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正交优化纤维聚合物修补防护砂浆配比及其综合性能实现机制

高乙博 罗健林 李治庆 张纪刚 高嵩 朱夏彤 朱敏 张立卿

高乙博, 罗健林, 李治庆, 等. 正交优化纤维聚合物修补防护砂浆配比及其综合性能实现机制[J]. 复合材料学报, 2023, 40(9): 5258-5275. doi: 10.13801/j.cnki.fhclxb.20221208.001
引用本文: 高乙博, 罗健林, 李治庆, 等. 正交优化纤维聚合物修补防护砂浆配比及其综合性能实现机制[J]. 复合材料学报, 2023, 40(9): 5258-5275. doi: 10.13801/j.cnki.fhclxb.20221208.001
GAO Yibo, LUO Jianlin, LI Zhiqing, et al. Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism[J]. Acta Materiae Compositae Sinica, 2023, 40(9): 5258-5275. doi: 10.13801/j.cnki.fhclxb.20221208.001
Citation: GAO Yibo, LUO Jianlin, LI Zhiqing, et al. Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism[J]. Acta Materiae Compositae Sinica, 2023, 40(9): 5258-5275. doi: 10.13801/j.cnki.fhclxb.20221208.001

正交优化纤维聚合物修补防护砂浆配比及其综合性能实现机制

doi: 10.13801/j.cnki.fhclxb.20221208.001
基金项目: 国家自然科学基金(51878364);中建八局横向合作项目(JM20191030;QUT-2022-FW-0192;QUT-2022-FW-0028);国家111计划与省高峰学科资助
详细信息
    通讯作者:

    罗健林,博士,教授,博士生导师,研究方向为复合材料与结构 E-mail: lawjanelim@qut.edu.cn

  • 中图分类号: TU58+9;TB333

Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism

Funds: National Natural Science Foundation of China (51878364); Projects from China Construction Eighth Division (JM20191030; QUT-2022-FW-0192; QUT-2022-FW-0028); The National “111” Project, and Gaofeng Discipline Project Funded by Shandong Province
  • 摘要: 双碳节约型经济大背景下,亟待开发面向复杂服役环境下基础设施修补用高性能修补防护砂浆。本文结合正交试验手段,综合探讨钢纤维(SF)掺量、乙烯-醋酸乙烯共聚物(EVA)乳胶粉掺量、高贝利特硫酸盐水泥和普通硅酸盐水泥比例对相应复配而成的纤维聚合物修补防护砂浆(SCPRM)的工作性能、力学性能、界面粘结性能和防水/抗渗耐久性能的影响规律。最优配比SCPRM的流动扩展度、凝结时间、抗折强度(ft)、抗压强度(fc)、14天粘结强度(fb14 d)、90天干燥收缩率、3天吸水率、接触角和氯离子渗透系数分别达226.0 mm、41 min/63 min(初凝/终凝时间)、5.2/17.1 MPa(ft1 d/ft28 d)、16.7/73.2 MPa(fc1 d/fc28 d)、3.61 MPa(fb14 d)、16.44×10−5、0.16%、70.04°和0.9486×10−12 m2·s−1。相应宏/微观结构显示SF分散均匀、EVA聚合物膜在水化产物中交替分布;FTIR揭示了复合胶凝体系水化特点与EVA对其水化影响机制。最终,制备出了一种综合性能优异,能够适应复杂服役环境的高性能修补防护砂浆。

     

  • 图  1  SCPRM制备工艺流程

    Figure  1.  Basic preparation process of SCPRM

    图  2  SCPRM的14天粘结强度(fb14 d)试验试件与试验过程(① 拉拔金属头;② 环氧树脂;③ 修补防护砂浆;④ 钢垫片;⑤ 旧混凝土基层)

    Figure  2.  Bond strength (fb14 d) at 14 days test specimens and procedure (① Pulling hook; ② Epoxy resin; ③ Repair mortar; ④ Steel spacer; ⑤ Old concrete substrate)

