Application of Mollusc Seashell as Aggregate in Concrete

Recycling waste materials in cement-based products has been the subject of recent studies on sustainable construction. Large quantities of mollusk seashells are frequently discarded as rubbish along beaches or in landfills, bringing health and environmental problems including as pollution and vector breeding. Mollusc seashell waste is managed by recycling the seashell as a partial or complete replacement for natural aggregate in concrete. Cockle, mussel, oyster, periwinkle, and scallop shells have been utilised as coarse and fine aggregate replacements in concrete. The calcium carbonate content of mollusc seashells is similar to that of limestone-type rocks. Although mollusk seashells contain chlorides, sulphates, and harmful organic materials, their contents can be reduced by washing and boiling. The qualities of mollusc seashell concrete, as well as the treatment, preparation, and features of mollusk seashells, are covered in this chapter. The existing state, limitations, and future potential of mollusk seashell in sustainable concrete building are also discussed. Concrete’s workability, density, and strength qualities all diminish as more seashells are replaced. Crushed seashell can be used as a partial fine aggregate in concrete up to 20% without compromising the density or strength of the concrete. As a result, mollusk seashells can be utilised as a secondary aggregate in concrete, especially in areas where large quantities of seashells are available.

Author(S) Details

Uchechi G. Eziefula
Department of Agricultural and Bio-Environmental Engineering Technology, Imo State Polytechnic, Umuagwo, Nigeria.

David O. Onwuka
Department of Civil Engineering, Federal University of Technology, Owerri, Nigeria.

Hyginus E. Opara
Department of Civil Engineering, Imo State University, Owerri, Nigeria.

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