Use of wood processing industry waste for bitumen modification

Abstract

The paper provides information about the method of obtaining a modifying additive to bitumen, including wood filler. The pore space of the filler contains a basalt reinforcing filler with an average particle size of 150-300 nm. Scots pine bark with an average particle size of 0.5-1 mm was used as a wood filler. The modifying additive was obtained by mixing fine basalt (30 % by weight) and wood bark. After careful mixing for 5 minutes, water was added, the mass of which is twice more than the calculated mass of the reinforced bark. Then the mixture was homogenized. The use of an additive for the preparation of a bituminous binder improves the thermal and physical characteristics of the organic binder (softening temperature and brittleness temperature). In comparison with other traditional stabilizing additives, the use of the proposed composition for the preparation of a bituminous binder also improves the thermal and physical characteristics of the organic binder, such as the brittleness temperature. A decrease in the brittleness temperature of the mixture indicates an increase in the frost resistance of the modified organic binder. For other characteristics, the modifying additive has a comparable effect on the properties of the binder with traditionally used materials.