    图  3  不同组别SCPRM的流动扩展度均值、偏差及不同因素对流动扩展度的影响

    Figure  3.  Mean, deviation of flowability of varied groups SCPRM and the effect of OPC/HBSAC, wEVA and VSF on flowability

    图  4  不同组别SCPRM的凝结时间均值及不同因素对凝结时间的影响

    Figure  4.  Mean of setting time of varied groups SCPRM and the effect of OPC/HBSAC, wEVA and VSF on setting time

    图  5  不同组别SCPRM的抗折强度(ft)、抗压强度(fc)均值及不同因素对 ftfc的影响

    Figure  5.  Mean of ft, fc of varied groups SCPRM and the effect of OPC/HBSAC, wEVA and VSF on ft, fc

    图  6  不同组别SCPRM的fb14 d均值、偏差及不同因素对fb14 d的影响

    Figure  6.  Mean & deviation of fb14 d of varied groups SCPRM and the effect of OPC/HBSAC, wEVA and VSF on fb14 d

    图  7  不同组别SCPRM的干燥收缩均值及不同因素对干燥收缩的影响

    Figure  7.  Mean of drying shrinkage of varied groups SCPRM and the effect of OPC/HBSAC, wEVA and VSF on drying shrinkage

    图  8  不同组别SCPRM的吸水率均值 (a) 及不同因素对吸水率的影响 (b)

    Figure  8.  Mean of water absorption of varied groups SCPRM (a) and the effect of OPC/HBSAC, wEVA and VSF on water absorption (b)

    图  9  不同组别SCPRM的接触角均值、偏差及不同因素对接触角的影响

    Figure  9.  Mean & deviation of contact angle of varied groups SCPRM and the effect of OPC/HBSAC, wEVA and VSF on contact angle

    图  10  不同组别SCPRM的迁移系数(λ)均值、偏差及不同因素对λ的影响

    Figure  10.  Mean & deviation of transport coefficient (λ) of varied groups SCPRM and the effect of OPC/HBSAC, wEVA and VSF on λ

    图  11  通过喷涂AgNO3溶液显色法评价修补防护砂浆试件的氯离子侵蚀深度

    Figure  11.  Depth of chloride ion attack of varied groups repair mortar specimens through color comparison after spraying AgNO3 solution

    图  12  SCPRM的微观形貌

    Figure  12.  Microscopic morphologies of SCPRM

    AFt—Ettringite

    图  13  EVA和不同龄期时的修补防护砂浆的FTIR图谱

    Figure  13.  FTIR spectrum of EVA and repair mortars with different proportions at different curing ages

    表  1  普通硅酸盐水泥(OPC)与抗裂快凝快硬高贝利特硫铝酸盐水泥(HBSAC)的主要化学成分

    Table  1.   Main chemical composition of ordinary silicate cement (OPC) and high-belite sulfate aluminate cement (HBSAC) wt%

    Cement typeCaOSiO2Al2O3SO3Fe2O3MgOR2O
    P·O 42.551.4224.99 8.26 2.514.033.711.73
    HBSAC 52.541.9718.3316.6314.971.005.340.78
    下载: 导出CSV

    表  2  乙烯-醋酸乙烯共聚物(EVA)可再分散乳胶粉的主要理化特性

    Table  2.   Main physical and chemical properties of ethylene-vinyl acetate copolymer (EVA) re-dispersible emulsion powder

    Model of EVAAppearanceSolid content/
    wt%
    Ash content/
    wt%
    Glass transition
    temperature/℃
    Particle
    size/mm
    Stabilization
    system
    Wacker 5044NWhite powder99±110±200.4Polyvinyl alcohol
    下载: 导出CSV

    表  3  钢纤维(SF)主要性能指标

    Table  3.   Main performance indicators of steel fiber (SF)

    Length/mmDiameter/mmDensity/(g·cm−3)Tensile strength/MPaAppearance
    12-140.18-0.237.85≥3000Golden/Glossy
    下载: 导出CSV

