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蒸养条件对电解锰渣水泥胶砂力学性能与微观形貌的影响

付勇 乔宏霞 冯琼 薛翠真 李言奇 贾振宇

付勇, 乔宏霞, 冯琼, 等. 蒸养条件对电解锰渣水泥胶砂力学性能与微观形貌的影响[J]. 复合材料学报, 2024, 42(0): 1-18.
引用本文: 付勇, 乔宏霞, 冯琼, 等. 蒸养条件对电解锰渣水泥胶砂力学性能与微观形貌的影响[J]. 复合材料学报, 2024, 42(0): 1-18.
FU Yong, QIAO Hongxia, FENG Qiong, et al. Effect of steam curing conditions on mechanical properties and microstructure of electrolytic manganese residue cement mortar[J]. Acta Materiae Compositae Sinica.
Citation: FU Yong, QIAO Hongxia, FENG Qiong, et al. Effect of steam curing conditions on mechanical properties and microstructure of electrolytic manganese residue cement mortar[J]. Acta Materiae Compositae Sinica.

蒸养条件对电解锰渣水泥胶砂力学性能与微观形貌的影响

基金项目: 国家自然科学基金(U21 A20150;52178216);国家自然科学基金青年基金(52008196;52108219);甘肃省科技计划资助(23 JRRA799; 23 JRRA813);重庆市科技局重点项目(cstc2021 jscx-jbgs0029)
详细信息
    通讯作者:

    乔宏霞,博士,教授,博士生导师,研究方向为固废资源化利用 E-mail: qiaohongxia@lut.edu.cn

  • 中图分类号: TU528

Effect of steam curing conditions on mechanical properties and microstructure of electrolytic manganese residue cement mortar

Funds: National Natural Science Foundation of China (U21 A20150; 52178216);Youth Fund of the National Natural Science Foundation of China (52008196; 52108219);Gansu Provincial Science and Technology Programme Grants (23 JRRA799; 23 JRRA813);Key projects of Chongqing Science and Technology Bureau(cstc2021 jscx-jbgs0029)
  • 摘要: 研究了不同煅烧温度(200℃和800℃)电解锰渣(EMR)火山灰活性及掺入0wt%、10wt%、20wt% EMR水泥胶砂在80℃蒸养7 h、7 d和标准养护3 d、28 d条件下力学性能、水化产物与孔隙特征分布。采用低场核磁共振技术、XRD定量表征及SEM微观形貌共同揭示了EMR对水泥胶砂的水化产物、孔径分布及孔隙率等影响规律,并探究了不同养护条件对EMR水泥胶砂水化进程的影响。结果表明:800℃煅烧EMR火山灰活性明显高于200℃煅烧火山灰活性,当800℃煅烧EMR替代量为10wt%时,初凝、终凝时间和标准稠度用水量分别为对照组的1.52、1.06和1.05倍,而蒸养7 h、7 d抗压强度分别高于标养3 d和28 d抗压强度,而抗折强度仅仅在蒸养7 d时高于对照组17.3%;纯水泥胶砂的水化产物主要为纤维状C-S-H和片状CH,而EMR水泥胶砂中由于硫酸盐含量较高,除了上述水化产物之外,在蒸养或标养条件下均可观察到石膏相与针棒状AFt的存在,标准养护28d时,CH、AFt和无定性含量分别为14.50%、11.75%和46.25%,与蒸养7 d衍射峰基本相似。另外,蒸养7 h与标准养护3 d对比孔隙率减少1.44%,蒸养7 d与标准养护28 d对比孔隙率减少0.06%。综上,蒸养可以提高800℃煅烧EMR火山灰活性,同时还可以加速EMR水泥胶砂的水化进程和细化其内部孔结构,进而提高了胶砂的力学性能。

     

  • 图  1  EMR的微观形貌

    Figure  1.  Microscopic morphology of EMR

    图  2  EMR的物相分析

    Figure  2.  Physical phase analysis by EMR

    图  3  OPC和EMR的粒径分布

    Figure  3.  Particle size distribution of OPC and EMR

    图  4  OPC和EMR的傅里叶红外光谱

    Figure  4.  Fourier infrared spectra of OPC and EMR

    图  5  纯水泥浆体与EMR水泥浆体工作性能:(a)凝结时间;(b)标准稠度用水量与体积安定性

    Figure  5.  Working performance of pure cement paste and EMR cement paste: (a) Setting time; (b) Water requirement of normal consistency and Soundness

    图  6  EMR水泥胶砂抗压强度:(a)10%;(b)20%

    Figure  6.  EMR cement mortar compressive strength: (a)10%; (b)20%

    图  7  EMR水泥胶砂抗折强度:(a)10%;(b)20%

    Figure  7.  EMR cement mortar flexural strength: (a)10%; (b)20%

    图  8  EMR200和EMR800 在40℃下固化8 d后的Frattini结果

    Figure  8.  Frattini results of EMR200 and EMR800 cured at 40℃ for 8 d

    图  9  EMR200和EMR800 的Frattini试验与SAI试验相关性

    Figure  9.  Correlation between Frattini test and SAI test for EMR200 and EMR800

    图  10  EMR200和EMR800在40℃的密封塑料瓶中养护1、3、7和28 d: (a)SL消耗试验,(b)SL消耗试验与Frattini试验相关性,(c) SL消耗试验与28 d SAI之间的相关性

