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石墨烯量子点对水泥砂浆流动度、强度和耐盐腐蚀性的影响

桂尊曜 蒲云东 张惠一 袁小亚 黎少伟 邵伟升

桂尊曜, 蒲云东, 张惠一, 等. 石墨烯量子点对水泥砂浆流动度、强度和耐盐腐蚀性的影响[J]. 复合材料学报, 2024, 41(4): 2043-2054. doi: 10.13801/j.cnki.fhclxb.20230810.001
引用本文: 桂尊曜, 蒲云东, 张惠一, 等. 石墨烯量子点对水泥砂浆流动度、强度和耐盐腐蚀性的影响[J]. 复合材料学报, 2024, 41(4): 2043-2054. doi: 10.13801/j.cnki.fhclxb.20230810.001
GUI Zunyao, PU Yundong, ZHANG Huiyi, et al. Effect of graphene quantum dots on fluidity, strength and salt corrosion resistance of cement mortar[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2043-2054. doi: 10.13801/j.cnki.fhclxb.20230810.001
Citation: GUI Zunyao, PU Yundong, ZHANG Huiyi, et al. Effect of graphene quantum dots on fluidity, strength and salt corrosion resistance of cement mortar[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2043-2054. doi: 10.13801/j.cnki.fhclxb.20230810.001

石墨烯量子点对水泥砂浆流动度、强度和耐盐腐蚀性的影响

doi: 10.13801/j.cnki.fhclxb.20230810.001
基金项目: 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)
详细信息
    通讯作者:

    袁小亚,博士,教授,博士生导师,研究方向为纳米复合材料、建筑功能材料、高性能水泥混凝土等领域 E-mail: yuanxy@cqjtu.edu.cn

  • 中图分类号: TB332;TU528

Effect of graphene quantum dots on fluidity, strength and salt corrosion resistance of cement mortar

Funds: National Natural Science Foundation of China (51402030); Chongqing Technical Innovation and Application Development Special Key Project (CSTB2022TIAD-KPX0031); Key Project of Basic Science and Frontier Technology Research of Chongqing Science and Technology Commission (cstc2017jcyjBX0028); Chongqing Graduate Tutor Team Construction Project (JDDSTD2022006); China High-end Foreign Expert Program (G2022035007L); Natural Science Foundation of Chongqing (Genetic Program) (2022NSCQ-MSX1165); Chongqing Jiaotong University Postgraduate Science and Technology Innovation Project (2023S0090); Chongqing Jiaotong University School Enterprise Cooperation Project (cqjt-2022-036)
  • 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。

     

  • 图  1  GQDs的XRD图谱

    Figure  1.  XRD pattern of GQDs

    图  2  GQDs的XPS全谱图

    Figure  2.  XPS full spectrum of GQDs

    图  3  GQDs的C1s高分辨XPS图谱

    Figure  3.  C1s high resolution XPS map of GQDs

    图  4  GQDs的O1s高分辨 XPS图谱

    Figure  4.  O1s high resolution XPS map of GQDs

    图  5  GQDs的TEM图像

    Figure  5.  TEM images of GQDs

    图  6  GQDs的AFM图像

    Figure  6.  AFM image of GQDs

    图  7  GQDs、GO溶液的紫外可见吸收光谱

    Figure  7.  UV-visible absorption spectra of GQDs and GO solutions

    图  8  GQDs、GO在饱和Ca(OH)2溶液的吸光度变化

    Figure  8.  Absorbance changes of GQDs and GO in saturated Ca(OH)2 solution

    图  9  GQDs、GO在饱和Ca(OH)2溶液中静置情况

    Figure  9.  GQDs and GO were static in saturated Ca(OH)2 solution

    图  10  不同GQDs掺量对砂浆流动度的影响

    Figure  10.  Effect of different GQDs contents on mortar fluidity

    图  11  不同GQDs掺量对砂浆抗折强度的影响

    Figure  11.  Effect of different GQDs contents on flexural strength of mortar

    图  12  不同GQDs掺量对砂浆抗压强度的影响

    Figure  12.  Effect of different GQDs contents on compressive strength of mortar

    图  13  不同GQDs掺量对砂浆抗渗压力的影响

    Figure  13.  Influence of different GQDs contents on impermeability pressure of mortar

    图  14  不同GQDs掺量对砂浆耐腐蚀系数的影响

    Figure  14.  Influence of different GQDs contents on corrosion resistance coefficient of mortar

    图  15  不同GQDs掺量水泥砂浆孔径分布

    Figure  15.  Pore size distribution of cement mortar with different GQDs contents

    图  16  不同GQDs掺量水泥砂浆SEM图像:((a), (b)) 普通水泥砂浆;((c), (d)) 0.04wt%GQDs/C

    Figure  16.  SEM images of mortars with different GQDs contents: ((a), (b)) Ordinary cement mortar; ((c), (d)) 0.04wt%GQDs/C

    C-S-H—Hydrate calcium silicate; AFt—Ettringite

    表  1  水泥物理性能

    Table  1.   Physical properties of the cement

    Water requirement
    of normal
    consistency/%
    Specific surface
    area/(m2·kg−1)
    Density/
    (g·cm−3)
    Setting time/minFlexural strength/MPaCompression strength/MPa
    InitialFinal3 d28 d3 d28 d
    27.83513.151362445.16.325.643.4
    下载: 导出CSV

    表  2  石墨烯量子点(GQDs)和氧化石墨烯(GO)的饱和Ca(OH)2溶液的配制

    Table  2.   Preparation of saturated Ca(OH)2 solution with graphene quantum dots (GQDs) and graphene oxide (GO)

    SampleWater/mLCa(OH)2/gGQDs/mLGO/mL
    X1900.1610
    X2900.1610
    Notes: —GQDs solution concentration is 0.2 mg/mL; —GO solution concentration is 0.2 mg/mL.
    下载: 导出CSV

    表  3  不同GQDs掺量的水泥砂浆配合比

    Table  3.   Mix ratios of cement mortars with different contents of GQDs

    SampleS/gC/gPCE/gW/g
    Blank13504501.35170
    0.01wt%GQDs/C13504501.35170
    0.02wt%GQDs/C13504501.35170
    0.03wt%GQDs/C13504501.35170
    0.04wt%GQDs/C13504501.35170
    0.05wt%GQDs/C13504501.35170
    0.01wt%GO/C13504501.35170
    0.02wt%GO/C13504501.35170
    0.03wt%GO/C13504501.35170
    0.04wt%GO/C13504501.35170
    0.05wt%GO/C13504501.35170
    Notes: —Content of GQDs is its mass ratio to C; —Content of GO is its mass ratio to C; C—Cement; S—Sand; W—Water; PCE—Polycarboxylate.
    下载: 导出CSV

    表  4  GQDs砂浆抗渗试件配合比

    Table  4.   Mix ratio of GQDs modified cement mortar for impermeability pressure test

    SampleS/gC/gW/g
    Blank1350320260
    0.01wt%GQDs/C1350320260
    0.02wt%GQDs/C1350320260
    0.03wt%GQDs/C1350320260
    0.04wt%GQDs/C1350320260
    0.05wt%GQDs/C1350320260
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-06-08
  • 修回日期:  2023-07-20
  • 录用日期:  2023-07-27
  • 网络出版日期:  2023-08-10
  • 刊出日期:  2024-04-15

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