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研磨活化再生微粉/多元复合胶凝材料的微观结构演变与碳足迹评价

高淑玲 张虎彪

高淑玲, 张虎彪. 研磨活化再生微粉/多元复合胶凝材料的微观结构演变与碳足迹评价[J]. 复合材料学报, 2024, 42(0): 1-15.
引用本文: 高淑玲, 张虎彪. 研磨活化再生微粉/多元复合胶凝材料的微观结构演变与碳足迹评价[J]. 复合材料学报, 2024, 42(0): 1-15.
GAO Shuling, ZHANG Hubiao. Microstructure evolution and carbon footprint evaluation of ground activated recycled powder / multi-component composite cementitious materials[J]. Acta Materiae Compositae Sinica.
Citation: GAO Shuling, ZHANG Hubiao. Microstructure evolution and carbon footprint evaluation of ground activated recycled powder / multi-component composite cementitious materials[J]. Acta Materiae Compositae Sinica.

研磨活化再生微粉/多元复合胶凝材料的微观结构演变与碳足迹评价

基金项目: 国家自然科学基金 (52179127);河北省自然科学基金 (E2023202030)
详细信息
    通讯作者:

    高淑玲,博士,教授,博士生导师,研究方向为复合材料微观结构分析、绿色节能建筑; E-mail: gaoshuling@hebut.edu.cn

  • 中图分类号: TB332; TU528.58

Microstructure evolution and carbon footprint evaluation of ground activated recycled powder / multi-component composite cementitious materials

Funds: National Natural Science Foundation of China (No.52179127); Natural science foundation of hebei province (No.E2023202030)
  • 摘要: 为大规模应用再生微粉(RP)替代普通硅酸盐水泥(OPC)作为辅助胶凝材料(SCM)。本研究旨在构建RP/多元复合胶凝材料(MCCM),通过抗压强度试验和XRD、FT-IR、SEM、BSE-EDS、TEM等微观测试手段,对RP/MCCM的强度发展、相组织演化和微观结构等进行了研究,并以生命周期评价(LCA)方法对RP/MCCM碳减排效益进行分析。研究发现:研磨活化后,RP掺量为30% (R30)时,28 d抗压强度在未活化的基础上提高7.6%。RP掺入后Al—OH增强,C—O和$\text{CO}_{3}^{2-} $键峰变窄,S元素分布均匀,有利于钙矾石(AFt)和CaCO3相的生成。CaCO3、Ca(OH)2、SiO2纳米结构在RP和粉煤灰(FA)分别复掺15%时(R15F15),其三元体系中紧密的结合在一起,未出现明显的断层,从而改善了其结构致密性和强度。此外,碳排放分析发现,RP掺入降低了原材料提取和运输过程碳排放,实现了减排目标。

     

  • 图  1  再生微粉(RP)生产和制备过程

    Figure  1.  Recycled powder (RP) manufacturing and preparation process

    图  2  原材料粒度分布检测

    Figure  2.  Detection of particle size distribution of raw materials

    图  3  原材料XRD和SEM检测结果

    Figure  3.  Results of raw materials XRD and SEM

    图  4  原材料SEM检测结果

    Figure  4.  SEM test results of raw materials

    图  5  RP/多元复合胶凝材料(MCCM)抗压强度试验结果

    Figure  5.  RP/multi-component composite cementitious material (MCCM) compressive strength test results

    图  6  RP/MCCM相对强度贡献率

    Figure  6.  The RP / MCCM relative intensity contribution rate

    图  7  RP/MCCM的28 d强度活性指数

    Figure  7.  28 d intensity activity index of RP / MCCM

    图  8  RP整形前后表面形貌

    Figure  8.  Surface topography before and after RP shaping

    图  9  不同龄期下RP/MCCM的XRD图谱

    Figure  9.  The XRD profiles at different instars of RP/MCCM

    图  10  不同龄期下RP/MCCM的FT-IR图谱

    Figure  10.  For FT-IR profiles at different instars RP/MCCM

    图  11  28 d龄期不同配比RP/MCCM的SEM微观结构

    Figure  11.  Microstructure of SEM with different ratios in 28 d instar period of RP/MCCM

    图  12  R0水泥净浆28 d BSE-EDS面扫结果

    Figure  12.  Surface sweep results of R0 cement net slurry 28 d BSE-EDS

    图  13  R30二元净浆体系28 d BSE-EDS面扫结果

    Figure  13.  28 d BSE-EDS face results of R30 binary clean slurry system

    图  14  R15F15三元净浆体系28 d BSE-EDS面扫结果

    Figure  14.  28 d BSE-EDS face results of R15F15 ternary slurry system

    图  15  R15F15配比28 d龄期TEM图像

    Figure  15.  R15F15 ratio TEM images at 28 d instar ages

    图  16  R0和R15F15多元水化模型

    Figure  16.  R0 and R15F15 multivariate hydration models

    图  17  水泥净浆体系生命周期系统边界

    Figure  17.  Life cycle system boundary of cement net slurry system

    图  18  RP/MCCM碳排放量对比分析

    Figure  18.  Comparative analysis of RP/MCCM carbon emissions

    图  19  RP/MCCM碳排放总量及每部分占比

    Figure  19.  The total carbon emissions and the proportion of each part of RP/MCCM

    表  1  化学成分检测

    Table  1.   chemical composition

    Chemical composition/wt% SiO2 Al2O3 Fe2O3 CaO MgO SO3 K2O NaO2 TiO2
    Cement 20.13 9.53 3.65 60.08 1.69 2.57 1.20 0.18 0.95
    RP 46.792 11.99 5.649 25.602 3.071 1.34 2.23 1.11 1.12
    FA 46.39 34.28 7.23 3.60 2.08 2.00 1.03 0.68 2.48
    下载: 导出CSV

