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Effects of particle size distribution, shape and volume fraction of aggregates on the wall effect of concrete via random sequential packing of polydispersed ellipsoidal particles

Author

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  • Xu, W.X.
  • Lv, Z.
  • Chen, H.S.

Abstract

Concrete can be viewed as granular materials at the mesoscopic level. A specific distribution of aggregate particles in boundary layers, known as the wall effect, plays an important role in the mechanical properties and durability of concrete. However, the detailed and systematic experimental and simulated data about the wall effect of concrete is hardly adequate yet. Specially, the modeling study of spherical and two-dimensional (2D) elliptical aggregates distribution for the wall effect has been focused on in previous work, little is known about three-dimensional (3D) ellipsoidal aggregates. In the present work, based on a mesostructure model of concrete, the wall effect of concrete is quantified by configuration parameters such as the volume fraction, the specific surface area and the meaning free spacing of the solid phase. In addition, the influences of ellipsoidal particle size distribution (EPSD), shape and volume fraction (Vf) of ellipsoidal aggregates on the configuration parameters are evaluated by stereological methods and serial section analysis technique. Furthermore, the effect mechanisms of EPSD, shape and Vf are analyzed and discussed in this paper. The reliability of the statistical results is verified by experimental data and theoretical analytical results.

Suggested Citation

  • Xu, W.X. & Lv, Z. & Chen, H.S., 2013. "Effects of particle size distribution, shape and volume fraction of aggregates on the wall effect of concrete via random sequential packing of polydispersed ellipsoidal particles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(3), pages 416-426.
    • Handle: RePEc:eee:phsmap:v:392:y:2013:i:3:p:416-426
    DOI: 10.1016/j.physa.2012.09.014
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    Cited by:

    1. Xu, Wenxiang & Chen, Wen & Chen, Huisu & Tian, Xia & Zhao, Haitao, 2014. "Determination of overlapping degree of interfacial layers around polydisperse ellipsoidal particles in particulate composites," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 399(C), pages 126-136.
    2. Yangzezhi Zheng & Yang Zhou & Fan Nie & Haoyuan Luo & Xiaoming Huang, 2022. "Effect of a Novel Vibration Mixing on the Fiber Distribution and Mechanical Properties of Ultra-High Performance Concrete," Sustainability, MDPI, vol. 14(13), pages 1-16, June.

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