Effect of recycled seashells on concrete properties: A comprehensive review of the recent studies

Hamada, Hussein M.; Abed, Farid; Tayeh, Bassam A.; Jawahery, Mohammed S. Al; Majdi, Ali; Yousif, Salim T.

doi:10.1016/j.conbuildmat.2023.131036

Cited by 18 publications

(9 citation statements)

References 92 publications

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“…Seashell waste has garnered interest as a potential sustainable construction material due to its high calcium carbonate content, which is a key component of traditional cement [13]. Research has shown that when seashell waste is finely ground into powder and used as a partial replacement for cement, it can improve workability and durability properties of mortar mixtures [14,15]. Moreover, the utilization of seashell waste offers a dual benefit by addressing waste management issues associated with the seafood industry.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on sustainable mortar containing recycled seashell powder as cement partial replacement

Ahmed,

Chávez-Delgado,

Avudaiappan

2024

Eng. Res. Express

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Creating sustainable mortar containing recycled seashells is an innovative approach that can contribute to environmental conservation and reduce waste. The use of seashells as a partial replacement for traditional raw materials in mortar can have several benefits, including conservation of natural resources, waste reduction, and improved material properties. The current study uses Marsh Clam seashells after crushing the cleaned seashells into powder. Heated ( up to 600Co) and unheated seashells were considered in the experimental investigation. In both batches, a seashell powder (heated and unheated) was replaced with OPC cement in proportions of 6, 9 and 12% in the mixing process. XRD, SEM, EDS and mechanical tests were employed to determine the crystal structure and to provide a comprehensive understanding of the physical, chemical, and structural characteristics of the substance. The study concluded that the calcium carbonate (CaCO3) that is nature chemical form of seashells was turned to calcium oxide (CaO) during the heating process and the resulted product was highly reactive with water, improved microstructural properties of the concrete. It also promotes better particle packing, reduce porosity, and create a denser, more uniform concrete matrix and enhancing the overall performance of the material.

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Section: Introductionmentioning

confidence: 99%

Experimental investigations on sustainable mortar containing recycled seashell powder as cement partial replacement

Ahmed,

Chávez-Delgado,

Avudaiappan

2024

Eng. Res. Express

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“…There is a significant variation in the reported CaO content across different studies, ranging from 48.0% to 95.82%. This difference is related to the origin and species of the mollusk (Hamada et al, 2023). The LOI, which ranges from 23.2% to 51.0%, is attributed to the presence of calcite, which decomposes into calcium oxide and carbon dioxide at high temperatures (Mo et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Recent research has increasingly focused on the potential of using recycled mollusk shells in concrete mixtures, either as a substitute for aggregates or as an additive to Portland cement (Oyejobi et al, 2019;Rodríguez-Galán et al, 2019;Edalat-Behbahani et al, 2021;El Biriane and Barbachi, 2021;Her et al, 2021;Leone et al, 2023). This recycling approach offers two significant advantages (Hamada et al, 2023): firstly, it mitigates environmental pollution by reducing the volume of waste that accumulates in open spaces and landfills. Secondly, its use as a replacement for aggregates and/or cement mitigates the environmental impact of cement production, characterized by substantial CO₂ emissions.…”

Section: Introductionmentioning

confidence: 99%

“…However, in both studies, the samples incorporating shells exhibited acceptable strengths, exceeding 25 MPa after 28 days of curing. A recent literature review by Hamada et al (2023) highlighted a discrepancy in mechanical strengths across studies utilizing seashells as filler material. Nonetheless, high levels of cement replacement with seashells reduce the concrete's compressive, tensile, and flexural strengths.…”

Section: Introductionmentioning

confidence: 99%

“…It is noteworthy that none of the mentioned studies or literature reviews on the subject (Eziefula et al, 2018;Mo et al, 2018;Tayeh et al, 2019;Bamigboye et al, 2021;Hamada et al, 2023) have investigated the use of sururu shells, a mollusk commonly fished in some Latin American and Asian countries. Furthermore, it is evident that different types of seashells can produce different mechanical properties in cementitious systems.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating Sururu shell waste (Mytella falcata) as an eco-friendly recycled aggregate in mortar production

Cardoso,

Kohlman Rabbani,

Silva

et al. 2024

Front. Built Environ.

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Introduction: Improper disposal of mollusk shells has led to environmental issues worldwide. Given their primary composition of calcium carbonate, these shells have been studied for their potential use as aggregate in cement composites, offering an environmentally appropriate destination for the waste and reducing virgin raw material use. However, there is a lack of research on the application of Sururu (Mytella falcata) shells, a species of mollusk commonly fished in countries such as Brazil. This study investigated the effects of Sururu shells waste from a Brazilian region on the mechanical and physical properties of mortar when partially replacing natural fine aggregate.Methods: Three mortar mixtures were produced, replacing 10, 20, and 40% of natural sand with Sururu shell aggregate (SSA) by mass. The specimens underwent consistency and density tests in their fresh state, and compressive strength, dynamic modulus of elasticity, and capillary absorption tests in their hardened state.Results: The results showed that workability decreased with the increase in SSA replacement, resulting in a reduction of 31.5% in consistency at 40% SSA replacement level. Compressive strength also decreased with SSA incorporation, but all samples continued to gain strength after 28 days, with 10% SSA samples showing only a 2.7% reduction compared to the control specimens. The dynamic modulus of elasticity was minimally impacted at 10% SSA, but significantly reduced at higher levels. Notably, SSA reduced capillary absorption in samples after 24, 48, and 72 h, indicating potential benefits in moisture management.Discussion: It was concluded that replacing 10% of natural sand with SSA was the most suitable option, considering the investigated mechanical properties of the mortar produced with SSA. However, further research is recommended to examine the durability and environmental impact of this solution.

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Assessing the mechanical, durability, thermal and microstructural properties of sea shell ash based lightweight foamed concrete

Maglad,

Othuman Mydin,

Dip Datta

et al. 2023

Construction and Building Materials

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Effect of recycled seashells on concrete properties: A comprehensive review of the recent studies

Cited by 18 publications

References 92 publications

Experimental investigations on sustainable mortar containing recycled seashell powder as cement partial replacement

Experimental investigations on sustainable mortar containing recycled seashell powder as cement partial replacement

Evaluating Sururu shell waste (Mytella falcata) as an eco-friendly recycled aggregate in mortar production

Assessing the mechanical, durability, thermal and microstructural properties of sea shell ash based lightweight foamed concrete

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