Abstract
This paper examines the partial substitution of concrete components by grinded sea mussel shells collected from the coastal region of eastern Algeria. The study proposes the recycling of this waste to reduce the excessive and increasing accumulation of these shells to relieve the marine environment. The problem lies in establishing a perfect integration of the aggregates obtained from the grinded shells of sea mussels in the formulation of various types of concrete. These substitutions significantly affect the rheology of fresh cementitious materials, which is directly related to the development of strength, modulus of elasticity, and the durability of the hardened material. The objective is to partially replace the mineral sand used in the manufacture of ordinary concrete with shell sand from grinded sea mussels, with different substitution percentages of 20%, 25%, 35%, 40%, and 50% of sand volume. The results obtained indicate a marked improvement in the characteristics of fresh concrete with minimum loss in mechanical performance.
Highlights
Concrete was born out of the need to have an economical building material, malleable at the time of its implementation, and sufficiently resistant when used in the structure
A study conducted by Barbachi [1] on the physical characterization of sea shells for a concrete formulation concluded that the shells of crushed mussels can be candidates as constituents of lightweight concrete
They noted that the shell of the mussel is mainly composed of calcium carbonate CaCo3 at 94.42%, and the other components are organic matter and other minerals in trivial amounts, which results were previously confirmed by Martinez-Garcia [10], who reported about 95 % calcium carbonate
Summary
Concrete was born out of the need to have an economical building material, malleable at the time of its implementation, and sufficiently resistant when used in the structure The optimization of these three parameters to respond to important developments both in terms of architecture and structure has led to excessive consumption of aggregates of mineral origin. Due to the strong presence of industrial and maritime waste in the Skikda region, we were able to conduct research at the Research Unit of Building Materials (RUBM) at the LMGHU Laboratory, University of Skikda, to study the feasibility of the reuse of waste in the field of civil engineering, which normally comes from quarries [3, 6] It is, in the interest of the laboratory team to consider the exploitation of marine waste in the manufacture of concrete as a partial or total alternative to the standard constituents of concrete, as an innovative material. They noted that the shell of the mussel is mainly composed of calcium carbonate CaCo3 at 94.42%, and the other components are organic matter and other minerals in trivial amounts, which results were previously confirmed by Martinez-Garcia [10], who reported about 95 % calcium carbonate
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