Advertisement

The Behavior of Expansive Particle Packing – DEM Simulation Using PFC3D Code

  • Seung-Min JeonEmail author
  • Sang-Hoon Park
  • Jaewon Jang
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 62)

Abstract

Ground upheaving occurs in expansive soils as a result of the absorption of water molecules onto the clay surface. The refractory materials deposited underground can also expand via the hydration process transforming from magnesium oxide to magnesium hydroxide. In this study, the behavior of expansive particle packing is investigated using Discrete Element Model (DEM) simulation. During simulation, the volume of the individual particle expands 2.5 times the initial volume. A couple of expansive particle fractions were considered ranging from 0.2 to 0.8. During the simulation, a constant vertical confining stress is applied and only vertical displacement is allowed. During expansion, the horizontal stress and vertical expansion is monitored as well as porosity. The results show that the earth pressure coefficient starts increasing from k = 0.5 initially, and finally reaches to k = 1.5 for the expansive particle fraction = 0.2 or k = 2.0 for the expansive particle fraction larger than 0.4. The porosity of the particle packing decreases during expansion. The particle packing under higher confining stress showed lower porosity.

Keywords

expansive particle packing magnesium oxide expansion force volume expansion 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Anovel approach for magnesia hydration assessment in refractory castables. Caramics International, pp 803–210.Google Scholar
  2. Hosung Shin and J. Carlos Santamariana. (2009). Mineral Dissolution and the Evolution of k0. ASCE, pp 1141–1147.Google Scholar
  3. J. P. Quirk. (1968). Particle interaction and soil swelling. Israel Journal of Chemistry, pp 213–234.CrossRefGoogle Scholar
  4. Minsu Cha and J. Carlos Santamariana. (2016). Effect of dissolution on the load-settlement behavior of shallow foundation. Canadian Geotechnical Journal, pp 1353–1357.CrossRefGoogle Scholar
  5. Stef Lommen and Dingena Schott. (2014). DEM Speedup: Stiffness effects on behavior of bulk material. Particuology, pp 107–112.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Hanyang UniversitySeoulRepublic of Korea

Personalised recommendations