Effect of mixing ratio of light and heavy cude oils on road properties and structure of petroleum aphalt
One kind of light crude oil and one kind of heavy crude oil were selected respectively,blended in different ratios,and asphalt was prepared by atmospheric and vacuum distillation process.Research on the impact of crude oil blending ratio on the physical properties and rheological properties of asphalt,Fou-rier spectroscopic tests were performed and functional group indices of crude oil and asphalt were calculat-ed,the study of crude oil refining asphalt in the process of the change of the functional group index,based on the gray relational analysis method to establish the correlation between the functional group index of as-phalt and its road performance.The results show that,with the incorporation of light crude oil,the penetra-tion and ductility of asphalt tend to increase,and the softening point,rotational viscosity,complex modulus and rutting factor tend to decrease;the relative content of aliphatic groups during the refining process de-creases,and the relative content of=C—H on the benzene ring and sulfoxide group increases;the con-tent of aromatic groups mainly determines the penetration and softening point,and aliphatic groups have a greater impact on the ductility,and=C—H on the benzene ring is related to the rotational viscosity,com-plex modulus and rutting factor.
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