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借助动态剪切流变仪(DSR)、低温弯曲流变仪(BBR)和Brookfild旋转黏度仪,对不同掺量的天然岩沥青改性沥青的性能进行了试验研究,分析了岩沥青改性剂对基质沥青流变性能的影响。结果表明:加入岩沥青后沥青胶结料的PG高温等级和黏度提高,抗车辙因子增大,相位角减小,大大提高了沥青的高温稳定性和降低了温度敏感性,且随着掺量的增加变化幅度增大;低温条件下蠕变劲度模量增大,低温性能有所下降,但当岩沥青掺量为2%~8%时,不会对沥青胶结料的低温性能产生大的不利影响。
With the help of dynamic shear rheometer (DSR), low temperature bending rheometer (BBR) and Brookfild rotary viscometer, the properties of natural rock asphalt modified asphalt with different dosages were studied. The effects of rock asphalt modifier Effect of matrix asphalt rheological properties. The results show that the PG grade and viscosity of asphalt binder increases with the addition of rock asphalt, the rutting factor increases and the phase angle decreases, which greatly improves the high temperature stability of asphalt and decreases the temperature sensitivity. With the increase of content The creep modulus at low temperature increases and the low temperature performance decreases. However, when the content of rock asphalt is 2% -8%, the creep stiffness modulus will not increase greatly in the low temperature performance of asphalt cement Negative Effects.