Failure Characteristics of Foam Concrete with Different Density under Uniaxial Compression

被引：0
|
作者：
Li S. [1 ]
Chen X. [1 ]
Zhang J. [2 ]
Dong W. [3 ]
机构：
[1] College of Civil Engineering and Transportation, Hohai University, Nanjing
[2] School of Civil Engineering, Southeast University, Nanjing
[3] Unit 96901, Beijing
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2021年 / 24卷 / 06期
关键词：
Acoustic emission(AE); Digital image correlation(DIC); Foam concrete; Uniaxial compression;
D O I：
10.3969/j.issn.1007-9629.2021.06.004
中图分类号：
学科分类号：
摘要：
To study the compression failure characteristics of foam concrete with different density, uniaxial compression tests of foamed concrete with density of 500-750 kg/m3 were carried out at different loading rates. Based on digital image correlation(DIC) and acoustic emission(AE) technology, the damage evolution of foam concrete was analyzed. The results show that with the increase of density, the yield stress, platform stress and energy absorption increase obviously. At the same time, the influence of loading rate is more obvious. The number of cracks decreases when the foam concrete is damaged, and the cracks change from vertical micro‑cracks to shear cracks with inclined angle. The activity of AE signal before the peak increases, and the sudden increase of ring count is more concentrated at the damage. The failure behavior shows the tendency from ductile failure to brittle failure. © 2021, Editorial Department of Journal of Building Materials. All right reserved.
引用
收藏
页码：1146 / 1153
页数：7
相关论文
共 17 条
  • [1] KUI W, SHAO Z S, QIN S., A solution for squeezing deformation control in tunnels using foamed concrete: A review, Construction and Building Materials, 257, (2020)
  • [2] SHI X N, HUANG J J, SU Q., Experimental and numerical analyses of lightweight foamed concrete as filler for widening embankment, Construction and Building Materials, 250, (2020)
  • [3] NAMBIAR E K K, RAMAMURTHY K., Air‑void characterisation of foam concrete, Cement and Concrete Research, 37, 2, (2007)
  • [4] HOU Mingyu, ZHU Xianchang, LI Guoqing, Et al., Review on the research and application of foam concrete, Bulletin of the Chinese Ceramic Society, 38, 2, (2019)
  • [5] ZHANG Yamei, SUN Chao, WANG Shen, Et al., Performance and pore structure of foam concrete with different density grades, Journal of Chongqing University, 43, 8, (2020)
  • [6] LI Guangliang, GUO Weiguo, ZHAO Rong, Et al., Mechanical properties and phenomenological constitutive model of lightweight foamed concrete, Journal of Materials Science and Engineering, 30, 3, (2012)
  • [7] PANG Chaoming, WANG Shaohua, Void characterization and effect on properties of foam concrete, Journal of Building Materials, 20, 1, (2017)
  • [8] ZHOU Lirui, GENG Fei, XI Yutong, Et al., Effect of pore structure on the water absorption and compressive strength of foam concrete, New Building Materials, 44, 7, (2017)
  • [9] SHI Jinna, ZHAO yanru, HAO Song, Et al., Deformation behavior of concrete after high temperature based on DIC technology, Journal of Building Materials, 22, 4, (2019)
  • [10] LAI Yushu, XIONG Yan, CHENG Longfei, Research and application of acoustic emission characteristics in the whole process of concrete loading test, Journal of Building Materials, 18, 3, (2015)
12