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宣    恒¹ , 孟    和² , 张   志² , 王宏文² , 卢天喜³ , 叶云涛⁴

 

(1. 北京市政路桥股份有限公司 , 北京    100071;

2. 国家石油天然气管网集团有限公司建设项目管理分公司 , 廊坊   065000;

3. 焦作大学 土木建筑工程学院 , 焦作   454000; 4. 雄安雄创数字技术有限公司 , 雄安    071700)

摘  要: 为解决大空隙排水沥青混合料骨架结构稳定性不足、抗堵塞性能难以精准调控的问题 , 以粗集料嵌挤咬合为核心 , 选用公称最大粒径、CA 比值、目标空隙率等关键参数 , 基于多因素变量控制思路 , 构建起骨架结构参数设计体系 , 结合 CT 扫描技术开展骨架结构与抗堵塞性能的试验分析及参数优化研究。结果表明 : CA 比值控制在 0. 35~0. 55 时可形成稳定嵌挤骨架 , 其中 0. 45 时其抗堵塞性能最优 , 完全堵塞需用堵塞物 2. 8 kg/m2 ; 公称最大粒径与目标空隙率均与 VCAratio 呈正相关 , 二者增大能够显著降低渗透系数衰减率 ; 堵塞物细颗粒占比越高 , 抗堵塞性能越差 , 占比从 30%增至 70%时 , 渗透系数衰减率增加 7. 7%。最终确定最优骨架结构参数组合为公称最大粒径 16 mm、CA 比值 0. 45、 目标空隙率 21%、最佳沥青用量 3. 4%、沥青膜厚度 14. 5 μm, 其抗堵塞性能优良且骨架稳定 。综合来看 , 该参数组合可为大空隙排水沥青混合料的工程设计与性能调控提供可靠参考。

关键词: 沥青混合料 ; 骨架结构参数 ; 抗堵塞性能 ; CA 比值 ; 公称最大粒径 ; 目标空隙率

中图分类号: U414      文献标志码: A      文章编号: 1005-8249 (2026) 04-0044-07

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 04. 007

 

Effect of Skeleton Parameters on Clogging Performance of Porous Asphalt Mixture

XUAN Heng¹ , MENG He² , ZHANG Zhi² , WANG Hongwen² , LU Tianxi³ , YE Yuntao⁴

(1. Beijing Municipal Road & Bridge Co. , Ltd. , Beijing 100071, China;

2. Project Management Branch, National Oil and Gas Pipeline Network Group Co. , Ltd. , Langfang 065000, China;

3. School of Civil Engineering and Architecture, Jiaozuo University, Jiaozuo 454000, China;

4. Xiong ’an Xiongchuang Digital Technology Co. , Ltd. , Xiong ’an 071700, China)

Abstract : To address the problems of insufficient skeleton structure stability and difficulty in precise regulation of anti-clogging performance of large-void drainage asphalt mixture, this study takes the interlocking effect of coarse aggregates as the core. Key parameters including nominal maximum aggregate size, CA ratio and target voidage are selected. A design system for skeleton

structure parameters is established based on the multi-factor variable control method. Combined with CT scanning technology, empirical analysis and parameter optimization are conducted on the skeleton structure and anti-clogging performance. The results show that a stable interlocking skeleton can be formed when the CA ratio ranges from 0. 35 to 0. 55, and the optimal anti - clogging performance is achieved at a CA ratio of 0. 45, with the mass of clogging material reaching 2. 8 kg/m2 for complete clogging. Both the nominal maximum aggregate size and target voidage are positively correlated with VCA ratio, and their increase can remarkably reduce the attenuation rate of permeability coefficient. A higher proportion of fine particles in clogging materials leads to poorer anti - clogging performance; when the proportion rises from 30% to 70% , the attenuation rate of permeability coefficient increases by 7. 7%. The optimal combination of skeleton structure parameters is determined as follows: nominal maximum aggregate size of 16 mm, CA ratio of 0. 45, target voidage of 21% , optimal asphalt content of 3. 4% and asphalt film thickness of 14. 5 μm. The corresponding mixture possesses excellent anti-clogging performance and stable skeleton structure. Overall, this parameter combination can provide a reliable reference for the engineering design and performance regulation of large-void drainage asphalt mixture.

Key words: asphalt mixture; skeleton structure parameter; anti-clogging performance; CA ratio; nominal maximum aggregate size; target void ratio