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A platform for research: civil engineering, architecture and urbanism
Physical-mechanical behavior of workable mortars with Perna perna mussel shell as fine aggregate
Abstract Cultivation of mussels stands as a significant economic activity in coastal regions Brazil. Often disregarded as waste, mussel shells (MS) possess properties that can be harnessed in the production of building materials. This study explores the utilization of large amounts of Perna perna MS as fine aggregates for the production of fluid mortars. Key parameters such as compressive strength, bulk density, water absorption and void ratio were evaluated. Specimens were prepared according to a full factorial design, with variations of MS content (%MS) (45 to 65 vol%) and water-to-cement (w/c) ratio (0.40 to 0.50). The resulting fluid mortars exhibited satisfactory strength, minimal segregation, and low void content with compactness at the aggregate-cement paste interface. The increase in %MS contributed to higher mortar bulk density but led to reduced void ratio, compressive strength, and workability. The incorporation of a superplasticizer (SP) significantly improved the matrix by enhancing the dispersion of cement particles, mitigating the adverse effects of reduced cementitious material, and enhancing strength. The influence of w/c on compressive strength was found to be 1.6 times greater than that for %MS, while its impact on void ratio was 0.5 times smaller. The full factorial model effectively predicted the mix design for MS-added mortars, yielding strengths ranging from 12 to 21 MPa and void ratios from 21 to 34%.
Graphical Abstract Display Omitted
Highlights Workable mortars with exclusive utilization of Perna perna mussel shells (MS) as fine aggregate. Increasing %MS reduces compressive strength but increases bulk density. w/c exerts 1.6 times greater effect on compressive strength reduction than %MS. w/c has an antagonistic effect on void ratio, exerting − 0.5 times the influence compared to %MS. Fresh mortar fluidity promotes microstructural compactness and improve properties.
Physical-mechanical behavior of workable mortars with Perna perna mussel shell as fine aggregate
Abstract Cultivation of mussels stands as a significant economic activity in coastal regions Brazil. Often disregarded as waste, mussel shells (MS) possess properties that can be harnessed in the production of building materials. This study explores the utilization of large amounts of Perna perna MS as fine aggregates for the production of fluid mortars. Key parameters such as compressive strength, bulk density, water absorption and void ratio were evaluated. Specimens were prepared according to a full factorial design, with variations of MS content (%MS) (45 to 65 vol%) and water-to-cement (w/c) ratio (0.40 to 0.50). The resulting fluid mortars exhibited satisfactory strength, minimal segregation, and low void content with compactness at the aggregate-cement paste interface. The increase in %MS contributed to higher mortar bulk density but led to reduced void ratio, compressive strength, and workability. The incorporation of a superplasticizer (SP) significantly improved the matrix by enhancing the dispersion of cement particles, mitigating the adverse effects of reduced cementitious material, and enhancing strength. The influence of w/c on compressive strength was found to be 1.6 times greater than that for %MS, while its impact on void ratio was 0.5 times smaller. The full factorial model effectively predicted the mix design for MS-added mortars, yielding strengths ranging from 12 to 21 MPa and void ratios from 21 to 34%.
Graphical Abstract Display Omitted
Highlights Workable mortars with exclusive utilization of Perna perna mussel shells (MS) as fine aggregate. Increasing %MS reduces compressive strength but increases bulk density. w/c exerts 1.6 times greater effect on compressive strength reduction than %MS. w/c has an antagonistic effect on void ratio, exerting − 0.5 times the influence compared to %MS. Fresh mortar fluidity promotes microstructural compactness and improve properties.
Physical-mechanical behavior of workable mortars with Perna perna mussel shell as fine aggregate
Artismo, Thaynã Vilasboa (author) / Braga, Fábio de Oliveira (author) / Rocha, Camila Aparecida Abelha (author)
2024-02-08
Article (Journal)
Electronic Resource
English
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