, prepared using the same types of bitumen, aggregates and additive, were performed. Although the results were variable and no general conclusion could be drawn, they were clearly influenced by the shape and nature of the mineral aggregates, as well as by the bitumen types and grades.

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Publication details

Title
RESEARCHING THE EFFECTS OF DIFFERENT AGGREGATES AND BITUMEN TYPES ON ASPHALT MIXTURES
Authors
Nicolae Ciont, Mihai Iliescu, Krzysztof Blazejowski, Marta Wojcik-Wisniewska
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining
Publisher
STEF92 Technology
Year
2017
Pages
487-494
SWS Citekey
Ciont20171487494
ISSN
1314-2704
ISBN
978-619-7105-98-8
Language
en
Publication type
Conference Paper
Keywords
natural aggregatesbitumenadhesionasphalt mixturesadditives.
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