降温速率对混凝土冻结应力的影响及机理研究

doi:10.11896/cldb.19030213

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Abstract Frost resistance is one of the important indicators of concrete durability, but freeze-thaw damage of concrete can not been fully explained by any frozen damage theory. Different from the macroscopic antifreeze performance characterization test such as mass loss and dynamic elastic modulus change, a developed device was used to study the freezing stress in a single cooling stage in this paper. The course of freezing stress initial generate, grow, and its final value of the concrete with C30 strength grade and F300 antifreeze grade was compared at -17 ℃, -40 ℃ low temperature, 60 ℃/h, 30 ℃/h, 20 ℃/h, 10 ℃/h and other four cooling rate conditions. The test results showed that the freezing stress of the concrete during the freezing stage can be tested. The cooling rate mainly affects the initial generation time and the increasing speed of the frozen stress. The central temperature of the concrete specimen mainly affects the final frozen stress. Based on the ice crystal growth thermodynamic theory and the mechanics theory porous media, the concrete frozen stress composition and its mechanism model were proposed. This model can explain the effect mechanism of cooling rate and the final low temperature on the frost resistance of concrete.

Key words： concrete frost resistance cooling rate freezing stress mechanism

Published: 25 April 2020

CLC number:

TU5

Fund:This work were financially supported by the National Natural Science Foundation of China (51579155,11932066) and the Natural Science Foundation of Jiangsu Province (BK20191131).

About author:: Xueliang Ge received his Ph.D. degree from Wuhan University in 2008. He is currently a professor in Nanjing Hydraulic Research Institute. His research inte-rests are water engineering safety under climate change and durability of hydraulic concrete.

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	GE Xueliang
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Cite this article:

GE Xueliang,LU Cairong,MEI Guoxing. Research on Effect of Cooling Rate on Concrete Freezing Stress and Its Mechanism[J]. Materials Reports, 2020, 34(8): 8051-8057.

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http://www.mater-rep.com/EN/10.11896/cldb.19030213 OR http://www.mater-rep.com/EN/Y2020/V34/I8/8051

1 Susanta C.Cement and Concrete Research, 1999,29(5),781.
2 Stefan J.Cement and Concrete Research, 2005,35(2),213.
3 Bjorn J.Cement and Concrete Research, 2010, 32(1),73.
4 Setzer M J.Journal of Colloid and Interface Science, 2001,243(1),193.
5 Mu Ru,Tian Wenling,Zhou Mingjie. Journal of the Chinese Ceramic So-ciety, 2010,38(9),1713.
6 Jiang Zhengwu,Li Xiongying.Journal of the Chinese Ceramic Society, 2010, 38(4),602(in Chinese).
蒋正武,李雄英.硅酸盐学报,2010, 38(4),602.
7 Li Jinyu, Cao Jianguo,Xu Wenyu, et al.Journal of Hydraulic Enginee-ring,1999,30(1),41(in Chinese).
李金玉,曹建国,徐文雨,等.水利学报,1999,30(1),41.
8 Tian Qian, Sun Wei. China Concrete and Cement Products, 1997,2(1),12(in Chinese).
田倩,孙伟.混凝土与水泥制品,1997,2(1),12.
9 You Youkun, Miao Changwen,Mu Ru. China Concrete and Cement Pro-ducts, 2000(5),14(in Chinese).
游有鲲,缪昌文,慕儒.混凝土与水泥制品, 2000(5),14.
10 Guan Yugang, Sun Wei, Miao Changwen.Journal of the Chinese Ceramic Society, 2001,29(6),530(in Chinese).
关宇刚,孙伟,缪昌文. 硅酸盐学报, 2001,29(6),530.
11 Powers T C. ACI Journal,1945,50(9),741.
12 Powers T C, Helmuth R A.Proceedings Highway Research Board, 1953(32),285.
13 Helmuth R A. In: the 4^th International Conference on Chemistry of Cement. Washington,1962, pp.855.
14 Mehta P K. Concrete: Microstructure, Properties, and Materials, McGraw-Hill Press, United States,2016.
15 Ge Xueliang,Lu Cairong, Mei Guoxing.Materials Research Innovations,2015(1),37.
16 Lu Cairong, Mei Guoxing, Ge Xueliang, et al.In: International Confe-rence on Climate Change and Water. Nanjing, 2010, pp. 32.
17 Lu Cairong, Ge Xueliang, Mei Guoxing, et al.Journal of Hydroelectric Engineering, 2013(6),229(in Chinese).
陆采荣,戈雪良,梅国兴,等. 水力发电学报,2013(6),229.
18 Lu Cairong, Ge Xueliang,Mei Guoxing. Materials Research Innovations, 2015(5), 389.
19 Ge Xueliang, Liu Weibao.Advances in Climate Change Research,2015 (5),319(in Chinese).
戈雪良,刘伟宝.气候变化研究进展,2015(5),319.
20 戈雪良,陆采荣,梅国兴,等.中国专利,CN201710717919.6, 2017.
21 Zhang Shiping, Hu Pingchun.Bulletin of the Chinese Ceramic Society, 2011(10),1182(in Chinese).
张士萍,胡平淳.硅酸盐通报, 2011(10),1182.
22 Coussy O, Monteiro P J M.Computers and Geotechnics, 2007,34(4),279.
23 Coussy O, Monteiro P J M.Cement and Concrete Research, 2008,38(1),40.