国产沥青抗裂性能的研究

The Study on Anti-Cracking Performance of Domestic Asphalts

为了探求国产沥青的抗疲劳性能和低温抗裂性能 ,运用 SHRP试验方法中的动态剪切流变仪 ( DSR)、弯曲梁流变仪 ( BBR)分别对三种国产沥青的 RTFOT/PAV残留物的流变特性进行了试验研究 ,结果表明 ,在较宽的温度域范围内 ,经历过 RTFOT/PAV老化的沥青试样的复数剪切模量 G* 、相位角 δ、疲劳开裂因子 G* sinδ、蠕变劲度 S及 m值与试验温度T之间存在着良好的相关性。

In order to search for anti-fatigue performance and low temperature anti-cracking performance of domestic asphalt,SHRP methods including dynamic shear rheometer(DSR) ,bending beam rheometer(BBR) were used to study rheological properties of three domestic asphalts' RTFO/PAV residue. It was shown that correlation was very good between complex shear modulus, phase angle,fatigue cracking factor, creep stiffness, m value and temperature in wider range of temperature.