纳米纤维对钢纤维-UHPC基体界面黏结性能的影响

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发布时间：2020-01-06 00:00:00

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纳米纤维对钢纤维-UHPC基体界面黏结性能的影响

Effect of nano-fiber on interfacial bonding performance of steel fiber-UHPC matrix

2024年第11期

钢纤维（SF）；超高性能混凝土（UHPC）；碳纳米管（CNTs）；碳酸钙晶须（CAS）；界面黏结性能；微观形貌

Steel fiber(SF); Ultra-high performance concrete(UHPC); Carbon nanotube(CNTs); Calcium carbonate crystal whisker(CAS); Interfacial bonding performance; Micro morphology

2024年第11期

10.19761/j.1000-4637.2024.11.060.06

吉世林

中铁十一局集团第三工程有限公司，湖北十堰 442000

吉世林

吉世林.纳米纤维对钢纤维-UHPC基体界面黏结性能的影响吉世林[J].混凝土与水泥制品,2024(11):60-64,69.

JI S L.Effect of nano-fiber on interfacial bonding performance of steel fiber-UHPC matrix[J].China Concrete and Cement Products,2024(11):60-64,69.

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摘要：研究了钢纤维（SF）埋置深度（5、10、15、20 mm）、碳纳米管（CNTs）掺量（0.1%、0.2%、0.3%、0.4%）、碳酸钙晶须（CAS）掺量（1%、2%、3%、4%）对SF-UHPC基体界面黏结性能的影响，并进行了微观机理分析。结果表明：随着SF埋置深度的增加，拉拔峰值荷载和SF-UHPC基体的拉拔能均呈增大趋势，但界面黏结强度呈降低趋势；CNTs的掺入虽降低了SF-UHPC基体的拉拔能，但适量CNTs可提升拉拔峰值荷载和SF-UHPC基体的界面黏结强度；掺入适量CAS可显著改善SF-UHPC基体的界面黏结性能；相较于CNTs，CAS对SF-UHPC基体界面黏结性能改善效果相对更好。 Abstract: The effects of the embedment depth(5, 10, 15, 20 mm) of steel fiber(SF), the content(0.1%, 0.2%, 0.3%, 0.4%) of carbon nanotube(CNTs) , and the content(1%, 2%, 3%, and 4%) of calcium carbonate crystal whisker(CAS) on the interfacial bonding performance of SF-UHPC matrix were investigated, and the micromechanisms analysis was conducted. The results show that, with the increase of the embedment depth of SF, the peak pull-out load and the pull-out energy of SF-UHPC matrix show an increasing trend, but the interfacial bonding strength shows a decreasing trend. Although the incorporation of CNTs reduces the pull-out energy of SF-UHPC matrix, the peak pull-out load and the interfacial bonding strength of SF-UHPC matrix can be improved with the appropriate content of CNTs. The incorporation of appropriate content of CAS can significantly improve the interfacial bonding performance of SF-UHPC matrix. Compared with CNTs, CAS has a relatively better improvement effect on the interfacial bonding performance of SF-UHPC matrix.

英文名 : Effect of nano-fiber on interfacial bonding performance of steel fiber-UHPC matrix

刊期 : 2024年第11期

关键词 : 钢纤维（SF）；超高性能混凝土（UHPC）；碳纳米管（CNTs）；碳酸钙晶须（CAS）；界面黏结性能；微观形貌

Key words : Steel fiber(SF); Ultra-high performance concrete(UHPC); Carbon nanotube(CNTs); Calcium carbonate crystal whisker(CAS); Interfacial bonding performance; Micro morphology

刊期 : 2024年第11期

DOI : 10.19761/j.1000-4637.2024.11.060.06

文章编号 :

基金项目 :

作者 : 吉世林

单位 : 中铁十一局集团第三工程有限公司，湖北十堰 442000

吉世林

吉世林.纳米纤维对钢纤维-UHPC基体界面黏结性能的影响吉世林[J].混凝土与水泥制品,2024(11):60-64,69.

JI S L.Effect of nano-fiber on interfacial bonding performance of steel fiber-UHPC matrix[J].China Concrete and Cement Products,2024(11):60-64,69.

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摘要

参数

结论

参考文献

引用本文

Abstract: The effects of the embedment depth(5, 10, 15, 20 mm) of steel fiber(SF), the content(0.1%, 0.2%, 0.3%, 0.4%) of carbon nanotube(CNTs) , and the content(1%, 2%, 3%, and 4%) of calcium carbonate crystal whisker(CAS) on the interfacial bonding performance of SF-UHPC matrix were investigated, and the micromechanisms analysis was conducted. The results show that, with the increase of the embedment depth of SF, the peak pull-out load and the pull-out energy of SF-UHPC matrix show an increasing trend, but the interfacial bonding strength shows a decreasing trend. Although the incorporation of CNTs reduces the pull-out energy of SF-UHPC matrix, the peak pull-out load and the interfacial bonding strength of SF-UHPC matrix can be improved with the appropriate content of CNTs. The incorporation of appropriate content of CAS can significantly improve the interfacial bonding performance of SF-UHPC matrix. Compared with CNTs, CAS has a relatively better improvement effect on the interfacial bonding performance of SF-UHPC matrix.

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纳米纤维对钢纤维-UHPC基体界面黏结性能的影响

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