Volodymyr Gunka, Myroslava Donchenko, Yuriy Demchuk, Iryna Drapak, Michael Bratychak
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Production of Bitumen Modified with Low-Molecular Organic Compounds from Petroleum Residues. 8. Prospects of Using Formaldehyde Modified Tars in Road Construction
Modification of tars with formalin (37 % aqueous solution of formaldehyde) was carried out using various acids as process catalysts with the aim of obtaining new binding materials for road construction. H2SO4, HCl, H3PO4, and СH3COOH were used as catalysts. The modification process was carried out in the temperature range of 378-403 K and for a duration of 0.6-1.0 h. The rheological properties of tars modified with formaldehyde at 333, 343, and 353 K were studied and a comparison of the rheological properties of the obtained bituminous binder materials with oxidized bitumens was carried out.
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