Flexural behavior of recycled coarse aggregate concrete beams after freeze-thaw cycles

被引：0
|
作者：
Wu J. [1 ,2 ]
Liu X. [1 ,2 ]
Afshin I. [1 ,2 ]
机构：
[1] Department of Civil Engineering and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] Jiangsu Airport Infrastructure Safety Engineering Research Center, Nanjing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷
关键词：
Flexural capacity; Freeze-thaw cycle; Recycled coarse concrete; Reinforced concrete beam; Static test;
D O I：
10.14006/j.jzjgxb.2020.S1.028
中图分类号：
学科分类号：
摘要：
In order to investigate the effect of freeze-thaw cycles on the flexural behavior of recycled coarse aggregate concrete beam, the mass loss, compressive strength and dynamic elastic modulus of recycled coarse concrete specimens which had undergone different freeze-thaw cycles were measured in the study. The flexural behavior of recycled concrete beams with 0, 25, 50 and 75 cycles of freeze-thaw was tested, and the failure patterns, cracking load, ultimate bearing capacity, the strains of concrete and reinforcement, as well as the mid-span deflection of recycled concrete beams after freeze-thaw were investigated. The results show that the mass of recycled concrete increases with the number of freeze-thaw cycles up to 25 times, and then decreases with the freeze-thaw cycles if over 25 times. The compressive strength and relative dynamic modulus of recycled concrete decrease with the increase of freeze-thaw cycles. The cracking loads and ultimate loads of beams decrease with the increase of freeze-thaw cycles, and the ultimate deflections of beams decrease with the increase of freeze-thaw cycles. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
引用
收藏
页码：247 / 255
页数：8
相关论文
共 21 条
  • [1] WU Zhongwei, Materials of concrete:composition and structure of various concretes, Concrete and Building Components, 4, pp. 1-6, (1980)
  • [2] DAI Xianming, Actively promote the development of green building and practice the low carbon concept of concrete industry:work report of the Second Council of the fifth session of concrete branch of China Construction Industry Association, Concrete, 1, pp. 1-3, (2012)
  • [3] ZHOU Xiling, YANG Jia, ZHANG Sheng, Promote the construction of low carbon city with ecological concrete, Concrete, 10, pp. 98-100, (2011)
  • [4] XIAO Jianzhuang, Recycled aggregate concrete, (2008)
  • [5] ZHAO Tongtong, WEN Ya'nan, WANG Chang, Et al., Overview of recycled concrete, 2019 National Forum on innovation and development of education and teaching, pp. 342-343, (2019)
  • [6] BOGAS J A, DE BRITO J, RAMOS D., Freeze-thaw resistance of concrete produced with fine recycled concrete aggregates, Journal of Cleaner Production, 115, 3, pp. 294-306, (2016)
  • [7] WU Hairong, JIN Weiliang, ZHANG Fengjian, Research progress of freeze-thaw damage characteristics of concrete, China Civil Engineering Journal, 51, 8, pp. 37-46, (2018)
  • [8] XU Gang, GONG Chao, LIU Jun, Et al., The correlation between the freeze-thaw resistance of concrete and the cyclic action of salt freeze-thaw, Journal of Building Materials, pp. 1-10
  • [9] CAO Dafu, GE Wenjie, GUO Rongyi, Et al., Experimental study on flexural behavior of reinforced concrete beams after freeze-thaw cycles, Journal of Building Structures, 35, 6, pp. 137-144, (2014)
  • [10] XIAO Jianzhuang, Recycled aggregate concrete structures, (2018)
123