氧化石墨烯对沥青混合料力学特性的影响研究

Study on the Effect of Graphene Oxide on the Mechanical Properties of Asphalt Mixes

为探究氧化石墨烯(GO)对热拌沥青混合料(HMA)力学特性的影响,本文将不同质量的GO加入沥青胶结料,得到不同GO掺量(0.5%、1%、1.5%、2%和2.5%)的改性沥青胶结料,测试并比较不同GO掺量的改性沥青胶结料性能,然后对基质沥青混合料和不同GO掺量(1%、1.5%和2%)的改性沥青混合料进行室内试验。研究结果表明:GO显著提升了沥青混合料的抗压回弹模量;随着GO掺量的增加,沥青混合料的永久变形明显减小;GO的加入提高了沥青混合料的浸水残留稳定度和冻融劈裂强度比,有利于沥青混合料的水稳定性;掺入GO能优化沥青混合料的抗裂性能,且抗裂性能随着GO掺量的增加而逐渐提升。

To investigate the effect of graphene oxide(GO)on the mechanical properties of hot-mix asphalt mixture(HMA),different masses of GO were added to asphalt binders to obtain modified asphalt binders with different GO doses(0.5%,1%,1.5%,2%and 2.5%).The performance of modified asphalt binders with different GO doses was tested and compared,and then indoor tests were conducted on matrix asphalt mixes and modified asphalt mixes with different GO doses(1%,1.5%and 2%).The results showed that GO significantly improved the compressive rebound modulus of asphalt mixture;the permanent deformation of asphalt mixture decreased significantly with the increase of GO dosing;the addition of GO improved the residual stability of asphalt mixture and freeze-thaw splitting strength ratio,which is beneficial to the water stability of asphalt mixture;the incorporation of GO can optimize the cracking resistance of asphalt mixture,and the cracking resistance gradually improved with the increase of GO dosing.