铁道科学与工程学报2024，Vol.21Issue(7)：2766-2777,12.DOI:10.19713/j.cnki.43-1423/u.T20231625
透水型建筑固废再生水稳材料疲劳性能试验及预测模型
Experimental investigation and prediction model of fatigue performance of cement-stabilized permeable recycled aggregate materials from construction solid waste
摘要
Abstract
To investigate the application and durability improvement of recycled aggregates from construction demolition wastes(CDWs)in cement-stabilized crushed stone base for permeable road.The marginal aggregates recycled from CDWs were used to partially replace natural virgin aggregates for preparing cement-stabilized permeable recycled aggregate(CPRAM)specimens.The unconfined compressive strength tests,permeability tests,and four-point bending fatigue tests were used to test the mechanical properties of CPRAM.The dissipated energy of the CPRAM specimens during the fatigue loading process was analyzed with energy theory,and the fatigue damage model was established based on the dissipated energy to analyze the fatigue damage evolution of the CPRAM specimens.The research results show that the compressive strength and coefficient of permeability of the CPRAM specimens satisfy the performance requirements specified for most types of roads in China.The cumulative dissipated energy of the specimens increases exponentially with the peak fatigue stress rises.The dissipated energy generated in a single fatigue stress loading and unloading cycle has a strong correlation with the fatigue stress ratio values,the dissipated energy of the specimens with fatigue stress ratio of 0.75 and 0.85 increases 50%and 200%,respectively,compared with that of the specimens with fatigue stress ratio of 0.55 in each fatigue.The proportion of recycled aggregate in the specimen is increased.The amount of dissipated energy generated in a single loading will be reduced.The fatigue damage variables and the relative rate of change of fatigue damage of the specimen will be shown to be different degrees of increase.The fatigue life prediction model based on the peak fatigue stress and fatigue damage evolution can predict the fatigue life of the CPRAM materials under different levels of fatigue stress reasonably well.The research results can provide a reference for further improve the engineering application and long-term safe service of recycled aggregates from CDWs in cement-stabilized crushed stone base for permeable road.关键词
透水型基层/建筑固废/再生水泥稳定材料/疲劳损伤/疲劳寿命Key words
permeable road base/building demolition wastes/cement-stabilized recycled aggregate materials/fatigue damage/fatigue life分类
交通工程引用本文复制引用
杨涛,肖源杰,陈宇亮,李昀博,何庆宇,周震,李鼎硕..透水型建筑固废再生水稳材料疲劳性能试验及预测模型[J].铁道科学与工程学报,2024,21(7):2766-2777,12.基金项目
国家自然科学基金资助项目(52178443) （52178443）
国家重点研发计划项目(2019YFC1904704) （2019YFC1904704）
交通运输部重点科技项目(2022-MS5-122) （2022-MS5-122）
