Study of Flexural Strengthening and Toughening Effect of Basalt Minibar on Magnesium Phosphate Cement Repair Mortar
LI Wei1,2, XIE Jian1,3,*, TONG Chenglong4
1 School of Civil Engineering, Tianjin University/Key Laboratory of Coast Civil Structure Safety of the Ministry of Education, Tianjin University, Tianjin 300350, China 2 School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China 3 Beijing Engineering Research Center of Existing Building Renovation(Tianjin Branch), Tianjin 300350, China 4 The 3rd Construction Co., Ltd., of China Construction 5th Engineering Bureau, Tianjin 300300, China
Abstract: In order to study the strengthening and toughening modification of basalt minibar on magnesium phosphate cement repair mortar (MPCRM), the effects of different test parameters (fiber type, fiber volume fraction, water-binder ratio and curing conditions) on flexural strength and toughness of MPCRM were analyzed by four-point bending test. The results show that the basalt minibar has excellent flexural strengthening and toughening properties for MPCRM, and its toughening effect is better than that of traditional basalt monofilament fiber. Under the condition that the volume fraction of basalt minibar is not less than 1.0%, the flexural strength and toughness of MPCRM increase with the increase of volume fraction of basalt minibar. The flexural toughness of basalt minibar reinforced MPCRM decreases with the increase of water-binder ratio, while its flexural strength increases first and then decreases. The bending performance of basalt minibar reinforced MPCRM with water-binder ratio of 0.18 and the volume fraction of 1.5% is the best. The low temperature curing conditions cause the deterioration of the bending performance of MPCRM, the incorporation of basalt minibar can partially compensate for the frost damage of MPCRM.
1 Lu C F. China Railway, 2017, 56(7), 1 (in Chinese). 卢春房. 中国铁路, 2017, 56(7), 1. 2 Liu D J, Zhong F, Huang H W, et al. China Journal of Highway and Transport, 2021, 34(11), 178 (in Chinese). 刘德军, 仲飞, 黄宏伟, 等. 中国公路学报, 2021, 34(11), 178. 3 Liu J, Guo R H, Zhang Z Q. Materials Reports, 2021, 35(23), 23068 (in Chinese). 刘进, 呙润华, 张增起. 材料导报, 2021, 35(23), 23068. 4 Li Y, Bai W L, Shi T F. Construction and Building Materials, 2017, 142, 459. 5 Meng X R, Jiang Y, Chen B, et al. Construction and Building Materials, 2023, 408, 133612. 6 Qin J H, Qian J S, Song Q, et al. Journal of the Chinese Ceramic Society, 2022, 50(6), 1592 (in Chinese). 秦继辉, 钱觉时, 宋庆, 等. 硅酸盐学报, 2022, 50(6), 1592. 7 Haque M A, Chen B, Ahmad M R, et al. Construction and Building Materials, 2020, 235, 117447. 8 Tang Z B, Chen D D, Wang X P, et al. Journal of Building Engineering, 2023, 68, 106123. 9 Yang Z H, Liu S J, Wu K, et al. Materials Reports, 2023, 37(1), 118 (in Chinese). 杨正宏, 刘思佳, 吴凯, 等. 材料导报, 2023, 37(1), 118. 10 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. 11 Jia X W, Si D K, Zhang X, et al. Materials Reports, 2016, 30(22), 138 (in Chinese). 贾兴文, 司端科, 张新, 等. 材料导报, 2016, 30(22), 138. 12 Feng H, Chen G, Gao D Y, et al. Advances in Civil Engineering, 2018, 24, 547. 13 Wang Q X. Study on alkali resistance of basalt fiber and effect of the fiber composites on mechanical properties of concrete. Ph. D. Thesis, Dalian University of Technology, China, 2021 (in Chinese). 王庆轩. 玄武岩纤维的耐碱性能及其复合材料对混凝土力学性能的影响. 博士学位论文, 大连理工大学, 2021. 14 Branston J, Das S, Kenno S Y, et al. Construction and Building Materials, 2016, 124, 878. 15 Jiang K D, Wang X, Chen Z Y, et al. Construction and Building Materials, 2022, 351, 128952. 16 Li M, Yue Y F, Qian J S, et al. Journal of Civil and Environmental Engineering, 2023, 45(2), 194(in Chinese). 李茂, 岳燕飞, 钱觉时, 等. 土木与环境工程学报(中英文), 2023, 45(2), 194. 17 Bhutta A, Farooq M, Zanotti C, et al. Materials and Structures, 2017, 50, 80. 18 Yoo D Y, Shin W, Banthia N, et al. Cement and Concrete Composites, 2021, 124, 104269. 19 China Association for Engineering Construction Standardization. Standard test methods for fiber reinforced concrete:CECS 13:2009, China Planning Press, China, 2010 (in Chinese). 中国工程建设标准化协会. 纤维混凝土试验方法标准:CECS 13:2009, 中国计划出版社, 2010. 20 ASTM. Standard test method for flexural toughness and first-crack strength of fiber reinforced concrete (using beam with third-point loading):ASTM C 1018-97, ASTM International, West Conshohocken, USA, 1997. 21 Qin J H, Qian J S, Li Z, et al. Construction and Building Materials, 2018, 188, 946. 22 ASTM. Standard test method for flexural performance of fiber reinforced concrete (using beam with third-point loading):ASTM C 1609/C 1609M-19, ASTM International, West Conshohocken, USA, 2019. 23 Ministry of Housing and Urban-Rural Development of the People's Republic China. Steel fiber reinforced concrete:JG/T 472-2015, China Standards Press, China, 2015 (in Chinese). 中华人民共和国住房和城乡建设部. 钢纤维混凝土:JG/T 472-2015. 中国标准出版社, 2015. 24 Gao D Y, Zhao L P, Feng H, et al. Journal of Building Materials, 2014, 17(5), 783 (in Chinese). 高丹盈, 赵亮平, 冯虎, 等. 建筑材料学报, 2014, 17(5), 783.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2024, Vol. 38 
