Abstract
In order to improve the flame retardant property of asphalt, ATH (aluminum hydroxide)/EG (expandable graphite) composite flame retardant was obtained by hydrothermal method. The flame retardancy of asphalt was analyzed by oxygen index test. The rheological properties of asphalt were analyzed by dynamic shear rheological test and bending beam rheological test. The research results show that the optimal mix ratio of the compound flame retardant with the best flame retardant synergistic effect is ATH:EG = 1:1. Considering the flame retardancy and rheological properties, the content of ATH/EG composite flame retardant is recommended to be 15%~20%.
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