SF-PE纤维混杂水泥基材料抗折性能研究
Study on flexural performance of SF-PE hybrid fiber reinforced cementitious materials
关键词：
纤维增强水泥基复合材料（FCC）；聚乙烯（PE）纤维；钢纤维（SF）；抗折性能；弯曲韧性
Key words：
Fiber reinforced cementitious composites(FCC); Polyethylene(PE) fiber; Steel fiber(SF); Flexural performance; Bending toughness
刊期：
2025年第6期
DOI：
10.19761/j.1000-4637.2025.06.042.06
文章编号：
基金项目：
山东省自然科学基金项目（ZR2023QE260）。
作者：
姜 超1，朱学军1，陈文文2，刘文胜1，宫树信1，郑元武1，张 雷2，李 阳1
单位：
1.中国建筑第五工程局有限公司，山东 济南 250101；2.济南大学 土木建筑学院，山东 济南 250022
摘要
摘 要：采用聚乙烯（PE）纤维和钢纤维（SF）制备了纤维增强水泥基复合材料（FCC），其中，固定PE纤维体积掺量为1%，研究了SF长度（6、10、13 mm）和体积掺量（0、0.3%、0.6%、0.9%）对FCC抗折性能的影响。结果表明：各组FCC试件的抗折破坏形式均为主裂缝破坏，其中，混杂纤维FCC试件的主裂缝宽度大于单掺PE纤维的FCC试件（JZ组），但主裂缝周围的细密裂缝数量较JZ组少；SF的掺入有效提升了FCC试件的抗折性能，相较于JZ组，混杂纤维FCC试件的开裂挠度最大提升了220.5%，峰值挠度最大提升了45.0%，开裂应力最大提升了251.3%，抗折强度最大提升了68.0%；随着SF掺量和长度的增加，混杂纤维FCC试件的弯曲韧性系数呈增大趋势，且当SF的长度为13 mm、掺量为0.9%时，FCC试件的弯曲韧性系数相对最大，较JZ组提升了27.66%。
Abstract: Fiber reinforced cementitious composites(FCC) were prepared with polyethylene(PE) fiber and steel fiber(SF), in which the volume content of PE fiber was fixed at 1%. Then the effects of the length(6, 10, 13 mm) and the volume content(0, 0.3%, 0.6%, 0.9%) of SF on the flexural performance of FCC were investigated. The results show that the flexural failure modes of FCC specimens are all in the form of main crack damage, and the main crack width of FCC specimens with hybrid fiber is larger than that of FCC specimens with PE fiber(JZ group), however, the number of fine cracks around the main crack is less than that of the JZ group. The incorporation of SF effectively improves the flexural performance of the FCC specimens. Compared with JZ group, the cracking deflection of FCC specimens with hybrid fiber is increased by a maximum of 220.5%, the peak deflection is increased by a maximum of 45.0%, the cracking stress is increased by a maximum of 251.3%, and the flexural strength is increased by a maximum of 68.0%. With the increase of the content and the length of SF, the bending toughness coefficient of FCC specimens with hybrid fiber shows an increasing trend, and the bending toughness coefficient of FCC specimens is relatively the largest when the length of SF is 13 mm and the content of SF is 0.9%, which is improved by 27.66% compared with that of JZ group.
结论
（1）FCC试件的抗折破坏形式均为主裂缝破坏，其中，JZ组试件主裂缝周围的细密裂缝数量相对最多且分布范围相对最广，混杂纤维FCC试件的主裂缝宽度大于JZ组试件，但主裂缝周围的细密裂缝数量较少。
（2）与JZ组相比，SF的掺入提高了FCC试件的抗折性能，其中，开裂挠度最大提高了220.5%，峰值挠度最大提高了45.0%，开裂应力最大提高了251.3%，抗折强度最大提高了68.0%。可见，合理掺量和长度的PE与SF混掺可显著提高水泥基材料的抗折强度和变形能力。
（3）随着SF掺量、长度的增加，FCC试件的弯曲韧性系数呈增大趋势，当SF的长度为13 mm、掺量为0.9%时，FCC试件的弯曲韧性系数相对最大，为2.912 MPa，较JZ组提高了27.66%。
参考文献
[1] 陈兵,张东.新型水泥基复合材料的研究与应用[J].新型建筑材料,2000(4):28-30.
[2] SHI T,LIU Y M,HU Z J,et al.Deformation performance and fracture toughness of carbon nanofiber-modified cement-based materials[J].ACI Materials Journal,2022,119(5):119-128.
