Rheological Properties of Direct Coal Liquefaction Residue Composite Modified Asphalt Mortar
JI Jie
ZHANG Ziyuan
DONG Yuanshuai
WEN Long
MA Tong
Abstract：In order to investigate the rheological properties of direct coal liquefaction residue(DCLR)composite modified asphalt mortar,four filler-bitumen ratios were designed for three types of asphalt mortars(DCLR composite modified asphalt mortar,DCLR modified asphalt mortar and SK-90 asphalt mortar).Dynamic shear rheology(DSR)test,bending beam rheology(BBR)test,differential scanning calorimetry(DSC)test,and scanning electron microscopy(SEM)test were used to investigate the rheological properties of the mortars.The results show that DCLR composite modified asphalt mortar has better heat resistance,stronger thermal stability,and the high temperature resistance to flow deformation is significantly stronger than SK-90 asphalt mortar.The temperature sensitivity of DCLR composite modified asphalt mortar is significantly reduced and its low temperature rheology is significantly better than that of the DCLR modified asphalt mortar.Compared to SK-90 asphalt mortar and DCLR modified asphalt mortar,DCLR composite modified asphalt mortar has the best overall high and low temperature performance.
Keywords：road engineeringdirect coal liquefaction residue(DCLR)filler-bitumen ratioasphalt mortarrheological propertymicroscopic mechanism
Publication Date：2024-09-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 853-860 )