摘要
【目的】解决大量RAP资源化利用问题,提升RAP水泥稳定碎石基层材料的路用性能。【方法】对掺加不同老化程度的RAP水泥稳定碎石基层材料进行力学性能和耐久性能试验分析。【结果】研究表明,随着RAP老化程度的降低,抵抗外界变形能力减弱,在一定程度上削弱了RAP的高温性能;老化程度相同的RAP水泥稳定碎石的无侧限抗压强度和抗压回弹模量均随养护时间的延长而增加;相同时间下,随着RAP老化程度的降低和测试温度的提升,无侧限抗压强度和抗压回弹模量呈下降趋势;随着RAP老化程度的降低,其抗冻性能、低温抗裂性能和水稳定性能显著增强。【结论】不同老化程度的RAP水泥稳定碎石基层材料的力学性能、高低温稳定性、抗冻性能、水稳定性能均存在显著差异,应根据材料性能指标合理选用不同老化程度的RAP。
[Purposes]This paper aims to solve the problem of RAP resource utilization,and further improve the pavement performance of RAP cement stabilized macadam base material.[Methods]The mechanical properties and durability of cement stabilized macadam base material mixed with different degrees of aging RAP were analyzed.[Findings]The results show that,with the decrease of RAP aging degree,the resistance to external deformation and high temperature performance were weakened,which weakens the high temperature performance of RAP to a certain extent.With the extension of curing time,the unconfined compressive strength and compressive resilience modulus of RAP cement-stabilized macadam with the same aging degree were increased.Under the same curing time,with the decrease of RAP aging degree and the increase of test temperature,the decreasing trends were showed by the unconfined compressive strength and compressive resilience modulus.With the decrease of RAP aging degree,the properties of frost resistance,low temperature cracking resistance and water stability were significantly enhanced.[Conclusions]Due to the different degree of RAP aging,the mechanical properties,high and low temperature stability,frost resistanc and water stability of cement stabilized gravel base materials were significantly different.RAP with different aging degrees should be reasonably selected,according to the material performance indexes.
作者
肖华
王洪奎
朱啟昌
魏新园
李豪
XIAO Hua;WANG Hongkui;ZHU Qichang;WEI Xinyuan;LI Hao(China Gezhouba Group Road&Bridge Co.,Ltd.,Yichang 443000,China;Luohe Urban Investment Holding Group Co.,Ltd.,Luohe 462000,China;Henan Communications Planning&Design Institute Co.,Ltd.,Zhengzhou 450000,China)
出处
《河南科技》
2025年第3期70-74,共5页
Henan Science and Technology
关键词
沥青铣刨料
水泥稳定碎石
半刚性基层
老化
力学性能
耐久性能
asphalt milling material
cement-stabilized macadam
semi-rigid base
aging
mechanical property
durability
