PENG Zhuo, ZHU Deju, SHI Caijun, GUO Shuaicheng, LI Ning
Key Laboratory for Green and Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha 410082, China
Abstract: Reinforcement with the basalt textile can improve both the mechanical performance and volume stability of the alkali-activated cementitious materials. But the current understanding of its durability and long-term performance is still limited. In order to resolve this issue, accelerated aging experiment, flexural test and microscale characterization with scanning electron microscopy (SEM) were conducted for the basalt textile reinforced alkali-activated slag-fly ash cement mortar and Portland cement mortar specimens with and without epoxy coating. The experimental results indicate that compared with that of Portland cement mortar specimens, the flexural strength of the textile reinforced alkali-activated cement mortar specimens decreased more obviously with accelerated aging. After exposure for 24 d, the strength retention rate of alkali-activated cement mortar specimens and Portland cement mortar specimens are 68.94% and 81.69% respectively. The epoxy coating can improve the flexural strength and mitigate the alkaline deterioration on the flexural strength in the early stage of aging. But the effect of the epoxy coating gradually weakens with the increase of the age, and roughly fails at 18 d. Specifically, the reduction degree on the ultimate flexural strain is more obvious compared to that of the flexural strength. The basalt fibers embedded in the Portland cement mortars present local pit corrosion, while the wholescale pit corrosion can be found on the surface of those embedded in the alkali-activated cement mortars. These results support that the epoxy coating can effectively protect textiles from the alkali solution in matrix, but it degrades gradually during the accelerated aging process. Hence, the development of new surface treatment methods is needed to achieve more durable and effective surface protection for the basalt fiber in alkaline solution.
作者简介: 彭卓,湖南大学土木工程学院硕士研究生,在史才军教授、朱德举教授的指导下进行研究。目前主要研究领域为织物增强水泥基复合材料。 朱德举,湖南大学教授,博士研究生导师。在高性能织物增强水泥基复合材料、纤维增强树脂基复合材料(复材)和海水海砂混凝土及海洋环境中的复材筋增强混凝土结构、生物材料和仿生材料的多尺度力学行为及仿生设计与制备等交叉领域进行了深入系统的研究。近5年来,主持国家级和省部级科研项目10项。发表SCI/EI文章84篇,英文著作章节2篇。曾获日本混凝土学会期刊Journal of Advanced Concrete Technology最佳论文奖。国际学术期刊Journal of Sustainable Cement-Based Materials编委,中国复合材料学会土木工程复合材料分会委员,Cement and Concrete Composites等二十余个国际权威期刊的审稿人。
1 Shi C, Roy D, Krivenko P. Alkali-activated cements and concretes, CRC Press, USA, 2006. 2 Shi C,Stegemann J A.Cement and Concrete Research,2000,30(6),803. 3 Shi C. Cement and Concrete Research,1996, 26(12),1789. 4 Shi C. Advances in Cement Research, 2003, 15(2), 77. 5 Mobasher B. Mechanics of fiber and textile reinforced cement composites, CRC Press, USA, 2011. 6 Peled A, Mobasher B. Journal of Materials in Civil Engineering, 2007, 19(4), 340. 7 Xu S L, Li H. Journal of Building Materials,2006,9(4),481(in Chinese). 徐世烺, 李赫. 建筑材料学报, 2006, 9(4), 481. 8 Banholzer B, Brockmann T, Brameshuber W. Materials and Structures, 2006, 39(8), 749. 9 Xun Y, Zhang Q, Li Y T. China Civil Engineering Journal, 2008, 41(10), 39(in Chinese). 荀勇, 张勤, 李玉寿. 土木工程学报, 2008, 41(10), 39. 10 Brameshuber W, Brockmann T. In: Calcium Aluminate Cements 2001. London, 2001, pp. 659. 11 Orlowsky J, Raupach M, Cuypers H, et al. Materials and Structures, 2005, 38(2), 155. 12 Li T, Zhang Y, Dai J. Construction and Building Materials,2017,152,651. 13 Shaikh F U A, Patel A. Fibers, 2018, 6(1), 2. 14 Chi H L, Louda P, Periyasamy A P, et al. Fibers, 2018, 6, 87. 15 Menna C, Asprone D, Ferone C, et al. Composites Part B: Engineering, 2013, 45(1), 1667. 16 Cao L. Experimental study on RC beams shear strengthened with carbon fiber textile reinforced geopolymer mortar. Master's Thesis, South China University of Technology, China, 2016 (in Chinese). 曹亮. 纤维编织网增强地聚物砂浆抗剪加固钢筋混凝土梁试验研究. 硕士学位论文, 华南理工大学, 2016. 17 Zhao R, Shi C J, Wang X G, et al. Bulletin of the Chinese Ceramic Society, 2013, 32(9), 1794(in Chinese). 赵瑞, 史才军, 王小刚, 等. 硅酸盐通报, 2013, 32(9), 1794. 18 Kim D J, Naaman A E, El-tawil S. Cement and Concrete Composites, 2008, 30(10),917. 19 Pan Y C. Research on performance in fiber textile reinforced concrete sheet. Master's Thesis, Southeast University, China, 2006 (in Chinese). 潘永灿. 纤维织物增强混凝土薄板受力性能研究. 硕士学位论文, 东南大学, 2006. 20 Yang J M, Qian C X, Xun Y, et al. Journal of Building Materials, 2009, 12(5), 590(in Chinese). 杨建明, 钱春香, 荀勇, 等. 建筑材料学报, 2009, 12(5), 590. 21 Cao J H. Study on durability of glass fiber reinforced ordinary Portland cement. Ph.D. Thesis, Chongqing University, China, 2004 (in Chinese). 曹巨辉. 玻璃纤维增强普通硅酸盐水泥耐久性研究. 博士学位论文, 重庆大学, 2004. 22 Du Y B, Xun Y, Liu X Y. Concrete, 2008(9), 53(in Chinese). 杜玉兵, 荀勇, 刘小艳. 混凝土, 2008(9), 53. 23 Cheng C, He J, Zhang J, et al. Construction and Building Materials, 2019, 217, 128. 24 Kong K, Mesticou Z, Michel M, et al. Composite Structures, 2017, 179, 107. 25 Litherland K L, Oakly D R, Proctor B A. Cement and Concrete Research, 1981, 11(3), 455. 26 Rajabipour F, Maraghechi H, Fischer G. Journal of Materials in Civil Engineering, 2010, 22(12), 1201. 27 Rybin V A, Utkin A V, Baklanova N I. Cement and Concrete Research, 2013, 53, 1.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2021, Vol. 35 
