Mechanical properties and strength index conversion of recycled aggregate concrete under direct shear

被引：0
|
作者：
Chen Y. [1 ]
Liu J. [1 ]
Wu H. [1 ]
Yan F. [1 ]
机构：
[1] College of Civil and Architecture Engineering, Guangxi University of Science and Technology, Liuzhou
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 11期
关键词：
Direct shear; Mechanical properties; Recycled aggregate concrete; Shear strength; Strength index;
D O I：
10.13801/j.cnki.fhclxb.20210122.001
中图分类号：
学科分类号：
摘要：
In order to study the effect of replacement rate of recycled aggregate concrete (RAC) on the direct shear performance of concrete, 75cubic specimens incorporating different replacement rates of RCA were fabricated. The direct shear test, compressive strength test and splitting tensile strength test were carried out. The failure mechanism of direct shear and the conversion rule between different strength indexes of RAC were revealed. The results show that RAC is obviously brittle failure under direct shear and both the coarse aggregate and cement matrix are sheared. With the increase of the replacement rate, the direct shear strength of RAC has little change compared with the ordinary concrete, and shows a decreasing trend in general. However, the direct shear strength of RAC increases when the replacement rate is 50% (by mass). The peak shear deformation generally increases by 18.85% and the initial shear deformation modulus decreases by 8.97% on average. Finally, based on experimental data, the conversion relationship of RAC between the shear and the compressive and split tensile strength was proposed. The calculated results are in good agreement with the experimental values. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
引用
收藏
页码：3962 / 3970
页数：8
相关论文
共 22 条
  • [1] MEDINA C, ZHU W Z, HOWIND T, Et al., Influence of mixed recycled aggregate on the physical mechanical properties of recycled concrete, Journal of Cleaner Production, 68, pp. 216-225, (2014)
  • [2] CHEN Zongping, CHEN Yuliang, YING Wudang, Mechanical behavior and strength criterion of recycled aggregate concrete under triaxial compression, Journal of Building Materials, 19, 1, pp. 149-155, (2016)
  • [3] LI Jiabin, XIAO Jianzhuang, HUANG Jian, Influence of recycled coarse aggregate replacement percentages on compressive strength of concrete, Journal of Building Materials, 9, 3, pp. 297-305, (2006)
  • [4] LEITE M B, MONTEIRO P J M., Micro-structural analysis of recycled concrete using x-ray micro tomography, Construction and Building Materials, 81, pp. 38-48, (2016)
  • [5] SHANG Xiaoyu, YANG Jingwei, LI Jiangshan, Fractal characteristics of meso-failure crack in recycled coarseaggregate concrete based on CT image, Acta Materiae Compositae Sinica, 37, 7, pp. 1774-1784, (2020)
  • [6] CHEN Shoukai, LIU Xinfei, GUO Lei, Et al., Influence of recycled aggregate proportion on performance of recycled pervious concrete, Acta Materiae Compositae Sinica, 35, 6, pp. 1590-1598, (2018)
  • [7] Xiangqing, HE Wenchang, XING Lilii, Et al., Effect of steel fiber-polypropylene fiber hybrid additon on impact resistance of recycled aggregate concrete, Acta Materiae Compositae Sinica, 37, 7, pp. 1763-1773, (2020)
  • [8] LIU Kaihua, Experimental study on behavior of recycled concrete under combined compressive and shearing stresses, pp. 47-49, (2014)
  • [9] WASEEM S A, SINGH B., An experimental study on shear capacity of interfaces in recycled aggregate concrete, International Federation for Structural Concrete, 19, pp. 230-245, (2018)
  • [10] LIU B, FENG C, DENG Z H., Shear behavior of three types of recycled aggregate concrete, Construction and Building Materials, 217, pp. 557-572, (2019)
123