doi:10.16186/j.cnki.1673-9787.2020030023

Received:2020/03/09

Revised:2020/05/13

Published: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