FIELD: road building materials. SUBSTANCE: additive is interaction product of acidic 15-90% and basic 10- 85% components, the former being hardwood pyrolysis pitch or flotation goudron, or fatty acid distillation bottoms, or still residue in synthetic fatty acids' production, and said basic component being still residue in monoethanolamine production or melamine rectification residue. The two components are condensed for 1.0-2 h at 100 to 180 C. Additive may be used in highway and airdrome building. EFFECT: increased heat resistance at no loss in adhesion of mineral part of bituminous concrete to surfaces. 1 tbl
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Authors
Dates
2002-07-20—Published
2000-04-04—Filed