纳米纤维素对混凝土性能的影响研究
Study on the Influence of Nano Cellulose on the Performance of Concrete
关键词：
纳米纤维素；混凝土；水化热；力学性能；耐久性能
Key words：
Nano cellulose; Concrete; Hydration heat; Mechanical property; Durability
刊期：
2022年第11期
DOI：
10.19761/j.1000-4637.2022.11.054.05
文章编号：
基金项目：
国家自然科学基金项目（52078282）；山东省重点研发计划（重大科技创新工程）项目（2021CXGC011204）。
作者：
刘 帅1，刘巧玲1，2，杨立华1，2，聂苗苗1，张 姣1
单位：
1.山东建筑大学 土木工程学院，山东 济南 250101；2.山东建筑大学工程鉴定加固研究院有限 公司，山东 济南 250101
摘要
摘 要：研究了纳米纤维素（CNFs）对混凝土流变性能、水化热、力学性能、抗氯离子渗透性能和抗冻性能的影响，并采用扫描电子显微镜（SEM）观察了混凝土基体的微观结构。结果表明：CNFs的掺入增大了水泥浆体的屈服应力和塑性黏度，抑制了水泥的早期水化，促进了水泥的后期水化；随着CNFs掺量的增加，混凝土的抗压、抗折强度增大；CNFs的掺入改善了基体的微观结构，提高了混凝土的抗氯离子渗透性能和抗冻性能。
Abstract: The effects of nano cellulose(CNFs) on the rheology, heat of hydration, mechanical properties, resistance to chloride ion penetration and frost resistance of concrete were studied, and the microstructure of the matrix was observed by scanning electron microscope(SEM). The results show that the incorporation of CNFs increases the yield stress and plastic viscosity of cement paste, inhibits the early hydration of cement, and promotes the later hydration of cement. With the increase of CNFs content, the compressive strength and flexural strength of concrete increase. The incorporation of CNFs improves the microstructure of the matrix, so as to improve the resistance to chloride ion penetration and frost resistance of concrete.
结论
（1）CNFs的掺入增大了浆体的屈服应力和塑性黏度，抑制了胶凝材料早期（12 h前）的水化，但促进了后期水化。
（2）随着CNFs掺量的增加，混凝土的抗压、抗折强度增大，抗氯离子渗透性能和抗冻性能提高。
（3）SEM结果表明，CNFs可显著改善基体的微观结构，提高基体密实度。
参考文献
[1] 张希黔,黄乐鹏,康明.现代混凝土新技术发展综述[J].施工技术,2016,45(12):1-9.
[2] 黄丽媛.植物纤维增强水泥基复合材料的研究[D].重庆:西南大学,2019.
[3] HOYOS C G,CRISTIA E,V?魣ZQUEZ A.Effect of Cellulose Microcrystalline Particles on Properties of Cement based Composites[J].Materials and Design,2013,51:810-818.
[4] BALEA A,FUENTE E,BLANCO A,et al.Nanocelluloses: Natural-based Materials for Fiber-reinforced Cement Composites.A Critical Review[J].Polymers,2019,11(3):11030518.
[5] JIAO L,SU M,CHEN L,et al.Natural Cellulose Nanofibres as Sustainable Enhancers in Construction Cement[J].Plos One,2016,11(12):1-13.
[6] PETERS S J,RUSHING T S,LANDIS E N,et al.Cummins, Nanocellulose and Microcellulosefibres for Concrete[J].Transportation Research Record: Journal of the Transportation Research Board,2010,2142:25-28.
[7] HISSEINE O A,WILSON W,SORELLI L,et al.Nanocellulose for Improved Concrete Performance: A Macro-to-micro Investigation for Disclosing the Effects of Cellulose Filaments on Strength of Cement Systems[J].Construction and Building Materials,2019,206: 84-96.
[8] KAMASAMUDRAM K S,ASHRAF W,LANDIS E N.Cellulose Nanofibrils with and Without Nanosilica for the Performance Enhancement of Portland Cement Systems[J].Construction and Building Materials,2021,285:121547.
[9] 闫国新,孙红霞,张晓磊,等.植物纳米纤维混凝土力学性能试验研究[J].混凝土,2020(8):98-100.
[10] DANUTA B H,MONIKA S C,MONIKA J H,et al.Effect of Cellulose Nanofibrils and Nanocrystals on Physical Properties of Concrete[J].Construction and Building Materials,2019,223:1-11.
[11] MONTES F,FU T F,YOUNGBLOOD J P,et al.Rheological Impact of Using Cellulose Nanocrystals (CNC) in Cement Pastes[J].Construction and Building Materials,2020,235:117497.
[12] JIAO L,SU M,CHEN L,et al.Natural Cellulose Nanofibers as Sustainable Enhancers in Construction Cement[J].Plos One,2016,11(12):1-13.
引用本文
刘帅,刘巧玲,杨立华,等.纳米纤维素对混凝土性能的影响研究[J].混凝土与水泥制品,2022(11):54-58.
LIU S,LIU Q L,YANG L H,et al.Study on the Influence of Nano Cellulose on the Performance of Concrete[J].China Concrete and Cement Products,2022(11):54-58.
上一个： 改性玄武岩纤维对矿渣水泥砂浆性能的影响
下一个： 岩棉纤维超轻泡沫混凝土的制备及性能研究
相关文件