Study on PVA Fiber Length Optimization for High Ductility Cementitious Composites
DING Cong1, REN Jinming1, WANG Yongming1, LI Xinyu1, YU Bing1, GUO Liping2,*
1 POWERCHINA Huadong Engineering Corporation Limited, Hangzhou 310000, China 2 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Abstract: In order to optimize the PVA fiber length for high ductility cementitious composites (HDCC), the PVA fibers with 6 mm, 9 mm, 12 mm, 18 mm and 24 mm were adopted in this study, then the effects of PVA fiber length on the workability, mechanical properties and bridging abilities of HDCC were investigated. Results showed that the fluidity of fresh HDCC decreased gradually with the increase of fiber length, and the fluidity significantly decreases 39% when the fiber length increases from 6 mm to 9 mm. The compressive strength and flexural strength of HDCC increase with the addition of fiber, but it has little correlation with the fiber length. HDCC with 18 mm fibers showed the highest bending strength, while HDCC with 9 mm fibers showed the highest mid-span deflection and bending energy consumption. Micromechanical analysis shows that with the increase of fiber length, the fiber bridging abilities are stronger, the increase of fiber bridging stress and complementary energy gradually slows down due to seriously ruptured effect of fibers. Based on the test and calculation results of HDCC working properties, mechanical properties and fiber bridging capacity, the more appropriate choice of 9 mm fibers is obtained.
1 Li V C. Journal of the Chinese Ceramic Society, 2007, 35(4), 531 (in Chinese). Li V C. 硅酸盐学报, 2007, 35(4), 53. 2 Li Q H, Xu S L. Engineering Mechanics, 2009, 41(6), 23 (in Chinese). 李庆华, 徐世烺. 工程力学, 2009, 41(6), 23. 3 Cao M L, Xu L, Zhang C. Journal of the Chinese Ceramic Society, 2015, 43(5), 632 (in Chinese). 曹明莉, 许玲, 张聪. 硅酸盐学报, 2015, 43(5), 632. 4 Gao Y N. Synthetic fiber in China, 2011, 40(6), 22 (in Chinese). 高亚宁. 合成纤维, 2011, 40(6), 22. 5 Jia R G. Synthesis of polyvinyl alcohol with low degree of polymerization and ultra-low degree of polymerization. Master's Thesis, Inner Mongolia University, China, 2018(in Chinese). 贾瑞钢. 低聚合度和超低聚合度聚乙烯醇的合成. 硕士学位论文, 内蒙古大学, 2018. 6 Ding C, Guo L P, Chen B. Construction and Building Materials, 2020, 259, 119824. 7 Maalej M, Li V C, Kanda T. Journal of Engineering Mechanics, 1995, 121(8), 903. 8 Li V C, Wu C, Wang S, et al. ACI Material Journal, 2002, 99, 463. 9 Zhang Z, Zhang Q. Construction and Building Materials, 2018, 161, 420. 10 Li J, Yang E H. Cement and Concrete Composites, 2017, 78, 33. 11 Zhou J, Qian S Z, Ye G, Copuroglu O, et al. Cement and Concrete Composites, 2012, 34, 342. 12 Pereira E B, Fischer G, Barros J A O. Cement and Concrete Composites, 2012, 34, 1114. 13 Lin Z, Kanda T, Li V C. Concrete Science Engeering, 1999, 1, 173. 14 Pakravan H R, Jamshidi M, Latifi M. Construction and Building Materials, 2016, 112, 739. 15 Corinaldesi V, Nardinocchi A. Composites Part B-Engeering, 2016, 98, 389. 16 Ahmed S F U, Mihashi H. Materials and Structures, 2011, 44, 1179. 17 Tan M L, Sun R J, Zhou Z D, et al. Railway Engineering, 2014(3), 115 (in Chinese). 谭明轮, 孙仁娟, 周志东, 等. 铁道建筑, 2014(3), 115. 18 Yu B Y, Zhou J W, Kong Y N, et al. Bulletin of the Chinese Ceramic Society, 2020, 39(11), 38 (in Chinese). 余保英, 周建伟, 孔亚宁, 等. 硅酸盐通报, 2020, 39(11), 38. 19 Georgiou A V, Pantazopoulou S J. Construction and Building Materials, 2016, 125, 1216. 20 Sasmal S, Avinash G. Construction and Building Materials, 2016, 128, 136. 21 Lu C, Leung C K Y. Cement and Concrete Research, 2016, 79, 353. 22 Ding C, Guo L P, Chen B. Construction and Building Materials, 2020, 247, 118491.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2023, Vol. 37 
