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Repetitive heating performance of MgO-activated ground granulated blast furnace slag composites containing MWCNTs
Functional Composites and Structures Pub Date : 2021-02-06 , DOI: 10.1088/2631-6331/abdd97
Jinho Bang , Hyeong Min Park , Beomjoo Yang

Recently, various studies have been conducted in an effort to apply the outstanding properties of nanomaterials to construction fields. The present study aims to investigate the repetitive heating characteristics of magnesium oxide (MgO)-activated slag composites containing multi-walled carbon nanotubes (MWCNTs). MgO-activated slag composites with various mix proportions were fabricated through facile mechanical mixing method and cured at various temperatures. The electrical resistivity and compressive strength of the specimens were measured, and the cyclical heating performance was also analyzed under a constant ampere condition. Microstructural and thermal analyses of the MgO-activated slag composites were carried out by means of a scanning electron microscope and a thermogravimetry analysis, respectively. The content of MWCNTs and the curing conditions affected the overall electrical resistivity, compressive strength, and heat-generation properties of the composites. Here, related mechanisms are addressed in connection with the hydration process of the binder material.



中文翻译:

含MWCNTs的MgO活化的粉状高炉矿渣复合材料的重复加热性能

近来,已经进行了各种研究以努力将纳米材料的优异性能应用于建筑领域。本研究旨在研究含多壁碳纳米管(MWCNT)的氧化镁(MgO)活化炉渣复合材料的重复加热特性。采用简便的机械混合法制备了不同配合比的MgO活化矿渣复合材料,并在不同温度下进行了固化。测量样品的电阻率和抗压强度,并在恒定安培条件下分析循环加热性能。分别通过扫描电子显微镜和热重分析对MgO活化的炉渣复合材料进行了显微组织和热分析。MWCNT的含量和固化条件影响复合材料的整体电阻率,抗压强度和生热性能。在此,结合粘合剂材料的水合过程提出了相关的机理。

更新日期:2021-02-06
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