Application of recycled aggregate porous concrete pile (RAPP) to improve soft ground

Sewon Kim, Dongseop Lee, Jongwon Lee, Seung Kyong You, Hangseok Choi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


In this study, a series of laboratory chamber tests was carried out to evaluate the applicability of a porous concrete pile fabricated with recycled aggregates for soft ground improvement. The recycled aggregate porous concrete pile (RAPP) has been developed to replace natural aggregates and to overcome technical problems associated with the conventional compaction piling systems. The laboratory chamber tests for evaluating the performance of RAPP were carried out with a cylindrical mold of 280 mm in internal diameter and 580 mm in height. A replacement area ratio of 5 % and three different loading steps were applied in the chamber tests. The experimental results of the surface settlement, excess pore pressure and vertical stress distribution versus time were compared with those of the sand compaction pile (SCP) reinforced composite ground under the same experimental condition. In addition, the experimental results were compared with the numerical simulation using ABAQUS. The current study shows that the settlement reduction in the RAPP-reinforced system is significantly enhanced due to load transfer from the soil formation to the RAPP. Furthermore, the comparison of consolidation rates shows that the RAPP can also accelerate the consolidation of soft clay formation because the RAPP behaves as a vertical drain.

Original languageEnglish
Pages (from-to)360-370
Number of pages11
JournalJournal of Material Cycles and Waste Management
Issue number4
Publication statusPublished - 2012 Oct


  • Improvement
  • Laboratory chamber test
  • Porous concrete pile
  • Recycled aggregate
  • Soft ground

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials


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