生物质油温拌沥青结合料路用性能研究OA

To evaluate the road performance of biomass-oil warm-mix asphalt binder,four asphalt binders were select-ed:90#Qinhuangdao base asphalt,70#Jingbo base asphalt,Lunt styrene-butadiene rubber(SBS)modified asphalt,and Lunt rubber asphalt.A series of tests were conducted,including rotational viscosity test,dynam-ic shear rheometer(DSR)test,bending beam rheometer(BBR)test,boiling test,and water immersion test.The results show that the viscosity of the biomass-oil warm-mix 90#and 70#base asphalts does not vary with shear rate,exhibiting Newtonian fluid behavior,whereas the viscosity of SBS-modified asphalt and rubber as-phalt varies with shear rate,exhibiting non-Newtonian fluid behavior.Compared with hot-mix asphalt,the biomass-oil warm-mix asphalt exhibits an increased phase angle,decreased complex shear modulus(G)and rutting factor(G/sinδ),reduced creep stiffness,increased creep rate,and unchanged adhesion grade.Over-all,the biomass-oil warm-mix technology leads to a reduction in high-temperature performance and an im-provement in low-temperature performance of asphalt binders,while the adhesion performance remains essen-tially stable.