Aging of bituminous concrete mixes, bituminous concretes and the ways of their thermo-oxidative firmness increase
V. I. Bratchun, M. K. Pakter, A. A. Stukalov, V. L. Bespalov, D. V. Gulyak, Ye. A. Romasyuk
Donbas National Academy of Civil Engineering and Architecture
Annotation: This work is devoted to the theoretical and experimental establishment of conformities to law of Physical-chemical processes of thermo-oxidative aging of petroleum road bitumen, bituminous concrete mixes, bituminous concretes in the process of manufacturing, thermostatting in thermos-bunkers, transporting to the site of placement into the layers of non-rigid road surfacing, under maintenance conditions, and in the process of developing ways of decreasing intensity of thermo-oxidative aging of bituminous mixes and bituminous concretes. By means of mass changing, penetration, the temperature of softening, group of chemical compositions it has been set that thermo-oxidation is the dominative external factor of the thin-film bitumen aging. It leads to the accumulation of pyrobitumen, to the formation of a rigid spatial coagulative net and its destruction due to setting tension and mechanical action of transport loadings. The less is the layer bitumen thickness, the quicker is the thermal oxidation on the surface of mineral materials. The activation energy of thermal oxidation processes decreases.
Keywords: petroleum road bitumen, bituminous concrete mixes and bituminous concrete, technological and maintenance aging, thermo-oxidative aging, ways of deceleration of thermo-oxidative aging of bituminous concrete mixes and bituminous concrete.
Pages: 105-117.
Link for citation: Bratchun, V. I.; Pakter, M. K.; Stukalov, A. A. [et al.]. Aging of bituminous concrete mixes, bituminous concretes and the ways of their thermo-oxidative firmness increase. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2015. – Vol. 11, N 3. – Р. 105-117. – URL: https://donnasa.ru/publish_house/journals/spgs/2015-3/01_bratchun_pakter_stukalov_bespalov_gulyak_romasyuk.pdf (date of access: 19.09.2024). (in Russian)
Vol. 11, N 3 (2015)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture