Study on the correlation between pore structure characterization and early mechanical properties of foamed concrete based on X-CT

被引：0
|
作者：
Zhao, Danni [1 ]
Xu, Jiangbo [1 ]
Han, Zemin [1 ]
Liu, Yifan [1 ]
Liu, Yuan [2 ]
Yang, Xiaoyu [3 ]
机构：
[1] College of Highway, Chang'an University, Xi'an,710064, China
[2] Rocket force university of Engineering, Xi'an,710000, China
[3] Sichuan Jiaotou Design Consulting Research Institute Co.Ltd, Chengdu,610041, China
来源：
Construction and Building Materials | 2024年 / 450卷
关键词：
To investigate the differences in early mechanical properties between rapid-hardening foam concrete (RHFC) and ordinary foam concrete (OFC); as well as the influence of pore structure on early mechanical performance. Based on X-CT technology and uniaxial compression tests; the differences degree of early mechanical properties between the two were quantified; achieving 3D reconstruction and quantitative characterization of the pore structures; revealing the distribution patterns of pore structure parameters. Meanwhile; combined with grey relational theory; the correlation between pore structure and early mechanical properties was clarified; further explaining the underlying mechanisms of macroscopic mechanical property differences from the perspective of pore structure. The research indicates that the load-displacement curves of both types of foam concrete exhibit an initial densification phase; elastic phase; yield phase; and plateau phase; and that RHFC significantly outperforms OFC in terms of early compressive strength and total energy absorption. The OFC shows higher planar porosity and fractal dimensions in both 2D and 3D compared to RHFC. The pore size distribution of both types follows a non-standard lognormal distribution; primarily due to the uneven hydration reaction rates affecting bubble formation and expansion rates. Additionally; the pore shapes in both types are predominantly spherical; with sphericity values concentrated between 0.8 and 1.0. RHFC exhibits higher pore compactness; with negative correlations observed between sphericity; compactness; and pore volume. The primary pore connections are open and closed pores. There is a significant correlation between pore structure and early mechanical properties for both types of foam concrete; with correlation degrees of 0.6787 for porosity; 0.6667 for sphericity (0.9–1.0); and 0.6558 for compactness (0.4–1.0). This study provides a comprehensive theoretical basis and technical support for the application of RHFC in emergency repair and construction projects. © 2024 Elsevier Ltd;
D O I：
10.1016/j.conbuildmat.2024.138603
中图分类号：
学科分类号：
摘要：
引用
收藏
相关论文
共 50 条
  • [31] Study on pore structure and the mechanical properties of sandstone-concrete binary under freeze-thaw environment
    Hu, Anlong
    Xue, Guobin
    Shang, Zhipeng
    Cao, Zhe
    Wang, Xiaoping
    Fu, Yintao
    Huang, Xiaoqing
    SCIENTIFIC REPORTS, 2023, 13 (01)
  • [32] Study on early dynamic mechanical properties of inorganic polymer based fast hardening concrete
    Zhang, Hengbo
    Xu, Jinyu
    Luo, Xin
    Nie, Liangxue
    Wang, Yanan
    2020 4TH INTERNATIONAL WORKSHOP ON RENEWABLE ENERGY AND DEVELOPMENT (IWRED 2020), 2020, 510
  • [33] CHARACTERIZATION OF MECHANICAL-PROPERTIES OF COKE BASED ON PORE-STRUCTURE .2. RELATION BETWEEN THE PORE-STRUCTURE, TENSILE-STRENGTH AND EFFECTIVE YOUNGS MODULUS OF COKE
    SUGINOBE, H
    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1985, 71 (04): : S19 - S19
  • [34] A recycled crushed rock sand mortar based on Talbot grading theory: Correlation of pore structure and mechanical properties
    Jiang, Zhen
    Liu, Feng
    Cai, Guojun
    Liu, Zhiming
    Tian, Guanglin
    Lu, Zhaochi
    Yu, Songtao
    Construction and Building Materials, 2024, 446
  • [35] Correlation between thermo-mechanical properties and network structure in Ge x S 100–x chalcogenide glasses
    Zhu E.
    Liu Y.
    Sun X.
    Yin G.
    Jiao Q.
    Dai S.
    Lin C.
    Journal of Non-Crystalline Solids: X, 2019, 1
  • [36] Optimization of mechanical properties and pore structure of lightweight geopolymer concrete using GGBFS based on LF-NMR technology
    Zhong, W. L.
    Wang, H.
    Zhao, X.
    Li, J. X.
    Fan, L. F.
    MAGAZINE OF CONCRETE RESEARCH, 2024, : 1 - 34
  • [37] Experimental study on pore structure and dynamic mechanical properties of modified rubber concrete after freeze-thaw cycle
    Minggao Chen
    Shujie Yang
    Shuyuan Wang
    Yan Zhou
    Scientific Reports, 15 (1)
  • [38] Experimental Study on Mechanical Properties and Fractal Dimension of Pore Structure of Basalt-Polypropylene Fiber-Reinforced Concrete
    Niu, Ditao
    Huang, Daguan
    Zheng, Hao
    Su, Li
    Fu, Qiang
    Luo, Daming
    APPLIED SCIENCES-BASEL, 2019, 9 (08):
  • [39] Study on pore structure characteristics of circulating fluidized bed fly ash-based lightweight foamed filler based on X-ray computed tomography
    Yang, Jingchao
    Wang, Xingyi
    Huang, Xi
    Pei, Yansen
    Wang, Xiaoyuan
    Han, Pengju
    Bai, Xiaohong
    Materials and Structures/Materiaux et Constructions, 2025, 58 (01):
  • [40] Mechanical properties, pore structure and freeze-thaw resistance of recycled aggregate concrete based on ash of mushroom and corn straw
    Chen, Shoukai
    Wang, Yajun
    Liu, Yang
    Zhao, Mengdie
    STRUCTURES, 2024, 68
12345