    表  2  水泥净浆配合比设计

    Table  2.   Mix proportion design of cement paste

    Number Unit/g w/b
    Cement URP RP FA Water
    R0 450 0 0 0 135 0.3
    UR30 315 135 0 0 135 0.3
    R30 315 0 135 0 135 0.3
    R0F30 315 0 0 135 135 0.3
    R15F15 315 0 67.5 67.5 135 0.3
    Note: URP is Ungrounded recycled powder; R0 is cement paste, R15 is 15% of the recycled powder blending ratio after grinding, and F15 is 15% of the fly ash blending ratio.
    下载: 导出CSV

    表  3  原料提取阶段碳排放量计算结果

    Table  3.   Calculation results of carbon emission in the raw material extraction stage

    Mixture type Materials The mass of 1 m3 mixture/t The mass of each
    material in 1/(m3·t−1)
    Raw material production CEF/(kgCO2eq·t−1) Raw material CE/kg Raw materials
    for CE Ce/kg
    R0 Cement 2.1 1.83 735 1345.1 1345.1
    Water 0.29 0.15 0.04
    R30 Cement 2.1 1.28 785 941.5 941.6
    RP 0.54 0 0
    Water 0.29 0.15 0.1
    R0F30 Cement 2.1 1.28 735 941.5 960.5
    FA 0.55 34.5 18.94
    Water 0.29 0.15 0.1
    R15F15 Cement 2.1 1.28 735 941.5 950.9
    RP 0.27 0 0
    FA 0.19 34.5 9.3
    Water 0.29 0.15 0.1
    Notes: Carbon Emission Factor(CEF); Carbon Emissions(CE)
    下载: 导出CSV

    表  4  原料和混合物运输阶段的碳排放的计算结果

    Table  4.   Calculation results of carbon emissions during the transportation stage of raw materials and mixture

    Mixture
    type
    Materials
    The mass of 1 m3
    mixture /t
    The mass of each material in 1/(m3·t−1) Transport CEF/
    (kgCO2eq·t−1)
    Raw material transportation distance/km Transport CE/kg Raw material transportationCE Ct1/kg Net slurry transportation distance /km Mixed material transportationCE Ct2/kg
    R0 Cement 2.10 1.83 1.1 30 72.5 72.5 20.00 50.4
    Water 0.29 30 0.00
    R30 Cement 2.10 1.28 1.1 30 46.1 65.56 20.00 50.4
    RP 0.54 30 19.4
    Water 0.29 30 0.00
    R0F30 Cement 2.10 1.28 1.1 30 46.1 65.88 20.00 50.4
    FA 0.55 30 19.4
    Water 0.29 30 0.00
    R15F15 Cement 2.10 1.28 1.1 30 46.50 62.75 20.00 50.4
    RP 0.27 30 9.72
    FA 0.19 30 6.91
    Water 0.29 30 0.00
    下载: 导出CSV

    表  5  混合物生产阶段碳排放量的计算结果

    Table  5.   Calculation results of carbon emissions during the mixture production stage

    Mixture
    type
    Materials The mass
    of 1 m3
    mixture /t
    The mass of
    each material
    in 1/(m3·t−1)
    In the production
    process CEF/
    (kgCO2eq·t−1)
    Produce
    CE/kg
    After processing
    CEF/(kgCO2eq·t−1)
    After
    processing
    CE/kg
    The mixture
    produces the
    CE Cp/kg
    R0 Cement 2.1 1.83 1.1 2.89 / / 2.3
    Water 0.29
    R30 Cement 2.1 1.28 1.1 2.88 2.32 1.26 3.6
    RP 0.54
    Water 0.29
    R0F30 Cement 2.1 1.28 1.1 3.01 / / 2.4
    FA 0.55
    Water 0.29
    R15F15 Cement 2.1 1.28 1.1 2.77 2.32 0.63 2.9
    RP 0.27
    FA 0.19
    Water 0.29
    下载: 导出CSV

    表  6  建筑固废(CSW)处理碳排放量计算

    Table  6.   Calculation of carbon emissions from construction solid waste (CSW) treatment

    Mixture
    type
    CSW
    Materials
    The mass
    of 1 m3
    mixture /t
    The mass of
    each material
    in 1/(m3·t−1)
    Transport
    CEF/
    (kgCO2eq·t−1)
    CSW
    transport
    distance/km
    CSW
    transport
    CE /kg
    CSW-
    processed
    CEF/
    (kgCO2eq·t−1)
    Sewage
    treatment
    sCE/kg
    Avoid CSW
    landfilling
    CEF/(kgCO2eq·t−1)
    CSW
    landfill
    CE/kg
    Reductive
    CE R/kg
    R30 Cement 2.1 1.83 −1.1 0 −47.5 −7.1 4.1 −2.1 −1.13 −52.7
    RP 0.29 80
    Water 1.28 0
    R0F30 Cement 2.1 0.54 −1.1 0 −22.5 −7.1 3.9 −2.1 −1.15 −29.4
    FA 0.29 40
    Water 1.28 0
    R15F15 Cement 2.1 0.55 −1.1 0 −22.2 −7.1 3.3 −2.1 −0.97 −33.7
    RP 0.29 80
    FA 1.28 40
    Water 0.27 0
    下载: 导出CSV
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  • 收稿日期:  2024-01-25
  • 修回日期:  2024-03-21
  • 录用日期:  2024-04-17
  • 网络出版日期:  2024-05-23

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