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为了确定PR-Module改性沥青混合料的力学性能和制备工艺参数,以SK-70#为基质沥青,选用PR-Module外掺剂制备改性沥青混合料,通过马歇尔试验、劈裂试验、静态抗压回弹模量试验和动态模量试验,研究PR-Module改性沥青混合料的制备工艺参数和力学性能。研究结果表明:掺入PR-Module改性剂后,PR-Module改性沥青混合料的制备工艺参数比未掺PR-Module的普通沥青混合料有较大变化;随着PR-Module掺量的增大,沥青混合料的劈裂强度先增大后减小;PR-Module外掺剂能明显提高沥青混合料的疲劳寿命和静态抗压回弹模量;在相同试验条件下,PR-Module改性沥青混合料比未掺PR-Module的普通沥青混合料的动态模量大、相位角小;依据Sigmoidal函数方程,建立了参考温度为20℃时PR-Module改性沥青混合料的动态模量主曲线,并与静态抗压回弹模量进行了对比分析,得出在相同温度下,静态抗压回弹模量与动态模量相对应的加载频率较小,大约为0.03~0.07Hz。
In order to determine the mechanical properties and preparation process parameters of PR-Module modified asphalt mixture, the modified asphalt mixture was prepared with SK-70 # as the base asphalt and PR-Module external additive. Through Marshall test, splitting test, static state Compressive resilience modulus test and dynamic modulus test to study the preparation process parameters and mechanical properties of PR-Module modified asphalt mixture. The results show that the preparation process parameters of PR-Module modified asphalt mixture have more changes than that of ordinary asphalt mixture without PR-Module when PR-Module modifier is incorporated. With the increase of PR-Module content The splitting strength of asphalt mixture first increases and then decreases; PR-Module external admixture can obviously improve the fatigue life and static compressive resilience modulus of asphalt mixture; Under the same experimental conditions, PR-Module The dynamic modulus and the phase angle of modified asphalt mixture are lower than those of ordinary asphalt mixture without PR-Module. Based on Sigmoidal function equation, the dynamic model of PR-Module modified asphalt mixture with reference temperature of 20 ℃ Volume main curve and compared with the static compressive resilience modulus. It is concluded that the static compressive resilience modulus and the dynamic modulus corresponding to the same temperature, the loading frequency is small, about 0.03 ~ 0.07Hz .