摘要
采用吸光度试验和静置沉降试验考察了石墨烯量子点(GQDs)在模拟水泥水化孔隙液的饱和氢氧化钙溶液中分散性能及其对掺配砂浆工作性能、力学性能和耐久性的影响。吸光度测试和静置沉降试验表明GQDs在饱和氢氧化钙溶液中具有优异的分散稳定性,工作性能测试表明GQDs对水泥砂浆的流动度几乎无负面影响。力学性能测试表明GQDs最佳掺量为0.04wt%时,28天抗折抗压强度比普通水泥砂浆分别提高了12.3%、12.5%,抗渗压力提升了175%,120天抗压耐腐蚀系数提升了14.3%。微观结构测试表明GQDs能改善孔径分布,填充纳米孔隙和提高水泥砂浆密实度。
The effect of dispersion of graphene quantum dots(GQDs)in saturated calcium hydroxide solution simulating cement hydration pore fluid was investigated by absorbance test and static settlement test,and the effect of workability,mechanical properties and durability of GQDs blended mortar was studied.The absorbance test and static settling test show that GQDs has excellent dispersion stability in saturated calcium hydroxide solution,and the workability test shows that GQDs has almost no negative effect on the flowability of cement mortar.Mechanical performance tests shows that the 28 days flexural and compressive strength of GQDs increase by 12.3%and 12.5%,compared with ordinary cement mortar at the optimum dose of 0.04wt%,the seepage pressure increases by 175%,and the 120 days compressive corrosion resistance coefficient increases by 14.3%.Microstructure tests show that GQDs could improve pore size distribution,fill nano-pores and improve the compactness of cement mortar.
作者
桂尊曜
蒲云东
张惠一
袁小亚
黎少伟
邵伟升
GUI Zunyao;PU Yundong;ZHANG Huiyi;YUAN Xiaoya;LI Shaowei;SHAO Weisheng(School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Advanced Functional Materials Research Institute,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing 2D Materials Institute,Chongqing 400714,China;Guangzhou Shunzhuo Energy Technology CO.,LTD.,Guangzhou 510000,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2024年第4期2043-2054,共12页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51402030)
重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0031)
重庆科委基础科学与前沿技术研究重点项目(cstc2017jcyjBX0028)
重庆市研究生导师团队建设项目(JDDSTD2022006)
高端外国专家引进计划(G2022035007L)
重庆市自然科学基金面上项目(2022NSCQ-MSX1165)
重庆交通大学研究生科创项目(2023S0090)
重庆交通大学校企合作项目(cqjt-2022-036)。
关键词
石墨烯
工作性能
力学性能
抗渗性能
微观结构
graphene
workability
mechanical properties
impermeability
microstructure
