掺RAP和铁尾矿砂的水泥稳定碎石受力特性试验研究Experimental study on the mechanical characteristics of cement stabilized macadam with RAP and iron tailings sand
张立群;周辉;崔宏环;张学峰;王晟华;
摘要(Abstract)：
为研究掺RAP和铁尾矿砂的水泥稳定碎石基层材料受力特性，对17组不同配合比的水泥稳定碎石基层材料进行单轴抗压强度试验，揭示单轴受压下水泥稳定碎石基层材料应力-应变全曲线和变形模量-应变全曲线的变化规律，分析各因素掺量对水泥稳定碎石基层材料的峰值应力、峰值应变、模量、应变能密度和脆性指数的影响规律.结果表明：不同水泥、RAP、铁尾矿砂掺量的水泥稳定碎石基层材料应力-应变全曲线均由上升段和下降段组成，模量-应变全曲线呈先下降后上升再下降的趋势，不同配比下试件的破坏过程也相似；水泥掺量增加，水泥稳定碎石基层材料的峰值应变减小，峰值应力、模量、应变能密度和脆性指数均增大；RAP和铁尾矿砂掺量增加，水泥稳定碎石基层材料的峰值应变增大，峰值应力、模量、应变能密度和脆性指数均减小.
关键词(KeyWords)： 受力特性;RAP和铁尾矿砂;应力-应变全曲线;变形模量-应变全曲线;抗压强度
基金项目(Foundation): 国家自然科学基金（51878242）;; 张家口市科技局科技计划项目（1911032A）;; 河北省教育厅重点项目（ZD2020325）
作者(Authors): 张立群;周辉;崔宏环;张学峰;王晟华;
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