Abstract
The chemical modification of oxidized bitumen BND 70/100 by formaldehyde, or rather its aqueous solution, formalin, was carried out for use in hot asphalt pavement technologies. The chemical modification conditions of bituminous binder by formaldehyde are given. There is shown considerably increases of the heat capacity (softening point) and adhesion properties (adhesion to glass) in the chemical modification process of oxidized bitumen by formaldehyde. The adhesion determining methods of binder with granite crushed stone and glass plates as variants of adhesive ability estimation of bitumen are given. It has been established that the modification by formalin in the amount of 10% by weight dramatically reduces the bitumen viscosity, so it showed necessary to carefully monitor the source bitumen and formalin ratio content during the modification. A hot dense fine-grained asphalt mix was selected. The influence of modified bitumen on physical and mechanical properties of asphalt concrete, such as water saturation, border compressive strength at 20 and 50 °C and the long-term water resistance coefficient after 15 days.
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Gunka, V., Sidun, I., Solodkyy, S., Vytrykush, N. (2020). Hot Asphalt Concrete with Application of Formaldehyde Modified Bitumen. In: Blikharskyy, Z., Koszelnik, P., Mesaros, P. (eds) Proceedings of CEE 2019. CEE 2019. Lecture Notes in Civil Engineering , vol 47. Springer, Cham. https://doi.org/10.1007/978-3-030-27011-7_14
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DOI: https://doi.org/10.1007/978-3-030-27011-7_14
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