    Figure  10.  EMR200 and EMR800 are cured in sealed plastic bottles at 40℃ for 1,3,7 and 28 days: (a)SL consumption test, (b)correlation between SL consumption test and Frattini test, (c)correlation between SL consumption test and 28 d SAI

    图  11  蒸养7 h后E-0组试件的微观形貌和EDS能谱

    Figure  11.  Microstructure and EDS energy spectrum of E-0 group specimens after steam curing for 7 h

    图  12  蒸养7 h 后E200-10组试件的微观形貌和EDS能谱

    Figure  12.  Microstructure and EDS energy spectrum of E200-10 group specimens after steam curing for 7 h

    图  13  蒸养7 h后E800-10组试件的微观形貌和EDS能谱

    Figure  13.  Microstructure and EDS energy spectrum of E800-10 group specimens after steam curing for 7 h

    图  14  蒸养7 d 后E-0组试件的微观形貌和EDS能谱

    Figure  14.  Microstructure and EDS energy spectrum of E-0 group specimens after steam curing for 7 d

    图  15  蒸养7 d 后E200-10组试件的微观形貌和EDS能谱

    Figure  15.  Microstructure and EDS energy spectrum of E200-0 group specimens after steam curing for 7 d

    图  16  蒸养7 d 后E800-10组试件的微观形貌和EDS能谱

    Figure  16.  Microstructure and EDS energy spectrum of E800-0 group specimens after steam curing for 7 d

    图  17  标养28 d纯水泥胶砂E-0的水化产物

    Figure  17.  Hydration products of 28 d standard curing pure cement mortar E-0

    图  18  标养28 d后E200-10的水化产物

    Figure  18.  Hydration products of E200-10 after 28 d of standard curin

    图  19  标养28 d后E800-10的水化产物

    Figure  19.  Hydration products of E800-10 after 28 d of standard curing

    图  20  不同养护条件下纯水泥胶砂与EMR水泥胶砂的XRD图谱

    Figure  20.  XRD patterns of pure cement mortar and EMR cement mortar under different curing conditions

    图  21  标准养护28 d条件下纯水泥胶砂与EMR水泥胶砂

    Figure  21.  Pure cement mortar and EMR cement mortar under standard curing for 28 days

    图  22  不同养护条件下纯水泥胶砂与EMR水泥胶砂T2图谱:(a)E-0;(b)E200-10;(c) E200-20;(d) E800-10;(e) E800-20;(f)孔隙率

    Figure  22.  T2 spectra of pure cement mortar and EMR cement mortar under different curing conditions: (a)E-0; (b)E200-10; (c) E200-20; (d) E800-10; (e)E800-20; (f) Porosity

    表  1  普通硅酸盐水泥(OPC)和电解锰渣(EMR)的化学组成

    Table  1.   Chemical composition of ordinary portland cement (OPC) and electrolytic manganese residue (EMR) wt%

    Material Al2O3 SiO2 Fe2O3 CaO SO3 MgO Other
    OPC 6.57 19.34 3.22 47.95 1.23 1.58 4.06
    EMR200 11.85 39.72 5.92 10.07 24.47 1.22 6.75
    EMR800 10.79 37.03 6.66 12.29 24.60 1.24 7.21
    下载: 导出CSV

    表  2  EMR水泥胶砂的配比与养护条件

    Table  2.   Proportioning and curing conditions of EMR cement mortar

    Sample OPC/ g EMR/ g Sand/ g Water/ g Curing condition
    E-0 450 0 1350 225 80℃ steam curing for 7 h (S7 h)
    80℃ steam curing for 7 d (S7 d)
    Standard curing 3 d (N3 d),
    Standard curing 28 d (N28 d)
    E200-10 405 45 1350 225
    E200-20 360 90 1350 225
    E800-10 405 45 1350 225
    E800-20 360 90 1350 225
    Notes: “E-0”indicates control specimen; E200-10, where “E200” indicates an EMR calcination temperature of 200℃, “10” indicates an EMR substitution rate of 10 %, and other similar specimens.
    下载: 导出CSV

    表  3  EMR200和EMR800在8 d时Frattini测试结果

    Table  3.   Frattini test results of EMR200 and EMR800 at 8 d

    Material [OH] mmol/L [CaO] mmol/L Theoretical max. [CaO] mmol/L [CaO] reduction%
    Sand 52.8 9.68 9.25 −4.4
    EMR200 58.9 6.34 7.97 20.45
    EMR800 54.0 6.30 8.79 28.3
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-01-24
  • 修回日期:  2024-02-28
  • 录用日期:  2024-03-07
  • 网络出版日期:  2024-04-16

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