Study of the Colloid-Dispersed Structure of Road Bitumen under Thermal-Oxidative Aging
Journal Title: Современное промышленное и гражданское строительство - Year 2018, Vol 14, Issue 3
Abstract
The DSC method was used to study the changes of the colloid-dispersed structure of oil road bitumen BND 40/60 with its thermo-oxidative aging in a layer of thickness 2 mm. In the DSC study, two consecutive heating of the sample was used in order to identify irreversible changes. The same method studied the aging of oils, resins and asphaltenes, separated from the original and aged bitumen. In DSC research, bitumen aging is manifested by an increase in the endoeffect associated with the disordering of coagulation structures, an increase in the temperature of desolvation of asphaltenes and a rise in the heat capacity of the group chemical components of the organic binder. These changes lead to hardening of cohesive bonds and loss of road binding of binder properties.
Authors and Affiliations
Mixail Pakter, Valeriy Bratchun, Olga Narygnaya, Aleksandr Stukalov, Vitaliy Bespalov
Keywords
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