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Related Experiment Videos

Extended phase relations and load effects in MSW.

J R McDougall1, I C Pyrah, S T S Yuen

  • 1School of Built Environment, Napier University, 10 Colinton Road, Edinburgh, Scotland, EH10 5DT UK. j.mcdougall@napier.ac.uk

Waste Management (New York, N.Y.)
|March 16, 2004
PubMed
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This study models municipal solid waste (MSW) compression like unsaturated soil, revealing how moisture and density change with depth. Findings offer insights into waste behavior under low stress conditions.

Area of Science:

  • Geotechnical Engineering
  • Environmental Engineering
  • Waste Management

Background:

  • Municipal solid waste (MSW) exhibits complex behavior under self-weight loading.
  • Understanding moisture retention and compression is crucial for landfill design and management.

Purpose of the Study:

  • To develop a material model for municipal solid waste (MSW) behavior under self-weight compression.
  • To investigate the variation of density and moisture content with depth in landfills.
  • To analyze waste compression characteristics at low confining stresses.

Main Methods:

  • Analogizing MSW to unsaturated soil mechanics principles.
  • Developing a four-phase material model incorporating solid organic, solid inorganic, water, and air.
  • Utilizing detailed moisture and waste composition data from the Lyndhurst Sanitary Landfill.

Related Experiment Videos

  • Comparing model predictions with large-scale compression test results.

    • Main Results:

    • The model provides insights into density and moisture variations with depth.
    • Deformation at low stress is linked to the macropore system.
    • Micropore moisture in the solid organic fraction is relatively immobile.
    • Model validation against experimental data confirms its applicability.

    Conclusions:

    • The developed model effectively captures the behavior of MSW under self-weight.
    • The findings enhance understanding of waste compression and moisture dynamics in landfills.
    • This research contributes to improved landfill engineering practices.