+高级检索
首页 > 过刊浏览>2021年第24卷第1期 >31-39. DOI:103969/j.issn.1007 9629202101005
PDF HTML阅读 XML下载 导出引用 引用提醒
无碱速凝剂对硅酸盐水泥早期水化的影响
作者:
基金项目:

国家重点研发计划(2020YFC1909900)；国家自然科学基金杰出青年基金资助项目(51825203)；中国铁路总公司科技研究开发计划课题(N2018G030)；江苏省第十五批六大人才高峰项目(JZ 058)


Effect of Alkali Free Accelerators on Early Age Hydration of Portland Cement
Author:
  • 摘要
    • | |
  • 访问统计
    • |
  • 参考文献 [34]
    • |
  • 相似文献 [20]
    • |
  • 引证文献
    • | |
  • 文章评论
    摘要:

    从早期硬化强度发展、水化离子溶出规律、水化放热行为以及水化物相和微观形貌层次阐述了液体无碱速凝剂对硅酸盐水泥早期水化的影响.结果表明：液体无碱速凝剂通过速凝阶段针棒状钙矾石的迅速形成而使得硅酸盐水泥初始水化放热显著提高；氟离子的引进促进了速凝阶段C3S的快速溶解水化并形成CSH凝胶，明显改善了无碱速凝剂的速凝作用效果及其与减水剂的适应性，但显著降低了水化24h的硬化体强度，原因是氟离子在水化加速阶段消耗钙离子而形成了片状CaF2产物，在吸附插层作用下对CSH凝胶产生包裹抑制作用，从而明显延缓了水泥水化过程.

    Abstract:

    Early age hydration behavior of Portland cement containing liquid alkali free accelerators was studied by early age hydrated strength development, released ionic concentration, isothermal calorimetry, hydration phase analysis and microstructure analysis. The results show that the initial hydration heat rate of Portland cement containing liquid alkali free accelerators rises sharply due to the fast crystallization of massive ettringite prisms. The fluoride present in alkali free accelerators promotes C3S dissolution and C S H gel generation, leading to better quick setting effect and improved compatibility with superplasticizers. However, the hardening strength of cement paste hydrated 24h is declined notably with fluorine containing alkali free accelerator, mainly due to the crystallization of plate like CaF2, which absorbs and intercalates into the C S H gel structure and induces delayed hydration process.

