ArticleScientific reports2025
Impact of modified aggregate gradation on the workability, mechanical, microstructural and radiation shielding properties of recycled aggregate concrete.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Sustainable Concrete Production Using Granodiorite, Alkali Feldspar Granite, and Mafic Metavolcanic Rock Powders as Supplementary Cementitious Materials.Materials (Basel, Switzerland) · 2026Article
- Predicting compressive strength of mortars containing recycled CRT glass using GMDH and GEP methods.Scientific reports · 2026Article
- Mechanical and radiation shielding assessment of high-density/magnetite-cementitious plaster for repair and retrofit of nuclear power plant structures.Scientific reports · 2026Article
- Dual-function polyurethane-based CdO- BScientific reports · 2025Article
- Mechanical, microstructural, and radiation shielding characteristics of sustainable high-strength concrete incorporating recycled wastes blended powders.Scientific reports · 2025Article
- Effective of prompt and delayed gamma emission on the nuclear radiation shielding effectiveness of prevalent natural minerals.Scientific reports · 2025Article
- Concrete Obtained with the Viterbo O'Reilly Method for Aggregate Gradation: A Potential Model for Sustainable Design and Reducing Development Costs.Materials (Basel, Switzerland) · 2025Article
- Evaluation of rice husk biochar influence as a partial cement replacement material on the physical, mechanical, microstructural, and radiation shielding properties of ordinary concrete.Scientific reports · 2025Article
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Authors and funding
7 authors.
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Abstract
The increasing need for sustainable construction practices has driven research into the utilization of recycled concrete aggregate (RCA) in new concrete mixes. However, the variable properties of RCA, particularly its gradation, can significantly impact the performance of the resulting concrete. This study investigates the impact of modified aggregate gradation on the properties of concrete incorporating 100% RCA. Three concrete mixes were prepared: a control mix with the original RCA gradation (RCA1) and two modified mixes (RCA2 and RCA3). The initial gradation was modified by enhancing the 10% passing the #1″ sieve (S1) and diminishing the combined 10% passing the #1″ sieve and 10% passing the #4″ sieve (S2). Subsequently, the effects of these modified gradations were assessed, encompassing workability, mechanical properties (compressive and flexural strength), microstructural characteristics (XRD, SEM, and EDX), and radiation shielding performance. Results demonstrate that, despite reduced workability, the modified mixes exhibited enhanced compressive and flexural strengths. Microstructural analysis revealed denser, more interconnected cement paste matrices and refined interfacial transition zones (ITZ) in the modified mixes. Furthermore, the radiation shielding effectiveness increased with increasing gradation modification (RCA1 < RCA2 < RCA3). Specifically, RCA3 exhibited the lowest half-value layer (HV), tenth-value layer (TV), and mean free path (MF), along with the highest average macroscopic removal cross-section (FCS). These results suggest that modifying the gradation of RCA can effectively improve the mechanical and radiation shielding properties of concrete made with 100% RCA. This enhanced performance makes RCA concrete a viable option for radiation shielding applications in facilities like hospitals and nuclear power plants, contributing to both sustainable construction and improved safety.
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