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Related Experiment Videos

Oyster shell as substitute for aggregate in mortar.

Hyunsuk Yoon1, Sangkyu Park, Kiho Lee

  • 1School of Civil, Urban & Geosystem Engineering, Seoul National University, Seoul, Korea.

Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA
|July 16, 2004
PubMed
Summary

Recycled oyster shells can substitute sand in mortar without significantly reducing compressive strength. This study verifies oyster shell waste

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Area of Science:

  • Materials Science
  • Civil Engineering
  • Environmental Science

Background:

  • Oyster shell waste poses an environmental challenge due to illegal disposal at Korean aquaculture sites.
  • Recycling this waste into construction materials offers a sustainable solution.

Purpose of the Study:

  • To investigate the mechanical properties of pulverized oyster shells for use as aggregate in mortar.
  • To evaluate oyster shells as a viable substitute for sand in cement mortar.
  • To assess the impact of organic compounds and fly ash on mortar strength.

Main Methods:

  • Unconfined compression tests were performed on mortar specimens with varying ratios of cement, water, and pulverized oyster shell.
  • Mortar specimens mixed with ethyl benzene were tested to evaluate organic chemical effects.

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  • Long-term strength was examined by incorporating fly ash into the mortar mix.

    • Main Results:

    • Mortars incorporating oyster shell particles showed no significant reduction in compressive strength compared to sand-based mortar.
    • The presence of organic compounds like ethyl benzene affected mortar hardening.
    • Fly ash addition contributed to long-term strength improvement in the oyster shell mortar.

    Conclusions:

    • Pulverized oyster shells are a viable construction material, suitable as a partial or full replacement for sand in mortar.
    • The study confirms the potential for oyster shell waste recycling in the construction industry.
    • Further research is needed to fully understand the influence of organic contaminants on long-term performance.