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Research Article

Strength and durability assessment of laterized concrete made with recycled aggregates: A performance index approach

Chinwuba Arum1, Stephen Adeyemi Alabi1,2, Roland Chinwuba Arum1

1Department of Civil and Environmental Engineering, The Federal University of Technology, Akure, Nigeria

2Department of Civil Engineering, University of Botswana, Gaborone, Botswana

Keywords

Abstract


Lateritic soil; Recycled fine aggregate; Recycled coarse aggregate; Strength; Durability; Performance index

The use of recycled aggregates (RAs) for concrete promotes circular construction while the introduction of lateritic soil (LS) seeks cost reduction in concrete production. This study reports the results of experiments on partial replacement of (i) Akure-pit sand (APS) with recycled fine aggregate (RFA); (ii) RFA with LS; (iii) APS with LS; and (iv) crushed granite (CG) with recycled coarse aggregate (RCA). Replacement levels were from 0% to 70% in steps of 10%. Major tests were compressive strength and sorptivity. The performance index approach was employed to obtain the best performance indices for various material combinations. The results revealed that at 28 days of curing, concretes attained optimum compressive strengths of 15 N/mm2, 15.1 N/mm2, 13.1 N/mm2, and 16.8 N/mm2, respectively for mixtures produced by partially substituting APS with 70%RFA; RFA with 40%LS; APS with 50%LS; and CG with 50%RCA. The sorptivity was optimal at 2.69x10-4 mm/min0.5; 3.58x10-4 mm/min0.5; 3.16x10-4 mm/min0.5; and 2.86x10-4 mm/min0.5, respectively for mixtures with partial replacement of APS with 30%RFA; RFA with 40%LS; APS with 40%LS; and CG with 10%RCA. This research will find practical application in construction works utilizing LS and RAs when optimal replacement levels of the conventional aggregates are required, in order to achieve predetermined performance criteria.

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2023 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.



2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.



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The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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