    参考文献
    [1]陈文耀.混凝土外加剂在水工混凝土中的应用[J].水利水电施工,2011(4)：81 83.
    CHEN Wenyao.Application of concrete admixtures in hydraulic concrete[J].Construction of Water Resources and Electric Power,2011(4)：81 83.(in Chinese)
    [2]张仙保.锚杆喷射混凝土技术在矿山竖井工程中的应用[J].煤炭技术,2007(9)：89 91.
    ZHANG Xianbao.Application of bolting and shotcreting technology in shaft project[J].Coal Technology,2007(9)：89 91.(in Chinese)
    [3]BELIE N D,GROSSE C U,KURZ J,et al.Ultrasound monitoring of the influence of different accelerating admixtures and cement types for shotcrete on setting and hardening behavior[J].Cement and Concrete Research,2005,35(11)：2087 2094.
    [4]曾鲁平,王伟,张小磊,等.液体无碱速凝剂的研究现状及适应性机理研究[J].建材发展导向,2019,16：11 14.
    ZENG Luping,WANG Wei,ZHANG Xiaolei,et al.Research status and cement compatibility mechanism of alkali free liquid accelerators for shotcrete[J].Development Guidance of Building Material,2019,16：11 14.(in Chinese)
    [5]舒豆豆.一种含促凝早强剂有机胺类物质的无碱速凝剂：CN107857501[P].2018 03 30.
    SHU Doudou.A kind of alkali free accelerator containing early strength agent and organic amine：CN107857501[P].2018 03 30.(in Chinese)
    [6]陈镇杉.一种喷射混凝土用低碱液体速凝剂及其制备方法:CN107601948[P].2018 01 19.
    CHEN Zhenshan.A kind of low alkaline accelerator and its preparation method：CN107601948[P].2018 01 19.(in Chinese)
    [7]MALTESE C,PISTOLESI C,BRAVO A,et al.A case history：Effect of moisture on the setting behaviour of a Portland cement reacting with an alkali free accelerator[J].Cement and Concrete Research,2007,37(6)：856 865.
    [8]马召林.液体无碱速凝剂的研制及应用研究[D].郑州：郑州大学,2014.
    MA Zhaolin.Development and application of liquid alkali free accelerator[D].Zhenzhou：Zhenzhou University,2014.(in Chinese)
    [9]SALVADOR R P,CAVALARO S H P,CINCOTTO M A,et al.Parameters controlling early age hydration of cement pastes containing accelerators for sprayed concrete[J].Cement and Concrete Research,2016,89：230 248.
    [10]袁润章.胶凝材料学[M].北京:中国建筑工业出版社,1980:93 106.
    YUAN Runzhang.Cementitious materials science[M].Beijing：China Building Industry Press,1980：93 106.(in Chinese)
    [11]XU Q,STARK J.Early hydration of ordinary Portland cement with an alkaline accelerator[J].Advance Cement Research,2005,17：1 8.
    [12]郭文康.无碱速凝剂的促凝机理及应用试验研究[D].武汉：长江科学院,2013.
    GUO Wenkang.Experimental study on the mechanism and application of alkali free liquid concrete accelerators[D].Wuhan:Yangtze River Science Research Institute,2013.(in Chinese)
    [13]SALVADOR R P,CAVALARO S H P,SEGURA I,et al.Early age hydration of cement pastes with alkaline and alkali free accelerators for sprayed concrete[J].Construction and Building Materials,2016,111：389 398.
    [14]QUENNOZ A,SCRIVENER K L.Interactions between alite and C3A gypsum hydration in model cements[J].Cement and Concrete Research,2013,44：46 54.
    [15]谭洪波.无碱液态速凝剂对水泥水化促凝机理的研究[C]//中国化学外加剂及矿物外加剂研究与应用新进展：2016年科隆杯优秀论文汇编.北京：中国硅酸盐学会,2016:3.
    TAN Hongbo.Coagulation effect of liquid alkali free accelerator on cement hydration[C]//New Progress in Research and Application of Chemical and Mineral Additives in China：Collection of Excellent Papers of Kelong Cup.Beijing：China Ceramic Society,2016:3.(in Chinese)
    [16]ZINGG A,WINNEFELD F,HOLZER L,et al.Interaction ofpolycarboxylate based superplasticizers with cements containing different C3A amounts[J].Cement and Concrete Composite,2009,31：153 162.
    [17]STEFANONI M,MALTESE C,PISTOLESI C,et al.Effects of calcium carbonate based aggregates on alkali free accelerators[J].Advance Cement Research,2013,26(4)：194 204.
    [18]SALVADOR R P,CAVALARO S H P,CANO M,et al.Influence of spraying on the early hydration of accelerated cement pastes[J].Cement and Concrete Research,2016,88：7 19
    [19]戴晓栋,袁定辉,刘向阳,等.降低机制砂湿喷混凝土回弹率技术研究[J].现代隧道技术,2018,55(增刊2):236 239.
    DAI Xiaodong,YUAN Dinghui,LIU Xiangyang,et al.Research on reducing reboud rate of wet sprayed concrete with machine made sand[J].Modern Tunnelling Technology,2018,55(Suppl 2):236 239.(in Chinese)
    [20]MALTESE C,PISTOLESI C,BRAVO A,et al.Effects of setting regulators on the efficiency of an inorganic acid based alkali free accelerator reacting with a Portland cement[J].Cement and Concrete Research,2007：37(4)：528 536.
    [21]SALVADOR R P,CAVALARO S H P,MONTE R.Relation between chemical processes and mechanical properties of sprayed cementitious matrices containing accelerators[J].Cement and Concrete Composite,2017,79：117 132.
    [22]JOISEL L.Admixtures for cement[M]．Soisy,France：Published by the Author,1973.
    [23]彭家惠,楼宗汉.钙矾石形成机理的研究[J].硅酸盐学报，2000，28(6):511 515.
    （下转第44页）
    引证文献
引用本文

曾鲁平,乔敏,王伟,冉千平,洪锦祥.无碱速凝剂对硅酸盐水泥早期水化的影响[J].建筑材料学报,2021,24(1):31-39

复制
分享
文章指标
  • 点击次数:532
  • 下载次数: 56
  • HTML阅读次数: 0
  • 引用次数: 0
历史
  • 收稿日期:2019-09-09
  • 最后修改日期:2019-10-28
  • 在线发布日期: 2021-03-09
文章二维码
您是第 2051491 位访问者
主管单位 ：教育部
主办单位 ：同济大学
地址 ：上海市四平路1239号同济大学综合楼1701室
电话 ：021-65981597 传真 ：021-65981597
建筑材料学报 ® 2025 版权所有