Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates
The paper reports on a research program that was designed at the American University of Beirut (AUB) to investigate the fresh and hardened mechanical properties of a high performance concrete mix produced with partial or full substitution of crushed natural lime-stone aggregates with recycled aggreg...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509517301626 |
| _version_ | 1818481560635047936 |
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| author | Bilal S. Hamad Ali H. Dawi |
| author_facet | Bilal S. Hamad Ali H. Dawi |
| author_sort | Bilal S. Hamad |
| collection | DOAJ |
| description | The paper reports on a research program that was designed at the American University of Beirut (AUB) to investigate the fresh and hardened mechanical properties of a high performance concrete mix produced with partial or full substitution of crushed natural lime-stone aggregates with recycled aggregates from crushed tested cylinders in batching plants. Choosing crushed cylinders as source of recycling would result in reusing portion of the waste products of the concrete production industry. An extensive concrete batching and testing program was conducted to achieve two optimum normal and high strength concrete mixes. The variables were the nominal concrete strength (28 or 60 MPa) and the percentage replacement of natural coarse aggregates with recycled aggregates from crushed tested cylinders (0, 20, 40, 60, 80, or 100%). Normal strength tested cylinders were used as source of the recycled aggregates for the normal strength concrete (NSC) mix and high strength tested cylinders were used for the high strength concrete (HSC) mix. Tests on the trial batches included plastic state slump and hardened state mechanical properties including cylinder compressive strength, cylinder splitting tensile strength, modulus of elasticity, and standard beams flexural strength. The results indicated no significant effect on the slump and around 10% average reduction in the hardened mechanical properties for both investigated levels of concrete compressive strength. |
| first_indexed | 2024-12-10T11:36:36Z |
| format | Article |
| id | doaj.art-4cf54af7cba34687af863d133f9c7850 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-10T11:36:36Z |
| publishDate | 2017-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-4cf54af7cba34687af863d133f9c78502022-12-22T01:50:25ZengElsevierCase Studies in Construction Materials2214-50952017-12-017C22823910.1016/j.cscm.2017.08.006Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregatesBilal S. Hamad0Ali H. Dawi1Department of Civil and Environmental Engineering, American University of Beirut (AUB), P.O. Box: 11-0236, Riad El-Solh, 1107 2020 Beirut, LebanonAmerican University of Beirut, Beirut, LebanonThe paper reports on a research program that was designed at the American University of Beirut (AUB) to investigate the fresh and hardened mechanical properties of a high performance concrete mix produced with partial or full substitution of crushed natural lime-stone aggregates with recycled aggregates from crushed tested cylinders in batching plants. Choosing crushed cylinders as source of recycling would result in reusing portion of the waste products of the concrete production industry. An extensive concrete batching and testing program was conducted to achieve two optimum normal and high strength concrete mixes. The variables were the nominal concrete strength (28 or 60 MPa) and the percentage replacement of natural coarse aggregates with recycled aggregates from crushed tested cylinders (0, 20, 40, 60, 80, or 100%). Normal strength tested cylinders were used as source of the recycled aggregates for the normal strength concrete (NSC) mix and high strength tested cylinders were used for the high strength concrete (HSC) mix. Tests on the trial batches included plastic state slump and hardened state mechanical properties including cylinder compressive strength, cylinder splitting tensile strength, modulus of elasticity, and standard beams flexural strength. The results indicated no significant effect on the slump and around 10% average reduction in the hardened mechanical properties for both investigated levels of concrete compressive strength.http://www.sciencedirect.com/science/article/pii/S2214509517301626Recycled aggregate concrete (RAC)Sustainable materialsNormal strength concrete (NSC)High strength concrete (HSC)Construction industry |
| spellingShingle | Bilal S. Hamad Ali H. Dawi Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates Case Studies in Construction Materials Recycled aggregate concrete (RAC) Sustainable materials Normal strength concrete (NSC) High strength concrete (HSC) Construction industry |
| title | Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates |
| title_full | Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates |
| title_fullStr | Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates |
| title_full_unstemmed | Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates |
| title_short | Sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates |
| title_sort | sustainable normal and high strength recycled aggregate concretes using crushed tested cylinders as coarse aggregates |
| topic | Recycled aggregate concrete (RAC) Sustainable materials Normal strength concrete (NSC) High strength concrete (HSC) Construction industry |
| url | http://www.sciencedirect.com/science/article/pii/S2214509517301626 |
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