钢铁渣沥青混凝土的疲劳性能研究  

Research on Fatigue Performance of Asphalt Concrete Incorporating Steel Slag and Iron Slag

作　　者：巩祥林 李希 李钰鑫 陈宗武 GONG Xiang-lin;LI Xi;LI Yu-xin;CHEN Zong-wu(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074

出　　处：《建材世界》2025年第2期48-51,共4页The World of Building Materials

基　　金：2024年大学生创新创业训练项目(S202410491206).

摘　　要：该研究采用四点弯曲疲劳寿命试验分析了冻融循环水损害前后钢铁渣沥青混凝土的疲劳性能特征。结果表明,钢铁渣显著提升了沥青混凝土的疲劳寿命:当微应变为400~600时,钢铁渣沥青混凝土的疲劳寿命比普通砂石沥青混凝土高出7.7%~27.1%;施加冻融循环水损害后,钢铁渣沥青混凝土仍将这一优势保持在7.6%~26.6%。同时,钢铁渣还明显改善了沥青混凝土的疲劳耐久性:根据双对数疲劳方程,冻融循环水损害前后,钢铁渣沥青混凝土的b值分别为3.695和3.926,而普通砂石沥青混凝土的b值则分别为4.102和4.324,前者始终更小。In this research,the fatigue performance characteristics of asphalt concrete incorporating steel slag and iron slag before and after freeze-thaw cycle water damage is analyzed using four-point bending fatigue life test.Results demonstrate that steel slag and iron slag significantly enhance the fatigue life of asphalt concrete.When micro strain levels ranging from 400 to 600,the fatigue life of asphalt concrete incorporating steel slag and iron slag is 7.7%to 27.1%higher than that of asphalt concrete incorporating conventional sand and gravel.After subjecting the specimens to freeze-thaw cycle water damage,asphalt concrete incorporating steel slag and iron slag maintains this advantage,with fatigue life increases ranging from 7.6%to 26.6%.Additionally,steel slag and iron slag markedly improve the fatigue durability of asphalt concrete.According to the double logarithmic fatigue equation,the b values for asphalt concrete incorporating steel slag and iron slag are 3.695 and 3.926 before and after freeze-thaw damage,respectively,whereas those for asphalt concrete incorporating conventional sand and gravel are 4.102 and 4.324.The former values are consistently smaller than the latter.

关 键 词：钢渣 铁渣 沥青混凝土 疲劳性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]