DBPapers
DOI: 10.5593/SGEM2014/B42/S18.032

THE IMPACT OF FLY ASHES ON THE CHARACTERISTICS OF 50/70 BITUMEN

P. Marc, F. Belc, O. Roman
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 2, 243-250 pp

ABSTRACT
The paper presents a laboratory experimental research performed on 50/70 bitumen
coming from OMV Austria. The research aims at pointing out the characteristics of the bitumen after having been used in the composition of two B.A.16 and B.A.D.25 type asphalt mixtures, with filler and fly ash as void filling material. The fly ash is supplied by the Timisoara Sud heating plant. Practically, this research was realized following several discussions with different specialists in the field of road construction. The discussions were based on the higher physic-mechanical characteristics obtained through ordinary and dynamic testing performed on the mentioned mixtures. The realized asphalt mixtures were analyzed separately based on the percentage of filler initially established and based on its replacement with 7% fly ash. After presenting the results of these analyses within different scientific communications, the proposal was made to follow the characteristics of the 50/70 bitumen during a period of 2…3 years after manufacturing the samples, in order to emphasize the effect of the chemical reactions which could take place, or not, between the components of the bitumen and those of the fly ash. The paper presents the results obtained following the determination of the usual characteristics of the bitumen extracted from the analyzed asphalt mixtures, compared to the haracteristics of the bitumen before using it in the mixture.

Keywords: 50/70 bitumen, fly ash, impact ash-bitumen

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