    表  4  SF改性聚合物修补防护砂浆(SCPRM)正交试验因素与因素水平

    Table  4.   Factors and factor levels of orthogonal test for SF modified polymer repair protect mortar (SCPRM)

    Test factorLevel of the factorsItem No.
    OPC∶HBSAC1∶0A1
    0.7∶0.3A2
    0.5∶0.5A3
    EVA dosing wEVA/wt%0B1
    8B2
    15B3
    SF dosing VSF/vol%0C1
    1C2
    2C3
    下载: 导出CSV

    表  5  9组SCPRM正交试验材料配比

    Table  5.   Orthogonal mix ratio of 9 groups of SCPRM (kg/m3)

    Group No.(C+EVA+FA)∶WOPCHBSACSFAEVASFWSupDA
    SCPRM1 0.25 900 0 1125 112.5 0 0 253.1 4.1 4
    SCPRM2 72 156 271.1 4.3
    SCPRM3 135 78 286.9 4.6
    SCPRM4 630 270 0 156 253.1 4.1
    SCPRM5 72 78 271.1 4.3
    SCPRM6 135 0 286.9 4.6
    SCPRM7 450 450 0 78 253.1 4.1
    SCPRM8 72 0 271.1 4.3
    SCPRM9 135 156 286.9 4.6
    Notes: C—Cement; FA—Fly ash; S—Quartz sand; W—Water; Sup—Superplasticizer; DA—Defoamer.
    下载: 导出CSV

    表  6  FTIR试验中3组修补防护砂浆(CPRM)的材料配比

    Table  6.   Mix ratio of 3 groups repair protect mortar (CPRM) for FTIR test (kg/m3)

    Group No.(C+EVA+FA)∶WOPCHBSACSFAEVAWSupDA
    CPRM10.25900 01125112.5 0253.14.14
    CPRM2630270 0253.14.1
    CPRM363027072271.14.3
    下载: 导出CSV

    表  7  SCPRM流动扩展度极差分析结果

    Table  7.   Range analysis results of flowability of SCPRM

    Analysis resultOPC/HBSACEVASF
    R/mm60141.635.7
    Degree of influencewEVA>OPC∶HBSAC>VSF
    Note: R in Table 7 is the range of flowability, and R in the range analysis tables below are the range of the corresponding performance respectively.
    下载: 导出CSV

    表  8  SCPRM初凝时间极差分析结果

    Table  8.   Range analysis results of initial setting time of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA3B1C1
    R/min12431083483
    Degree of influenceA(OPC∶HBSAC)>B(wEVA)>C(VSF)
    下载: 导出CSV

    表  9  SCPRM终凝时间极差分析结果

    Table  9.   Range analysis results of final setting time of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA3B1C1
    R/min17861638864
    Degree of influenceA(OPC∶HBSAC)>B(wEVA)>C(VSF)
    下载: 导出CSV

    表  10  SCPRM的1天抗折强度(ft1 d)极差分析结果

    Table  10.   Range analysis results of flexural strength at 1 day (ft1 d) of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA3B1C3
    R/MPa14.412.03.8
    Degree of influenceA(OPC∶HBSAC)>B(wEVA)>C(VSF)
    下载: 导出CSV

    表  11  SCPRM的1天抗压强度(fc1 d)极差分析结果

    Table  11.   Range analysis results of compressive strength at 1 day (fc1 d) of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA3B1C3
    R/MPa42.249.63.8
    Degree of influenceB(wEVA)>A(OPC∶HBSAC)>C(VSF)
    下载: 导出CSV

    表  12  SCPRM的28天抗折强度ft28 d极差分析结果

    Table  12.   Range analysis results of flexural strength at 28 days (ft28 d) of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA2B3C3
    R/MPa3.88.93.8
    Degree of influenceB(wEVA)>A(OPC∶HBSAC)>C(VSF)
    下载: 导出CSV

    表  13  SCPRM的28天抗压强度(fc28 d)极差分析结果

    Table  13.   Range analysis results of compressive strength at 28 days (fc28 d) of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA2B1C2
    R/MPa22.484.524.7
    Degree of influenceB(wEVA)>C(VSF)>A(OPC∶HBSAC)
    下载: 导出CSV

