Influence of Expansion Agent and Shrinkage Reducing Agent on Circular Restrained Shrinkage of UHPC
DENG Zongcai1 , ZHAO Lianzhi2, LIAN Yihong1
1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China 2 China Road and Bridge Corporation, Beijing 100011, China
Abstract: In order to research the effect of expansion agent or shrinkage reducing agent on the circular restrained shrinkage of UHPC, experimental study on splitting tensile strength, elastic modulus and circular restrained shrinkage of UHPC with expansion agent or shrinkage reducing agent was carried out. The cracking risk and relaxation property of UHPC with expansion agent or shrinkage reducing agent were quantitatively analyzed. The results show that the splitting tensile strength after 7 d of age of UHPC was improved by adding expansion agent or shrinkage reducing agent. The strain of steel ring in each stage was reduced by adding expansion agent or shrinkage reducing agent and the maximum reduction range was 30.7% and 38.6% in 28 d. The tensile stress level of UHPC at all ages decreased to the safe control value with the addition of expansion agent. Among them, when the content of expansion agent was 6%, the effect of reduction was the best.
1 Wang J Y, Bian C, Xiao R C, et al. China Journal of Highway and Transport, 2019, 32(9),115(in Chinese). 王俊颜, 边晨, 肖汝诚, 等. 中国公路学报, 2019, 32(9), 115. 2 Li H R. Research on cementitious materials restrained shrinkage test methods. Ph.D. Thesis, Tianjin University, China, 2011 (in Chinese). 李浩然. 水泥基材料约束收缩试验方法研究. 博士学位论文, 天津大学, 2015. 3 Hossain A B, Weiss J. Cement & Concrete Composites, 2004, 26(5),531. 4 Corinaldesi V, Nardinocchi A, Donnini J.Construction and Building Materials, 2015, 91, 171. 5 Meddah M S, Suzuki M, Sato R. Construction and Building Materials, 2011, 25, 239. 6 Wang J Y, Bian C, Xiao R C, et al. Materials Reports, 2017, 31(23), 52 (in Chinese). 王俊颜, 边晨, 肖汝诚, 等.材料导报, 2017, 31(23), 52. 7 Park J J, Yoo D Y, Kim S W, et al. Magzine of Concrete Research, 2014, 66(14), 745. 8 Wang Y C, Zhang J F, Yang H Q, et al. Concrete, 2010(1), 136 (in Chinese). 王迎春, 张建峰, 杨华全, 等. 混凝土, 2010(1),136. 9 Li C, Chen B C, Huang Q W. Engineering Mechanics, 2019, 36(8), 49(in Chinese). 李聪, 陈宝春, 黄卿维. 工程力学, 2019, 36(8), 49. 10 Ma X W, Li X Y, Zhu W Z, et al. Journal of Building Materials, 2006(5),598 (in Chinese). 马新伟, 李学英, 朱卫中, 等. 建筑材料学报, 2006(5), 598. 11 Li C, Huang W, Chen B C. Journal of Fuzhou University( Natural Science Edition ), 2019, 47(2),251(in Chinese). 李聪, 黄伟, 陈宝春. 福州大学学报(自然科学版), 2019, 47(2), 251.
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2021, Vol. 35 
