Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams
Currently, the use of recycled aggregates (RA) in new concrete is allowed by several international regulations, although their replacement is limited to low percentages of the coarse fraction. In order to increase the percentage of RA, several authors have studied different processes to improve the...
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2025-01-01
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| author | Catalina Martínez Viviana Letelier Bruno Wenzel |
| author_facet | Catalina Martínez Viviana Letelier Bruno Wenzel |
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| description | Currently, the use of recycled aggregates (RA) in new concrete is allowed by several international regulations, although their replacement is limited to low percentages of the coarse fraction. In order to increase the percentage of RA, several authors have studied different processes to improve the microstructure of its surface. Therefore, it is necessary to analyze whether the current standards simulate the structural behavior of concretes with high percentages of RA. For this purpose, beams with 0%, 50% and 100% RA replacement coated with recycled binder paste (RBP) were made and their behavior was compared with the equations of the Eurocode 2 and ACI 318-19 code. As a result, we found that when 100% coated RA was used, the reduction in compressive strength was only 12.73%, with similar cracking patterns observed in RA beams across all series. In addition, the load capacity of the beams with RA was higher than the theoretical values provided by the codes. Finally, the experimental critical deflection was higher than that calculated by the code equations. Thus, it is recommended that these higher deflections be taken into account at the time of design. |
| format | Article |
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| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-129fcf5db4e04b72a567b4f9eded8da72025-01-24T13:20:59ZengMDPI AGApplied Sciences2076-34172025-01-0115282910.3390/app15020829Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete BeamsCatalina Martínez0Viviana Letelier1Bruno Wenzel2Department of Civil Engineering, Universidad de La Frontera, Temuco 4811230, ChileDepartment of Civil Engineering, Universidad de La Frontera, Temuco 4811230, ChileDepartment of Civil Engineering, Universidad de La Frontera, Temuco 4811230, ChileCurrently, the use of recycled aggregates (RA) in new concrete is allowed by several international regulations, although their replacement is limited to low percentages of the coarse fraction. In order to increase the percentage of RA, several authors have studied different processes to improve the microstructure of its surface. Therefore, it is necessary to analyze whether the current standards simulate the structural behavior of concretes with high percentages of RA. For this purpose, beams with 0%, 50% and 100% RA replacement coated with recycled binder paste (RBP) were made and their behavior was compared with the equations of the Eurocode 2 and ACI 318-19 code. As a result, we found that when 100% coated RA was used, the reduction in compressive strength was only 12.73%, with similar cracking patterns observed in RA beams across all series. In addition, the load capacity of the beams with RA was higher than the theoretical values provided by the codes. Finally, the experimental critical deflection was higher than that calculated by the code equations. Thus, it is recommended that these higher deflections be taken into account at the time of design.https://www.mdpi.com/2076-3417/15/2/829recycled aggregatesreinforced concrete beamscracking analysisultimate failure loadexperimental and theoretical study |
| spellingShingle | Catalina Martínez Viviana Letelier Bruno Wenzel Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams Applied Sciences recycled aggregates reinforced concrete beams cracking analysis ultimate failure load experimental and theoretical study |
| title | Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams |
| title_full | Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams |
| title_fullStr | Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams |
| title_full_unstemmed | Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams |
| title_short | Effect of High Percentages of Coated Recycled Aggregates on the Flexural Behavior of Reinforced Concrete Beams |
| title_sort | effect of high percentages of coated recycled aggregates on the flexural behavior of reinforced concrete beams |
| topic | recycled aggregates reinforced concrete beams cracking analysis ultimate failure load experimental and theoretical study |
| url | https://www.mdpi.com/2076-3417/15/2/829 |
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