水力发电学报2025，Vol.44Issue(8)：71-80,10.DOI:10.11660/slfdxb.20250807
骨料最大粒径对防渗层沥青混凝土性能影响研究
Influence of maximum particle size of aggregate on performance of impermeable layer asphalt concrete
摘要
Abstract
Applicability of larger particle size aggregate in asphalt concrete used as impervious panel material helps reduce material costs while improving its mechanical properties.This paper presents a method that increases the maximum particle size Dmax of its concrete aggregate from 16 mm to 26.5 mm and 31.5 mm.Optimal mix parameters are obtained through mix proportion tests for three sets of asphalt concrete with different maximum particle sizes;Their splitting,uniaxial compression,tensile,and slope flow tests are conducted.The performances are compared and the influence of aggregate size on mechanical properties is examined.The results demonstrate the maximum particle size has a significant impact on both its mix proportion parameters and properties.With the maximum particle size increasing,the gradation index increases,while the specific surface area of aggregate and the asphalt-aggregate ratio both decreases(from 7.0%to 6.2%),reducing material costs effectively.Appropriate increase in the maximum particle size helps improve splitting strength(an increase of 4.02%)and compressive strength(an increase of 14.07%)of asphalt concrete,and reduce the slope flow value.However,when the maximum particle size is too large,tensile strength decreases(a reduction of 5.78%),brittle failure dominates the failure mode,and toughness and deformation adaptability are weakened.This study would lay a theoretical basis for further research on large particle size aggregates used in impermeable layer asphalt concrete to build pumped storage power station panels.关键词
水工沥青混凝土/骨料最大粒径/劈裂强度/抗压强度/抗拉强度/斜坡流淌值Key words
hydraulic asphalt concrete/maximum particle size of aggregate/splitting strength/compressive strength/tensile strength/slope flow value分类
建筑与水利引用本文复制引用
李炎隆,库得热提·热哈曼,董静,刘云贺,陈俊豪..骨料最大粒径对防渗层沥青混凝土性能影响研究[J].水力发电学报,2025,44(8):71-80,10.基金项目
国家自然科学基金重点项目(52039008) （52039008）
国家自然科学基金原创探索计划项目(52450064) （52450064）
国家杰出青年科学基金项目(52125904) （52125904）
