Reliability Analysis of Freeze-thaw Damage of Ceramic Powder Recycled Concrete
QIAO Hongxia1,2, PENG Kuan1, CHEN Kefan1, LI Jiangchuan1, ZHU Xiangchen1
1 Key Laboratory of Disaster Prevention and Reduction in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China 2 Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
Abstract: In order to improve the recycling efficiency of waste ceramic powder, aiming at the poor frost resistance of recycled concrete, the effect of ceramic powder on the freeze-thaw resistance of recycled concrete under different substitution rates was studied. Six groups of mixtures with ceramic powder substitution rates of 0%, 10%, 20%, 30%, 40% and 50% were designed. Before the test, based on the principle of nuclear magnetic resonance (NMR), the porosity distribution, porosity and permeability of each group of specimens were calculated, and the relationship between porosity and permeability of recycled concrete with ceramic powder was established by using MATLAB. After each freeze-thaw cycle, the mass loss rate and relative dynamic modulus of each group of specimens were measured. Based on Palmgren theory, the reliability calculation model of freeze-thaw damage is established, and the residual life of each group of specimens is predicted. The results show that the dynamic modulus of elasticity decreases, the mass loss rate increases first and then decreases. When the replacement rate of ceramic powder is 20%, the porosity and permeability of recycled concrete with ceramic powder are the smallest, and the freeze-thaw cycle resistance is the strongest. In addition, the reliability calculation model of freeze-thaw damage based on Palmgren model has high reliability, which can directly reflect the relationship between the reliability of recycled ceramic powder concrete and freeze-thaw cycle, and has good applicability in practical application.
作者简介: 乔宏霞,兰州理工大学土木工程学院教授、博士研究生导师。2000年 7 月本科毕业于太原理工大学建筑与土木工程学院,2007 年 7 月在兰州理工大学结构工程专业取得博士学位,2009—2012 年在中国科学院青海盐湖研究所化学博士后流动站从事博士后研究工作。现为 AEIC专家库成员、国家科技部核心库专家、教育部学位中心学位论文评审专家、国家自然科学基金项目同行评议专家,入选九三学社中央组织的“院士导师计划”合作导师。主要从事普通混凝土和氯氧镁水泥混凝土耐久性评估与寿命预测的研究工作。近年来,在混凝土领域发表论文90 余篇,包括 Journal of Materials in Civil Engineering、Computers ＆ Concrete、Materials Research Innovations 和 Journal of Chemical and Pharmaceutical Research 等期刊文献。
1 Somayeh L,Manuel E,Eckhard W.Construction and Building Materials,2015,95,243. 2 Meyer C.Cement & Concrete Composites,2009,31,601. 3 Mustafa A.Information Engineering Research Institute, 2016,22(6),5. 4 Khuram R. Construction and Building Materials,2017,18(7),154. 5 Li Y, Li Q, Kong L,et al. Construction Technology, 2018, 47(3), 40(in Chinese). 李云峰,李强龙,孔令鹏,等.施工技术,2018,47(3),40. 6 Liu Q, Zhang M, Han X, et al.Concrete, 2016 (10), 84(in Chinese). 刘清,张萌,韩霞,等.混凝土,2016(10),84. 7 Li Lei. Mix design and performance study of recycled concrete with mi-neral admixtures in cold regions of Xinjiang. Ph.D. Thesis, Xinjiang University,China,2014(in Chinese). 李蕾. 新疆寒冷地区矿物再生混凝土配合比设计及其性能研究.博士学位论文,新疆大学,2014. 8 Yang Z, Gao S, Yu L.Journal of Building Materials,2019(2),128(in Chinese). 杨正宏,高双双,于龙.建筑材料学报,2019(2),128. 9 Zhang J, Wen Y, Ou X. Journal of Southwest Jiaotong University, 2018, 53(2), 296(in Chinese). 张俊儒,闻毓民,欧小强.西南交通大学学报,2018,53(2),296. 10 Zhou X, He Z, Yang H. Journal of Wuhan University, 2013, 46(5), 604(in Chinese). 周旭,何真,杨华美.武汉大学学报,2013,46(5),604. 11 Siw Y.Journal of Materials in Civil Engineering,2013,15(5),443. 12 Wang D,Zhang J F.Key Engineering Materials,2015,629-630,314. 13 Liu J,Fang X Y,Wang D S. Petroleum Science and Technology,2019,37(10),1138. 14 Sanhanamm C.Cement and Concrete Research,2017,31(6),845. 15 Yang Huijuan. Experimental study on durability of self-compacting concrete with iron tailings sand. Ph.D. Thesis, Hefei University of Techno-logy, China,2013(in Chinese). 杨会娟.铁尾矿砂自密实混凝土耐久性能试验研究.博士学位论文,合肥工业大学,2013. 16 Sibb I.Journal of Materials Engineering,2016,25(8),831. 17 Halit Y.Construction and Building Materials,2016,22,456. 18 Eataazniewska P.Construction and Building Materials,2015,48,178.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2020, Vol. 34 
