+高级检索
首页 > 过刊浏览>2021年第24卷第4期 >694-700. DOI:103969/j.issn.1007 9629202104004
PDF HTML阅读 XML下载 导出引用 引用提醒
蒸汽养护条件下纳米TiO2对粉煤灰水泥体系早期力学性能的影响
作者:
基金项目:

“十三五”国家重点研发计划项目（2016YFC0701003 05）；湖北省教育厅科学技术研究计划项目（Q20191706）


Influence of Nano TiO2 on the Early Mechanical Properties of Fly Ash Cement System under Steam Curing
Author:
  • 摘要
    • | |
  • 访问统计
    • |
  • 参考文献 [24]
    • |
  • 相似文献 [20]
    • | | |
  • 文章评论
    摘要:

    研究了蒸汽养护条件下纳米TiO2（NT）对粉煤灰水泥体系早期力学性能的影响,并探索了其影响机制.结果表明：NT的掺入可显著提高粉煤灰水泥体系的早期抗压强度,其最佳掺量为3%;NT的掺入显著提高了水泥熟料的水化程度及粉煤灰的二次水化程度,增加了水化硅酸钙（CSH）凝胶的聚合度;NT的掺入降低了粉煤灰水泥体系的孔隙率及总孔容,改善了其孔径分布,从而提高了粉煤灰水泥砂浆的密实度及早期抗压强度.

    Abstract:

    The influence of nano TiO2(NT) on the early mechanical properties of fly ash cement system was investigated, and the mechanism was explored. The results show that the incorporation of NT can considerably improve the early compressive strength of the fly ash cement system and the optimum content of NT is 3%. In addition, NT can significantly enhance the hydration degree of cement clinker and the secondary hydration degree of fly ash, it can increase the polymerization degree of calcium silicate hydrate（C S H）gels, decrease the porosity and total pore volume, improve the pore size distribution, and thus increase the compactness and early compressive strength of the fly ash cement mortars.

    参考文献
    [1]WANG A Q,ZHANG C Z,SUN W.Fly ash effects:Ⅰ.The morphological effect of fly ash[J].Cement and Concrete Research,2004,33(12):2023 2029.
    [2]WANG A Q,ZHANG C Z,SUN W.Fly ash effects:Ⅱ.The active effect of fly ash[J].Cement and Concrete Research,2004,34(11):2057 2060.
    [3]WANG A Q,ZHANG C Z,SUN W.Fly ash effects:Ⅲ.The microaggregate effect of fly ash[J].Cement and Concrete Research,2004,34(11):2061 2066.
    [4]SARASWATHY V,MURALIDHARAN S,THANGAVEL K,et al.Influence of activated fly ash on corrosion resistance and strength of concrete[J].Cement and Concrete Composites,2003,25(7):673 680.
    [5]张小伟,肖瑞敏,张雄.粉煤灰矿粉水泥胶凝体系的高效复合早强剂研制[J].建筑材料学报,2012,15(2):249 254.
    ZHANG Xiaowei,XIAO Ruimin,ZHANG Xiong.Preparation of high performance composites strength accelerator for cement containing fly ash and ground granulated blast furnace slag[J].Journal of Building Materials,2012,15(2):249 254.(in Chinese)
    [6]HOU P K,KAWASHIMA S,WANG K J,et al.Effects of colloidal nanosilica on rheological and mechanical properties of fly ash cement mortar[J].Cement and Concrete Composites,2013,35(1):12 22.
    [7]CHEN J,KOU S C,POON C S.Hydration and properties of nano TiO2 blended cement composites[J].Cement and Concrete Research,2012,34(5):642 649.
    [8]MA B G,LI H N,LI X G,et al.Influence of nano TiO2 on physical and hydration characteristics of fly ash cement systems[J].Construction and Building Materials,2016,122:242 253.
    [9]钱文勋,蔡跃波,张燕迟,等.养护温度对高掺量粉煤灰水泥浆体水化的影响[J].建筑材料学报,2013,16(1):33 36.
    QIAN Wenxun,CAI Yuebo,ZHANG Yanchi,et al.Influence of curing temperature on hydration of cement paste adding high volume of fly ash[J].Journal of Building Materials,2013,16(1):33 36.(in Chinese)
    [10]吴中伟.混凝土科学技术近期发展方向的探讨[J].硅酸盐学报,1979,7(3):262 270.
    WU Zhongwei.An approach to the recent trends of concrete science and technology[J].Journal of Chinese Ceramic Society,1979,7(3):262 270(in Chinese).
    [11]ZHANG B L,TAN H B,MA B G,et al.Preparation and application of fine grinded cement in cement based material[J].Construction and Building Materials,2017,157:34 41.
    [12]SHAIKH F U A,SUPIT S W M,SARKER P K.A study on the effect of nano silica on compressive strength of high volume fly ash mortars and concretes[J].Materials and Design,2014,60:433 442.
    [13]LARSEN G.Microscopic point measuring:A quantitative petrographic method of determining the Ca(OH)2 content of the cement paste of concrete[J].Magazine of Concrete Research,1961,13:71 76.
    [14]JAIN J,NEITHALATH N.Analysis of calcium leaching behavior of plain and modified cement pastes in pure water[J].Cement and Concrete Composites,2009,31(3):176 185.
    [15]廉慧珍,童良,陈恩义.建筑材料物相研究基础[M].北京:清华大学出版社,1996:100 101.
    LIAN Huizhen,TONG Liang,CHEN Enyi.Phase research foundation of building materials[M].Beijing:Tsinghua University press,1996:100 101.(in Chinese)
    [16]ANDERSEN M D,JAKOBSEN H J,SKIBSTED J.Characterization of white Portland cement hydration and the C S H structure in the presence of sodium aluminate by 27Al and 29Si MAS NMR spectroscopy[J].Cement and Concrete Research,2004,34(5):857 868.
    [17]LOVE C A,RICHARDSON I G,BROUGH A R.Composition and structure of C S H in white Portland cement 20% metakaolin pastes hydrated at 25℃[J].Cement and Concrete Research,2007,37(2):109 117.
    [18]RICHARDSON I G,GROVES G W.The structure of the calcium silicate hydrate phases present in hardened pastes of white Portland cement/blast furnace slag blends[J].Journal of Material Science,1997,32(18):4793 4802.
    [19]WANG L,HE Z,ZHANG B,et al.Quantitative analysis of fly ash cement hydration by 29Si MAS NMR[J].Journal of Chinese Ceramic Society,2010,38(11):2212 2216.
    [20]PALOMO A,FERNANDEZ JIMENEZ A,KOVALCHUK G,et al.Opc fly ash cementitious systems:Study of gel binders produced during alkaline hydration[J].Journal of Material Science,2007:42(9):2958 2966.
    引证文献
    网友评论
    网友评论
    分享到微博
    发 布
引用本文

梅军鹏,徐智东,李海南,梁宇佳.蒸汽养护条件下纳米TiO2对粉煤灰水泥体系早期力学性能的影响[J].建筑材料学报,2021,24(4):694-700

复制
分享
文章指标
  • 点击次数:331
  • 下载次数: 77
  • HTML阅读次数: 0
  • 引用次数: 0
历史
  • 收稿日期:2020-04-20
  • 最后修改日期:2020-05-31
  • 在线发布日期: 2021-09-06
文章二维码
您是第 2054083 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