Abstract: Effects of the compressive and flexural strengths of reactive powder concrete (RPC) cured for 1, 3, 7, 14 and 28 d after adding sulphoaluminate cement (SAC)were studied. In addition, the effects of NaCl dry-wet cycles on RPC compressive strength, flexural strength, bond strength and chloride ion permeability coefficient of composite cement (SAC accounts for 50% of the total cement) were emphatically studied. Results show that the increase of SAC content in RPC at early ages (less than 7 d) has a positive impact on its compressive and flexural strength. However, when the curing age is greater than 7 d, the addition of SAC has a negative effect on the compressive and flexural strength of RPC. For RPC with 50% SAC, the strength will grow with the volume fraction of PPFs increases. When the fiber volume fraction increases from 2.5% to 3.0%, the strength of RPC tends to be stable. NaCl dry-wet cycles will reduce the strength of RPC and increase the chloride ion permeability of RPC. The addition of PPFs will delay the decrease of RPC strength and reduce the permeability of chloride ions.
通讯作者:
* 汪晖,宁波大学土木与环境工程学院副教授、博士研究生导师。2011年华东交通大学土木建筑学院土木工程专业本科毕业,2017年哈尔滨工业大学土木工程专业博士毕业后到宁波大学工作至今。目前主要从事多功能智能混凝土、防灾减灾、生态建筑材料、桥面板修复、混凝土耐久性、工程灾害预测等方面的研究工作。发表论文40余篇,包括Cement and Concrete Composite、Construction and Buil-ding Materials、Cold Regions Science and Technology、Materials Research Express、Materials、Coatings、《硅酸盐通报》等。wanghui4@nbu.edu.cn
引用本文:
汪晖, 王轲炜, 梁昭. NaCl干湿交替作用对复配水泥活性粉末混凝土性能的影响[J]. 材料导报, 2023, 37(23): 22070005-5.
WANG Hui, WANG Kewei, LIANG Zhao. Effect of NaCl Dry-Wet Cycles on Properties of Mixed Cement Reactive Powder Concrete. Materials Reports, 2023, 37(23): 22070005-5.
1 Wang H, Cai X, Rao C M, et al. Materials, 2022, 15(9), 3371. 2 Tang X D, Xu Q, Qian K L, et al.Construction and Building Materials, 2021, 303, 124139. 3 Zhou S, Woody J. International Journal of Damage Mechanics, 2021, 30(8), 1213. 4 Hong X H, Wang H, Shi F T, et al.Coatings, 2020, 10(12), 1227. 5 Wang H, Jin K K, Zhang A L, et al. Construction and Building Mate-rials, 2021, 275, 06629. 6 Gencel O, Ozel C, Brostow W, et al.Materials Research Innovations, 2011, 15, 216. 7 Soutsos M, Le T, Lampropoulos A, et al.Construction and Building Materials, 2012, 36, 704. 8 Liu Y S, Tian W C, Wang M Z, et al. Construction and Building Mate-rials, 2020, 244, 118344. 9 Ding Y N, Wang Q X, Pacheco-Torgal F, et al. Construction and Buil-ding Materials, 2020, 261, 119881. 10 Wang J M, Xiao Z Q, Fan Y T, et al. Materials Reports, 2022, 36(2), 87(in Chinese). 王建民, 肖自强, 范奕涛, 等. 材料导报, 2022, 36(2), 87. 11 Ding Y N, Huang Y S, Zhang Y L, et al. Construction and Building Materials, 2015, 101, 440. 12 Jiang W Q, Shen X H, Xia J, et al. Construction and Building Materials, 2018, 179, 553. 13 Liu X R, Wang R. Journal of the Chinese Ceramic Society, 2022, 50(2), 354(in Chinese). 刘校荣, 王茹. 硅酸盐学报, 2022, 50(2), 354.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2023, Vol. 37 