[3] 沈才华,钱晋,陈晓峰,等.纤维掺量对PVA纤维混凝土力学参数的影响及压缩韧性指标的计算方法[J].硅酸盐通报,2020,39(10):3152-3160.
[4] 刘军宏,郑银林,马锋玲,等.不同PVA纤维增强水泥基复合材料性能试验研究[J].混凝土与水泥制品,2023(2):55-59.
[5] 刘高鹏,廖宜顺,刘立军,等.苎麻纤维水泥基材料的力学性能与自收缩试验研究[J].功能材料,2019,50(7):7176-7181.
[6] 潘宜健,王政,刘雨时.预处理椰壳纤维对水泥基材料性能的影响研究[J].混凝土与水泥制品,2022(5):61-66.
[7] 丁聪,任金明,王永明,等.高延性水泥基复合材料用短切PVA纤维的长度优选研究[J].材料导报,2023,37(13):253-260.
[8] 陆洲导,林晨旭,余江滔,等.可用于无钢筋建造的超强超韧水泥基复合材料[J].同济大学学报(自然科学版),2017,45(6): 880-884.
[9] SAID S H,RAZAK H A,OTHMAN I.Flexural behavior of engineered cementitious composite(ECC) slabs with polyvinyl alcohol fibers[J].Construction and Building Materials,2015,75:176-188.
[10] 郭远臣,刘芯州,王雪,等.多尺度钢纤维混杂增强水泥基材料抗冲击性能及阻裂能力[J].材料导报,2024,38(2):81-88.
[11] 霍彦霖,孙华阳,刘天安,等.混杂纤维增强应变硬化水泥基复合材料抗弯冲击性能[J].复合材料学报,2022,39(11):5086-5097.
[12] 王振波,张君,王庆.混杂纤维增强延性水泥基复合材料力学性能与裂宽控制[J].建筑材料学报,2018,21(2):216-221,227.
[13] 宋梦凡,王金邦,栾从起,等.碳酸钙晶须对SHCC性能的影响[J].混凝土,2022(3):14-19.
[14] WANG Z B,HAN S,SUN P,et al.Mechanical properties of polyvinyl alcohol-basalt hybrid fiber engineered cementitious composites with impact of elevated temperatures[J].Journal of Central South University,2021,28(5):1459-1475.
[15] KIM M J,YOO D Y,YOON Y S.Effects of geometry and hybrid ratio of steel and polyethylene fibers on the mechanical performance of ultra-high-performance fiber-reinforced cementitious composites[J].Journal of Materials Research and Technology,2019,8(2):1835-1848.
[16] YOO D Y,KIM M J.High energy absorbent ultra-high-performance concrete with hybrid steel and polyethylene fibers[J].Construction and Building Materials,2019,209:354-363.
[17] FENG H,LI L L,WANG W Q,et al.Mechanical properties of high ductility hybrid fibres reinforced magnesium phosphate cement-based composites[J].Composite Structures,2022,284:115219.
[18] 王照耀,梁兴文,翟天文,等.钢-PVA混杂纤维增强水泥基复合材料永久模板叠合RC单向板短期刚度计算方法[J].材料导报,2024,38(3):126-134.
[19] QING L,SUN H,ZHANG Y,et al.Research progress on aligned fiber reinforced cement-based composites[J].Construction and Building Materials,2023,363:129578.
[20] FANG H Z,GU M G,ZHANG S F,et al.Effects of steel fiber and specimen geometric dimensions on the mechanical properties of ultra-high-performance concrete[J].Materials,2022,15(9):3027.
[21] 国家市场监督管理总局,国家标准化管理委员会.水泥胶砂强度检验方法(ISO法):GB/T 17671—2021[S].北京:中国标准出版社,2021.
[22] 韩建国,阎培渝.混凝土弯曲韧性测试和评价方法综述[J].混凝土世界,2010(11):42-45.
[23] HOSEINI S O,SOHRABI M R,MOUSAVI S R,et al.Effects of coarse aggregate and wavy steel fiber volumes on the critical stress intensity factors of modes Ⅰ and Ⅲ cracks in self-compacting concrete using ENDB specimens[J].Theoretical and Applied Fracture Mechanics,2022,121:103421.
引用本文
姜超,朱学军,陈文文,等.SF-PE纤维混杂水泥基材料抗折性能研究[J].混凝土与水泥制品,2025(6):42-46,52.
JIANG C,ZHU X J,CHEN W W,et al.Study on flexural performance of SF-PE hybrid fiber reinforced cementitious materials[J].China Concrete and Cement Products,2025(6):42-46,52.
上一个： 混杂纤维UHPC的性能研究
相关文件