Development of resource-saving composite materials based on aqueous dispersions of petroleum bitumen and epoxy-diane oligomer
N. V. YAKOVETS, N. P. KRUT’KO, O. V. LUKSHA
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus, Minsk, Republic of Belarus
Keywords: composite materials, aqueous dispersions, bitumen, epoxy-diane oligomer, physicochemical properties
Abstract
Formulations of composite materials based on aqueous dispersions of petroleum bitumen and plasticised epoxy-diane oligomer, stabilised by oleic acid in an alkaline medium, have been developed. The morphology of composite binder samples, their structural and rheological properties, temperature properties (softening point and brittleness temperature), and adhesive interaction with mineral materials of acidic and basic nature have been studied using granite and dolomite as examples. It is shown that the studied systems have a homogeneous structure, since there is a uniform oligomer distribution throughout the volume of the bitumen binder, with inclusions of light aggregates of epoxy-diane oligomer in the bitumen matrix, the size of which increases with an increase in the amount of the additive. It has been established that in the presence of epoxy oligomer, the temperature range of bitumen plasticity expands to ~20 °C, and the colloidal structure of mixed dispersions exhibits a non-Newtonian flow pattern up to 70 °C, so that with an increase in oligomer concentration (1-20 wt%), the resistance of the colloid system to deformation increases, which is confirmed by an increase in the values of rheological characteristics. The maximum adhesive bond of films (>75 %) is recorded during the interaction of the oligomer-bitumen binder and mineral material with a basic surface nature at an oligomer content of 5 and 15 %. The obtained compositions are promising for use as a film-forming material for construction purposes, which can be used as a sealing and waterproofing protective coating for road and civil construction products and structures, and also as part of a plugging material for cementing, fastening and repairing wells in oil and gas production industry.
|
