冯玉洁, 朱建平, 王立,等.氧化石墨烯对矿渣水泥抗压强度及微观结构的影响[J].河南理工大学学报（自然科学版）,2021,40(6):169-175.

FENG Y J, ZHU J P, WANG L,et al.Effect of graphene oxide on compressive strength and microstructure of slag cement[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(6):169-175.

氧化石墨烯对矿渣水泥抗压强度及微观结构的影响

冯玉洁1, 朱建平1, 王立2, 冯春花1, 孙钰江1, 李根深1, 李东旭3

1.河南理工大学 材料科学与工程学院,河南 焦作 454000;2.河南建筑材料研究设计院有限公司,河南 郑州 450002;3.南京工业大学 材料科学与工程学院,江苏 南京 211816

摘要:为克服矿渣水泥早期强度偏低问题，以氧化石墨烯作为纳米添加剂掺入矿渣水泥中，通过改变氧化石墨烯的掺量，以抗压强度和水化产物为研究对象，进行抗压强度测试试验，并采用X射线衍射、扫描电子显微镜、热分析和纳米压痕等测试方法对水化产物和微观结构进行表征。结果表明：氧化石墨烯可以促进矿渣水泥的水化进程，提高抗压强度，最佳掺量为0. 08％；氧化石墨烯在水化过程中起到填充作用和晶核作用，从而提高抗压强度，生成更多水化产物，水化产物中高密度C—S—H凝胶比例增大。该研究结果为改善矿渣水泥早期抗压强度提供了新思路。

关键词:氧化石墨烯;矿渣水泥;水化产物;力学性能;微观结构

doi:10.16186/j.cnki.1673-9787.2020030023

基金项目:国家自然科学基金资助项目（51872137）

收稿日期:2020/03/09

修回日期:2020/05/13

出版日期:2021/11/15

Effect of graphene oxide on compressive strength and microstructure of slag cement

FENG Yujie1, ZHU Jianping1, WANG Li2, FENG Chunhua1, SUN Yujiang1, LI Genshen1, LI Dongxu3

1.School of Materials Science and Engineering， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China;2.Henan Building Materials Research and Design Institute Co. ， Ltd. ， Zhengzhou  450002 ， Henan， China;3.School of Materials Science and Engineering， Nanjing Tech University， Nanjing  211816，Jiangsu，China

Abstract:Slag cement has a problem of poor early strength. In this paper ， the early strength was improved by incorporation of graphene oxide as nano additive. By changing the content of graphene oxide， the compressive strength and hydration products of slag cement paste were studied. The hydration products and microstructure were characterized by X-ray diffraction， scanning electron microscope ， thermal analysis ， and nanoindentation. The results showed that graphene oxide could accelerate the hydration degree and enhance the compressive strength in slag cement， The optimum dosage was 0.08 % . The reasons for the improvement of cement were that graphene oxide played a major part of interstitial filling and crystal nucleus in hydration process of slag cementand the more hydration products in slag cement paste was formed. The ratio of HD C—S—H in hydration products was bigger. The conclusions of this study could provide a new way to improve the early compressive strength of slag cement.

Key words:graphene oxide;slag cement;hydration product;mechanical property;microstructure

 氧化石墨烯对矿渣水泥抗压强度及微观结构的影响_冯玉洁.pdf