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Compacted Anthropogenic Materials as Backfill for Buried Pipes.

Authors
  • Głuchowski, Andrzej1, 2
  • Šadzevičius, Raimondas2
  • Skominas, Rytis2
  • Sas, Wojciech1, 2
  • 1 SGGW Water Centre, Warsaw University of Life Sciences-SGGW, 02787 Warsaw, Poland. , (Poland)
  • 2 Institute of Hydraulic Engineering, Vytautas Magnus University Agriculture Academy, 53361 Kaunas, Lithuania. , (Lithuania)
Type
Published Article
Journal
Materials
Publisher
MDPI AG
Publication Date
Feb 03, 2021
Volume
14
Issue
4
Identifiers
DOI: 10.3390/ma14040717
PMID: 33546445
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Buried pipe design requires knowledge about the fill to design the backfill structure. The interaction between the backfill envelope and the pipe impacts the structural performance of the buried pipe. The backfill material and compaction level respond to the backfill's overall strength and, therefore, for pipe-soil interaction. The strength of backfill material is described in terms of modulus of soil reaction E' and constrained modulus Eode. As the E' is an empirical parameter, the Eode can be measured in the laboratory by performing the oedometer tests. In this study, we have performed extensive oedometric tests on five types of anthropogenic materials (AM). Three of them are construction and demolition materials (C-D materials) namely, recycled concrete aggregate (RCA), crushed brick (CB), and recycled asphalt pavement (RAP). Two of them are industrial solid wastes (ISW) namely, fly ash and bottom slag mix (FA + BS) and blast furnace slag (BFS). The results of the tests revealed that AM behaves differently from natural aggregates (NA). In general, the Eode value for AM is lower than for NA with the same gradation. Despite that, some of AM may be used as NA substitute directly (RCA or BFS), some with special treatment like CB and some with extra compaction efforts like RAP or FA + BS.

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