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AssigneeResearch Institute of Highway, Ministry of Transportation
InventorsDongwei Cao, Min He, Haiyan Zhang, Xiaowei Wu, Guoqi Tang, Ke Zhong, Yongjun Fan
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The disclosure provides bio-asphalt, bio-asphalt compositions and a method for preparing them. It belongs to the technical field of asphalt material. The method of the disclosure uses bio-oil as the raw material, adopts a combination of extraction process and oxidation process to prepare bio-asphalt, and modifies the product obtained from bio-oil by extraction process or bio-asphalt with ordinary petroleum asphalt and/or aromatic hydrocarbon oil and a macromolecular material to obtain a bio-asphalt composition.
A method for preparing bio-asphalt, characterized in subjecting bio-oil to an extraction process and an oxidation process and thereby obtaining the bio-asphalt, wherein the bio-oil is an oily liquid product prepared from a biomass by pyrolysis, wherein the biomass is selected from the group consisting of wood, straw, bamboo, bark, oak, switchgrass and rice husk, and wherein the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.
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