Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer Grid
Lightweight concrete (LWC) is a long-standing development in the area of construction materials. LWC has become increasingly important for sustainable construction due to its reduced susceptibility to cracking. However, when exposed to extreme temperatures during fires, LWC can lose its compressive...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Fibers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-6439/13/1/7 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832588470633103360 |
|---|---|
| author | Haider M. Al-Baghdadi Mohammed M. Kadhum |
| author_facet | Haider M. Al-Baghdadi Mohammed M. Kadhum |
| author_sort | Haider M. Al-Baghdadi |
| collection | DOAJ |
| description | Lightweight concrete (LWC) is a long-standing development in the area of construction materials. LWC has become increasingly important for sustainable construction due to its reduced susceptibility to cracking. However, when exposed to extreme temperatures during fires, LWC can lose its compressive strength and ductility. This study investigates the performance of lightweight expanded clay aggregate (LECA) concrete T-beams exposed to elevated temperatures. The research also focuses on the use of an engineered cementitious composite with a basalt fiber-reinforced polymer grid (ECCBFG) as a rehabilitation method for fire-damaged T-beams. Key variables considered include the concrete cover thickness (20 and 30 mm), fire exposure duration (30 and 60 min), and thickness of the ECCBFG layer. Thermocouples were installed at various points within the beams to monitor the heat gradient across the cross-section. Fourteen concrete beam specimens were tested, including control beams, fire-damaged beams, and beams strengthened with the ECCBFG layer. Key performance parameters, such as the energy absorption, cracking load, ductility index, maximum load capacity, and corresponding displacement, were analyzed. The experimental results showed that the strengthened beams outperformed the fire-damaged beams, closely matching the performance of undamaged reference beams in most aspects, except energy absorption. The findings suggest that further research is needed to optimize certain performance indicators and address challenges in strengthening fire-damaged beams. |
| format | Article |
| id | doaj-art-2c966e0d9433429bb1e082b2a2f0ff64 |
| institution | Kabale University |
| issn | 2079-6439 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fibers |
| spelling | doaj-art-2c966e0d9433429bb1e082b2a2f0ff642025-01-24T13:32:13ZengMDPI AGFibers2079-64392025-01-01131710.3390/fib13010007Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer GridHaider M. Al-Baghdadi0Mohammed M. Kadhum1Department of Civil Engineering, College of Engineering, University of Babylon, Babylon 51002, IraqDepartment of Civil Engineering, College of Engineering, University of Babylon, Babylon 51002, IraqLightweight concrete (LWC) is a long-standing development in the area of construction materials. LWC has become increasingly important for sustainable construction due to its reduced susceptibility to cracking. However, when exposed to extreme temperatures during fires, LWC can lose its compressive strength and ductility. This study investigates the performance of lightweight expanded clay aggregate (LECA) concrete T-beams exposed to elevated temperatures. The research also focuses on the use of an engineered cementitious composite with a basalt fiber-reinforced polymer grid (ECCBFG) as a rehabilitation method for fire-damaged T-beams. Key variables considered include the concrete cover thickness (20 and 30 mm), fire exposure duration (30 and 60 min), and thickness of the ECCBFG layer. Thermocouples were installed at various points within the beams to monitor the heat gradient across the cross-section. Fourteen concrete beam specimens were tested, including control beams, fire-damaged beams, and beams strengthened with the ECCBFG layer. Key performance parameters, such as the energy absorption, cracking load, ductility index, maximum load capacity, and corresponding displacement, were analyzed. The experimental results showed that the strengthened beams outperformed the fire-damaged beams, closely matching the performance of undamaged reference beams in most aspects, except energy absorption. The findings suggest that further research is needed to optimize certain performance indicators and address challenges in strengthening fire-damaged beams.https://www.mdpi.com/2079-6439/13/1/7lightweight concretelightweight expanded clay aggregateengineered cementitious compositebasalt fiber-reinforced polymer gridfire damage |
| spellingShingle | Haider M. Al-Baghdadi Mohammed M. Kadhum Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer Grid Fibers lightweight concrete lightweight expanded clay aggregate engineered cementitious composite basalt fiber-reinforced polymer grid fire damage |
| title | Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer Grid |
| title_full | Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer Grid |
| title_fullStr | Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer Grid |
| title_full_unstemmed | Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer Grid |
| title_short | Strengthening Fire-Damaged Lightweight Concrete T-Beams Using Engineered Cementitious Composite with Basalt Fiber-Reinforced Polymer Grid |
| title_sort | strengthening fire damaged lightweight concrete t beams using engineered cementitious composite with basalt fiber reinforced polymer grid |
| topic | lightweight concrete lightweight expanded clay aggregate engineered cementitious composite basalt fiber-reinforced polymer grid fire damage |
| url | https://www.mdpi.com/2079-6439/13/1/7 |
| work_keys_str_mv | AT haidermalbaghdadi strengtheningfiredamagedlightweightconcretetbeamsusingengineeredcementitiouscompositewithbasaltfiberreinforcedpolymergrid AT mohammedmkadhum strengtheningfiredamagedlightweightconcretetbeamsusingengineeredcementitiouscompositewithbasaltfiberreinforcedpolymergrid |