氧化石墨烯对碱矿渣水泥增韧效果研究  

Study on the toughness improvement effect of graphene oxide on alkali-activated slag cement

作　　者：黄南菊 郭振 余林文[2] 田义[2] HUANG Nanju;GUO Zhen;YU Linwen;TIAN Yi(Chongqing Construction Engineering Quality Supervision and Inspection Center Co.Ltd.,Chongqing 401147,China;Materials Science and Engineering College,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆建设工程质量监督检测中心有限公司,重庆401147 [2]重庆大学材料科学与工程学院,重庆400045

出　　处：《新型建筑材料》2023年第6期42-45,60,共5页New Building Materials

基　　金：国家自然科学基金项目(51778089)。

摘　　要：作为环保胶凝材料,碱矿渣水泥的低韧性限制了其大规模应用。采用改进Hummers法制备氧化石墨烯,研究不同掺量的氧化石墨烯对碱矿渣水泥水化放热、抗折强度、抗压强度和韧性的影响。结果表明:氧化石墨烯能够提高碱矿渣水泥后期水化放热,增大碱矿渣水泥后期水化程度;氧化石墨烯的掺入提高了碱矿渣水泥砂浆的抗折强度,略微降低其抗压强度,显著增加了碱矿渣水泥的韧性,当氧化石墨烯掺量为0.03%,碱矿渣水泥的韧性大幅提高,60 d折压比较空白组提高了51.9%。As a kind of environment-friendly cementing material,the low toughness of alkali-activated slag cement limits its wide application.The graphene oxide(GO)was prepared by modified Hummers'method in this study.The effects of different amounts of GO on the hydration heat release,flexural strength,compressive strength,and toughness of alkali-activated slag cement were studied.The results show that GO can increase the latter hydration release and hydration degree of alkali-activated slag cement.In addition,GO significantly improves the flexural strength of alkali-activated slag mortar but slightly decreases compressive strength,indicating its toughness can be significantly enhanced.At 60 d,when the addition of GO is 0.03%,the toughness of alkali-activated slag mortar can be enhanced by 51.9%compared to that of the reference sample.

关 键 词：氧化石墨烯 碱矿渣水泥 韧性 水化 强度 微结构 

分 类 号：TU528.57[建筑科学—建筑技术科学]