煤系高岭土固化拜耳法赤泥的强度机理研究  

Study on Strength Mechanism of Coal Metakaolin Solidi fied Bayer Red Mud

作　　者：刘剑平[1] 卢仪思 李贝宁 白晓红[1,2] Liu Jianping;Lu Yisi;Li Beining;Bai Xiaohong(College of Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024;Key Laboratory of Geotechnical and Underground Engineering of Shanxi Province,Taiyuan,Shanxi 030024)

机构地区：[1]太原理工大学土木工程学院,山西太原030024 [2]山西省岩土与地下工程重点实验室,山西太原030024

出　　处：《非金属矿》2020年第3期103-106,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51879180);山西省高等学校大学生创新创业训练计划项目(2019096)。

摘　　要：通过测试不同煤系偏高岭土掺量下,煤系偏高岭土固化拜耳法赤泥形成复合体的抗压强度,发现煤系偏高岭土可有效固化拜耳法赤泥。结合X射线衍射(XRD)、微观扫描电镜(SEM)及煤系偏高岭土水化的化学反应方程式,对复合体的物相组成和微观结构进行分析,阐明了煤系偏高岭土固化拜耳法赤泥的强度机理,利用强度机理解释了随着煤系偏高岭土掺量变化,宏观抗压强度变化的原因。The compressive strength of the coal metakaolin-Bayer red mud solidification was tested under different contents of coal metakaolin.Combined with X-ray diffraction(XRD)phase analysis technology,micro-scanning electron microscope(SEM)image testing technology and chemical hydrated reaction equations of coal metakaolin,the phase composition and microstructure of the solidification were analyzed.The strength mechanism of coal metakaolin solidified Bayer red mud was clarified.The reasons for the change in macroscopic compressive strength with the change of coal metakaolin content was explained by the strength mechanism.

关 键 词：煤系偏高岭土 拜耳法赤泥 物相分析 微观结构 

分 类 号：TU411.6[建筑科学—岩土工程] X752[建筑科学—土工工程]