    表  14  SCPRM在14天龄期时的fb14 d极差分析结果

    Table  14.   Range analysis results of fb14 d of SCPRM at 14 days

    Analysis resultOPC/HBSACEVASF
    Optimal levelA2B2C2
    R/MPa1.032.480.93
    Degree of influenceB(wEVA)>A(OPC∶HBSAC)>C(VSF)
    下载: 导出CSV

    表  15  SCPRM的90天干燥收缩极差分析结果

    Table  15.   Range analysis results of drying shrinkage at 90 days of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA2B2C1
    R/10−560.6533.9621.78
    Degree of influenceA(OPC∶HBSAC)>B(wEVA)>C(VSF)
    下载: 导出CSV

    表  16  SCPRM的72 h吸水率极差分析结果

    Table  16.   Range analysis results of water absorption rate at 72 h of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA2B3C2
    R/%0.691.440.24
    Degree of influenceB(wEVA)>A(OPC∶HBSAC)>C(VSF)
    下载: 导出CSV

    表  17  SCPRM的接触角极差分析结果

    Table  17.   Range analysis results of contact angle of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA2B3C2
    R/(°)8.4975.067.68
    Degree of influenceB(wEVA)>A(OPC∶HBSAC)>C(VSF)
    下载: 导出CSV

    表  18  SCPRM的λ极差分析结果

    Table  18.   Range analysis results of λ of SCPRM

    Analysis resultOPC/HBSACEVASF
    Optimal levelA3B2C1
    R/(m2·s−1)5.2003×10−122.9155×10−122.0152×10−12
    Degree of influenceA(OPC∶HBSAC)>B(wEVA)>C(VSF)
    下载: 导出CSV

    表  19  SCPRM不同性能对应的最佳配比

    Table  19.   Optimal ratios corresponding to different properties of SCPRM

    PropertySetting timeft1 dfc1 dft28 dfc28 dfb14 dDrying
    shrinkage
    Water absorption
    rate
    Contact
    angle
    λ
    Optimal ratioA3B1C1A3B1C3A3B1C3A2B3C3A2B1C2A2B2C2A2B2C1A2B3C2A2B3C2A3B2C1
    下载: 导出CSV

    表  20  不同类型修补防护砂浆综合性能对比分析

    Table  20.   Comparison of the comprehensive performances of different types repair protect mortars

    Type of repair protect mortarFlowabi-
    lity/mm
    Setting time/minft1 d/ft28 d
    /MPa
    fc1 d/fc28 d/MPafb 14 d
    /MPa
    Drying shrinkage/10−5Water absorption rate/%λ/(10−12 m2·s−1)
    SCPRM5226635.2/17.116.7/73.23.6116.440.160.9486
    Basalt fiber reinforced geopolymer repair protect mortar[59]220235.2/10.527.0/59.21.3550
    Polypropylene fiber reinforced geopolymer repair protect mortar[59]190294.8/9.622.0/56.41.4510
    Acrylic polymer repair protect mortar[60]12.0 (3 d)/17.043.4 (3 d)/62.32.87.05.25
    MPCRM[61]1314.4/30.540.0/352.84.0
    Ultra-early-strength MPCRM[62]200 76.4 (3 h)/9.830 (3 h)/50.48.8 (Flexural-tensile strength)
    Note: MPCRM—Magnesium phosphate cement repair mortar.
    下载: 导出CSV

    表  21  图12(a)中点#1 EDS点扫描结果

    Table  21.   EDS point scan results for point #1 in Fig. 12(a) at%

    NumberCOSiSCaMo
    #112.357.12.18.115.12.3
    下载: 导出CSV
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  • 收稿日期:  2022-10-13
  • 修回日期:  2022-11-16
  • 录用日期:  2022-11-26
  • 网络出版日期:  2022-12-09
  • 刊出日期:  2023-09-15

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