硫酸镁侵蚀作用下高流态水泥砂浆的早期强度劣化特征  

Deterioration characteristics of early strength for high fluidization cement mortar under magnesium sulfate corrosion

作　　者：王健[1] 李敏[1] 陈净纯 赵泽栋 赵洪波 任皎龙 WANG Jian;LI Min;CHEN Jingchun;ZHAO Zedong;ZHAO Hongbo;REN Jiaolong(School of Architectural Engineering and Spatial Information,Shandong University of Technology,Zibo 255049,China;School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学建筑工程与空间信息学院,山东淄博255049 [2]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2024年第3期42-50,共9页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51808326)。

摘　　要：高流态早强(HFES)水泥砂浆被广泛应用于土木工程的各个领域。在复杂的工程环境下,HFES水泥砂浆的硫酸盐侵蚀不容忽视。尽管硫酸盐对水泥基材料性能的影响已有一些研究,但HFES水泥砂浆与传统水泥基材料相比有明显不同,其在硫酸盐侵蚀情况下的劣化机制尚不明确。本文研究了不同硫酸镁溶液浓度和侵蚀时间下HFES水泥砂浆的早期抗折和抗压强度,通过扫描电镜(SEM)、X射线衍射(XRD)和差示扫描量热仪(DSC)测试,分析了硫酸镁溶液浓度和侵蚀次数对HFES水泥砂浆微观结构和水化产物的影响,揭示了硫酸镁对HFES水泥砂浆早期强度形成的影响机制。High fluidization early strength(HFES)cement mortar has been widely used in various fields of civil engineering.Due to the complexity of the engineering environment,sulfate corrosion for HFES cement mortar cannot be ignored.Although the effects of sulfate on the properties of cement-based materials have been studied,the deterioration mechanism of HFES cement mortar under sulfate attack is still not clear due to the significant characteristics of HFES cement mortar compared to traditional cement based materials.In this research,we studied the early flexural and compressive strength of HFES cement mortar under different magnesium sulfate concentrations and erosion times.The effects of magnesium sulfate concentrations and erosion times on the microstructure and hydration products of HFES cement mortar were analyzed by scanning electron microscopy(SEM),X-ray diffraction(XRD)and differential scanning calorimetry(DSC).The influence mechanisms of magnesium sulfate on the early strength formation of HFES cement mortar were revealed.

关 键 词：高流态水泥砂浆 劣化特征 早期强度 硫酸镁 侵蚀 

分 类 号：TB532.1[理学—物理] TB553[理学—声学]