Recent advances in green processing technologies for valorisation of eggshell waste for sustainable construction materials

Ngayakamo, Blasius; Onwualu, Azikiwe Peter

doi:10.1016/j.heliyon.2022.e09649

Cited by 35 publications

(6 citation statements)

References 89 publications

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“…Moreover, with a lower water content, there is less excess water to create voids in the concrete. This reduced porosity limits the potential pathways for crack formation, increasing the overall strength of the concrete [53,54]. Additionally, lower w/c ratios often require more efficient curing techniques to prevent the concrete from drying out too quickly.…”

Section: Influence On Compressive Strengthmentioning

confidence: 99%

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Gálvez Cartagena,

Muñoz Araya,

Yanez

et al. 2023

Applied Sciences

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Concrete production requires a significant amount of natural resources, with aggregates comprising between 55% and 80% of the total volume. However, the over-exploitation of natural aggregates has led to the exploration of alternative materials for use in concrete production. In this study, crushed hazelnut shells were investigated as a partial replacement for fine aggregate, addressing the problem of natural resource depletion and offering a second use for this important agricultural waste product available in Chile. Hazelnut shells were incorporated in percentages of 2.5%, 5%, and 10% by weight of sand for water/cement ratios of 0.4 and 0.5. The compressive strength at 7 and 28 days and bending strength at 28 days were determined, alongside physical properties such as the workability, temperature, air content, fresh density, and hardened density of the concrete. Our findings showed that replacing 2.5% of the fine aggregate with hazelnut shells led to a higher compressive strength at 28 days, exceeding the strength of the standard specimens by 9.5%, whereas replacing 5% of the fine aggregate led to the highest bending strength, exceeding the strength of the standard specimens by 3.5%. Moreover, the 0.4 w/c ratio consistently led to better results for both compressive and bending strength, with fewer and lower reductions in mechanical strength compared to the standard mixture. Our results suggest that concrete mixes with hazelnut shells as a replacement for fine aggregate at a percentage of up to 2.5% can be used in construction systems with a compression strength lower than 17 MPa, and mixtures with up to 10% hazelnut shell replacement can be used in structures with tensile bending stress requirements lower than 6 MPa. Overall, the use of hazelnut shells as a partial replacement for fine aggregate in concrete production presents an environmentally friendly and cost-effective solution for the construction industry.

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Section: Influence On Compressive Strengthmentioning

confidence: 99%

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Gálvez Cartagena,

Muñoz Araya,

Yanez

et al. 2023

Applied Sciences

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“…By exploring and utilizing these alternative materials, we can reduce the reliance on natural resources and curb the environmental impact caused by waste disposal [8]. Incorporating egg shell powder and copper slag into construction practices can not only minimize waste but also contribute to more sustainable and eco-friendly building methods [9]. As no one uses copper slag and eggshell powder, the objective of this study is to investigate the compressive strength of concrete containing copper slag and eggshell powder [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of Compressive Strength of Concrete by Partial Replacement of Cement with Egg Shell Powder and Fine Aggregate with Copper Slag

Naxine,

Ghodmare

2024

IOP Conf. Ser.: Earth Environ. Sci.

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The Egg Shell Powder (ESP) is a waste generated from houses and hotels, impacting the environment. This study aims to reuse ESP and Copper Slag in concrete, partially replacing cement and fine aggregate to minimize their use, reduce pollution and ease the burden on natural resources. M20 and M25 grade concrete mixes were prepared with 5% & 7.5% ESP replacement for cement and 40% and 60% Copper Slag replacement for fine aggregate. It is concluded that there was an increase in the compressive strength of concrete with 5% ESP and 40% Copper slag, 5% ESP and 60% Copper slag, and 7.5% ESP and 40% Copper slag when compared to conventional concrete. However, the compressive strength decreased with 7.5% ESP and 60% Copper slag.

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“…Eggshell is a waste material with about 7 million tonnes produced annually all over the world [28]. A small amount of this waste is used as fertilizer, household cleansers, and feed for human and animal supplements.…”

Section: Introductionmentioning

confidence: 99%

One‐Pot Synthesis of ZnO‐Activated Eggshell@kaolinite: Sorbents for Phosphate Capture in Water

Bayode,

Badamasi,

Olusola

et al. 2023

Chem Eng & Technol

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The availability of colossal amounts of phosphate in water bodies has led to serious environmental challenges all over the world. In this study, a new adsorbent was synthesized using treated kaolinite clay, pulverized eggshells, and ZnCl2. Surface characterizationof these adsorbents showed the availability of functional moieties, morphological variations, pore sizes, particle sizes, etc. Adsorption of phosphate occurs via multiple mechanisms, comprising ligand exchange, complexation, hydrogen bonding, and electrostatic interaction, among others. The effect of pH, showed that maximum adsorption of 93.3 % was achieved at pH 3.0. It was also shown that these cost‐effective adsorbents could be regenerated in six cycles, hence increasing their applicability.

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Recent advances in green processing technologies for valorisation of eggshell waste for sustainable construction materials

Cited by 35 publications

References 89 publications

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Influence on Physical and Mechanical Properties of Concrete Using Crushed Hazelnut Shell

Experimental study of Compressive Strength of Concrete by Partial Replacement of Cement with Egg Shell Powder and Fine Aggregate with Copper Slag

One‐Pot Synthesis of ZnO‐Activated Eggshell@kaolinite: Sorbents for Phosphate Capture in Water

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