Study on the performance of water swelling rubber modified asphalt based on molecular dynamics simulation
Water swelling rubber(WSR)can effectively reduce the permeability of concrete.To achieve the applica-tion of this material in asphalt modification,molecular dynamics simulation method is used to analyze the compatibili-ty between water swelling rubber and asphalt,as well as its influence on the mechanical properties of asphalt.Specif-ically,it includes the construction of molecular models for asphalt,WSR,and WSR modified asphalt blends,com-patibility evaluation,the influence of WSR dosage on asphalt properties,and the modification effect on mechanical properties.The experiment showed that at 160 oC,the difference in solubility parameters between WSR and asphalt was the smallest,and the resulting blend system was more stable;When the dosage is 10％,the binding energy rea-ches its maximum value and a stable blend system can be formed;Compared to matrix asphalt,WSR modified asphalt has increased its elastic modulus by 14％,bulk modulus by 8％,and shear modulus by 18％.The research results have certain guiding significance for the study of asphalt modification based on water swelling rubber.
万方数据
维普
