摘要
目的 研究钢渣粗骨料取代率与不同强度等级对钢渣混凝土应力-应变特征、破坏形态、抗压强度、弹性模量、峰值应力及峰值应变的影响。方法 通过对钢渣粗骨料混凝土进行单轴受压试验,在分析试验结果的基础上,建立钢渣粗骨料混凝土单轴受压应力-应变关系式,并结合微观手段分析混凝土内部的破坏形态。结果 钢渣粗骨料混凝土的破坏形态和应力-应变全曲线形状与普通碎石混凝土相似;钢渣混凝土的棱柱体抗压强度与立方体抗压强度的比值高于普通混凝土;钢渣混凝土峰值应力和峰值应变随取代率的增加而增大,峰值应力随钢渣混凝土强度的增加而增加,峰值应随混凝土强度的增加而减小;弹性模量受钢渣取代率的影响较小,随强度等级的增大稍有提高;泊松比随取代率和强度等级的提高而减小。结论 钢渣粗骨料的性能优于普通混凝土,用钢渣替代粗骨料可同时满足工程需要和固废再利用的目标。
To investigate the effect of steel slag coarse aggregate replacement rate and different strength grades on stress-strain characteristics, damage morphology, compressive strength, elastic modulus, peak stress and peak strain of steel slag concrete.through the uniaxial compression test of steel slag coarse aggregate concrete, based on the analysis of the test results, the stress-strain relationship of steel slag coarse aggregate concrete under uniaxial compression was established, and the failure mode inside the concrete were analyzed by combining the microscopic means.The failure mode and stress-strain curve shape of steel slag coarse aggregate concrete are similar to those of ordinary gravel concrete.The ratio of prismatic compressive strength to cube compressive strength of steel slag concrete is higher than that of ordinary concrete;the peak stress and peak strain of steel slag concrete increase with the increase of substitution rate, the peak stress increases with the increase of steel slag concrete strength, and the peak value should decrease with the increase of concrete strength.The elastic modulus is less affected by the substitution rate of steel slag, and slightly increases with the increase of strength grade.Poisson′s ratio decreases with the increase of substitution rate and strength grade.The performance of steel slag coarse aggregate is better than that of ordinary concrete.Steel slag can replace coarse aggregate and meet the needs of engineering and the goal of solid waste recycling.
作者
王晨霞
刘军
曹芙波
仝晓文
贾永杰
WANG Chenxia;LIU Jun;CAO Fubo;TONG Xiaowen;JIA Yongjie(School of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou,China,014010;Intelligent Construction and Operation Engineering Research Center at Universities of Inner Mongolia Autonomous Region,Baotou,China,014010;School of Architectural Engineering,Guangdong Business and Technology University,Zhaoqing,China,526000;Construction Engineering Technology Service Center at Baotou Jiuyuan District,Inner Mongolia,China,014000;Inner Mongolia Electric Power Construction(Group)Company Limited,Hohhot,China,010091)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第6期1096-1103,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51868061)
内蒙古自治区自然科学基金项目(2020MS05071,2022LHMS05011)。
