立体构造石墨烯对水泥浆孔隙结构与力学性能的影响  

Effect of three-dimensional graphene on the pore structure and mechanical properties of cement paste

作　　者：应敬伟[1] 陈双仁 席晓莹 蒋志君 YING Jingwei;CHEN Shuangren;XI Xiaoying;JIANG Zhijun(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004

出　　处：《混凝土》2023年第7期57-60,65,共5页Concrete

基　　金：国家自然科学基金(51768005);广西自然科学基金(2018GXNSFAA281333)。

摘　　要：为研究立体构造石墨烯(3DG)对水泥浆的影响,首先对立体构造石墨烯进行了表征,然后进行了微观形貌、孔隙结构和抗压强度测试。结果表明:3DG是由二维石墨烯片构成的具有三维蜂窝状的石墨烯材料。3DG以其较大的比表面积作为水化产物的生长载体,形成致密均匀的整体结构。同时减小了水泥浆的孔隙率和最可几孔径,促使有害孔向少害孔转变。当3DG掺量为0.1%时,试块抗压强度最大,与空白组相比,试块112 d的抗压强度提升48.29%。To investigate the effect of three-dimensional graphene(3DG)on cement paste,the three-dimensional graphene was characterized,and then the micro morphology,pore structure and compressive strength were tested.The results indicate that 3DG is a three-dimensional honeycomb graphene material composed of two-dimensional graphene sheets.3DG is used as the growth carrier of hydration products because of its large specific surface area and form a dense and uniform overall structure.At the same time,the porosity and the most probable pore size of the cement paste are reduced.The addition of 3DG makes the harmful pores change to less harmful pores.When the content of 3DG is 0.1%,the compressive strength of the sample is the largest.Compared with the blank group,the compressive strength of 112 d is increased by 48.29%.

关 键 词：立体构造石墨烯 水泥浆 微观结构 孔隙结构 力学性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]