全铁尾矿骨料混凝土的工作性、力学性能及耐久性能研究  

Study on Workability,Mechanical Properties and Durability of All-iron Tailings Aggregate Concrete

作　　者：康迎杰 郭自利[1] 潘鹏[1,2] KANG Ying-jie;GUO Zi-li;PAN Peng(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学土木工程系,北京100084 [2]清华大学土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《混凝土与水泥制品》2022年第4期89-93,共5页China Concrete and Cement Products

基　　金：国家重点研发计划项目(2019YFC1907204)。

摘　　要：利用铁尾矿机制砂石完全替代天然砂石,制备了全铁尾矿骨料混凝土,研究了全铁尾矿骨料混凝土和天然骨料混凝土的工作性、力学性能和耐久性能差异。结果表明:在工作性方面,需通过调配外加剂的方法来保证全铁尾矿骨料混凝土良好的工作性;在力学性能方面,全铁尾矿骨料混凝土的抗压、抗折和劈裂抗拉强度与天然骨料混凝土相比差别不大;在耐久性能方面,全铁尾矿骨料混凝土的抗氯离子渗透性能、抗碳化性能、抗冻性能及抗硫酸盐侵蚀性能均与天然骨料混凝土接近。Using iron tailings machine-made sand and stone to completely replace natural sand and stone,all-iron tailings aggregate concrete was prepared,and the difference between all-iron tailings aggregate concrete and natural aggregate concrete in workability,mechanical properties and durability was studied.The results show that in terms of workability,it is recommended to ensure the good workability of all-iron tailings aggregate concrete by mixing admixtures.In terms of mechanical properties,the compressive,flexural and splitting tensile strength of all-iron tailings aggregate concrete are little different from those of natural aggregate concrete.In terms of durability,the chloride ion penetration resistance,carbonation resistance,frost resistance and sulfate resistance of all-iron tailings aggregate concrete are close to those of natural aggregate concrete.

关 键 词：铁尾矿 天然骨料 混凝土 工作性 力学性能 耐久性能 

分 类 号：TU528.1[建筑科学—建筑技术科学]