原状粉煤灰-铁尾矿泡沫混凝土的性能研究  

Study on Properties of Original Fly Ash-iron Tailings Foam Concrete

作　　者：孙婧 王宏 陈静 安艳玲 兰建伟 刘宏波 SUN Jing;WANG Hong;CHEN Jing;AN Yan-ling;LAN Jian-wei;LIU Hong-bo(College of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,China;Hebei Key Laboratory for Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou 075000,China;Hebei Colleges Applied Technology Research Center of Health Monitoring and Maintenance of Road and Bridge Structures,Zhangjiakou 075000,China;Zhangjiakou Construction Engineering Quality Inspection Center,Zhangjiakou 075000,China)

机构地区：[1]河北建筑工程学院土木工程学院,河北张家口075000 [2]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000 [3]河北省高校道桥结构健康监测与维修加固应用技术研发中心,河北张家口075000 [4]张家口市建设工程质量检测中心,河北张家口075000

出　　处：《混凝土与水泥制品》2021年第5期100-104,共5页China Concrete and Cement Products

基　　金：河北省科技厅重点研发计划项目(20373802D);张家口市科技计划项目(1811009B-05)。

摘　　要：采用Design-Expert软件研究了原状粉煤灰及铁尾矿砂对泡沫混凝土干密度、吸水率及抗压强度的影响,并观察了泡沫混凝土断面的细观结构。结果表明:原状粉煤灰掺量的增加会使泡沫混凝土的干密度和吸水率降低,当原状粉煤灰掺量占胶凝材料的40%时,泡沫混凝土的抗压强度最高;固定粉煤灰掺量为40%,铁尾矿砂掺量在0~50%范围内增加会使泡沫混凝土的干密度和抗压强度增加,吸水率降低;当原状粉煤灰掺量<40%时,原状粉煤灰掺量越多,泡沫混凝土内部的气泡越稳定;铁尾矿砂掺量的增加可使泡沫混凝土的孔径减小,密实度增加。The influence of original fly ash and iron tailings on dry density,water absorption and compressive strength of foam concrete was studied by Design-Expert software,and the microstructure of foam concrete was observed.The results show that the dry density and water absorption rate of foam concrete decrease with the increase of raw fly ash content,and when the original fly ash content is 40%,the compressive strength of foam concrete is the highest.When the fixed fly ash content is 40%,the increase of iron tailings content in the range of 0~50%can increase the dry density and compressive strength of foam concrete,but reduce the water absorption.When the original fly ash content is less than 40%,the more the raw fly ash content,the more stable the bubbles inside the foam concrete.The increase of the iron tailings content can reduce the pore size of foam concrete and increase the density.

关 键 词：泡沫混凝土 原状粉煤灰 铁尾矿砂 Design-Expert软件 性能 

分 类 号：TU528.2[建筑科学—建筑技术科学]