The Impact of High Temperatures on the Strength of Recycled Aggregate Concrete
The recent study share out the fabrication of Recycled Aggregate Concrete (RAC) and studying the influence of exposure to high temperatures on the density and compressive strength. RAC mixes were prepared using (1: 2: 4) cement: sand: coarse aggregate (recycled aggregate 50 wt%.), water/cement (0.5)...
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EDP Sciences
2025-01-01
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| Series: | E3S Web of Conferences |
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| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/21/e3sconf_icgest2025_01009.pdf |
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| author | Kamal Ibtisam Ali Abed Ammar |
| author_facet | Kamal Ibtisam Ali Abed Ammar |
| author_sort | Kamal Ibtisam |
| collection | DOAJ |
| description | The recent study share out the fabrication of Recycled Aggregate Concrete (RAC) and studying the influence of exposure to high temperatures on the density and compressive strength. RAC mixes were prepared using (1: 2: 4) cement: sand: coarse aggregate (recycled aggregate 50 wt%.), water/cement (0.5). RAC cubes of 150mm x 150mm x 150mm were cast and appropriately cured for 28 days according to standard procedure. The impact of elevated temperature on the compressive strength and density of RACs was investigated using an adopted central composite design of two factorials (temperature: 69.3-210.7oC and heating time: 4.7-6.8 h) based on Response Surface Methodology. An optimum of 32.48 % and 3.09 % reduction in average compressive strength and density respectively were estimated from ANOVA analysis when exposed to an optimum temperature of 217.7oC and heating time of 6.8 hours. The mathematical models presenting the impact of high temperature on the investigated characteristics were estimated and validated. For design considerations, it is very necessary to have information about the RACs fabricated as construction materials before their utilization as structural elements. Also, the exploration into the high-temperature performance of RACs is vital to the conservation of life and economics in fire crises. |
| format | Article |
| id | doaj-art-d37b622e905f47358b387ef01f5587f1 |
| institution | DOAJ |
| issn | 2267-1242 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj-art-d37b622e905f47358b387ef01f5587f12025-08-20T03:07:01ZengEDP SciencesE3S Web of Conferences2267-12422025-01-016210100910.1051/e3sconf/202562101009e3sconf_icgest2025_01009The Impact of High Temperatures on the Strength of Recycled Aggregate ConcreteKamal Ibtisam0Ali Abed Ammar1Petroleum Engineering Department, Alfarqadein University CollegePorts Institute, General Company for Ports of IraqThe recent study share out the fabrication of Recycled Aggregate Concrete (RAC) and studying the influence of exposure to high temperatures on the density and compressive strength. RAC mixes were prepared using (1: 2: 4) cement: sand: coarse aggregate (recycled aggregate 50 wt%.), water/cement (0.5). RAC cubes of 150mm x 150mm x 150mm were cast and appropriately cured for 28 days according to standard procedure. The impact of elevated temperature on the compressive strength and density of RACs was investigated using an adopted central composite design of two factorials (temperature: 69.3-210.7oC and heating time: 4.7-6.8 h) based on Response Surface Methodology. An optimum of 32.48 % and 3.09 % reduction in average compressive strength and density respectively were estimated from ANOVA analysis when exposed to an optimum temperature of 217.7oC and heating time of 6.8 hours. The mathematical models presenting the impact of high temperature on the investigated characteristics were estimated and validated. For design considerations, it is very necessary to have information about the RACs fabricated as construction materials before their utilization as structural elements. Also, the exploration into the high-temperature performance of RACs is vital to the conservation of life and economics in fire crises.https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/21/e3sconf_icgest2025_01009.pdfrecycled aggregate concretecompressive strengthdensityoptimizationmodeling |
| spellingShingle | Kamal Ibtisam Ali Abed Ammar The Impact of High Temperatures on the Strength of Recycled Aggregate Concrete E3S Web of Conferences recycled aggregate concrete compressive strength density optimization modeling |
| title | The Impact of High Temperatures on the Strength of Recycled Aggregate Concrete |
| title_full | The Impact of High Temperatures on the Strength of Recycled Aggregate Concrete |
| title_fullStr | The Impact of High Temperatures on the Strength of Recycled Aggregate Concrete |
| title_full_unstemmed | The Impact of High Temperatures on the Strength of Recycled Aggregate Concrete |
| title_short | The Impact of High Temperatures on the Strength of Recycled Aggregate Concrete |
| title_sort | impact of high temperatures on the strength of recycled aggregate concrete |
| topic | recycled aggregate concrete compressive strength density optimization modeling |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/21/e3sconf_icgest2025_01009.pdf |
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