Flexural strengthening of LWRC beams using RSHCC reinforced with glass fiber textile mesh

This study aims to explore the flexural behavior of crushed clay brick (CCB) lightweight concrete (LWC) beams strengthened with rubberized strain-hardening cementitious composite reinforced with glass fiber textile mesh layers (GFTM-RSHCC) at the tension side. For this purpose, an experimental inves...

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Bibliographic Details
Published in:Journal of engineering and applied science (Online) 2024-12, Vol.71 (1), p.132-20
Main Authors: Issa, Mohamed E., El-Shafey, Nasser F., Baraghith, Ahmed T., Balat, Ehab N.
Format: Article
Language:English
Subjects:
Aggregates
Carbon fibers
Cement
Civil Engineering
Composite materials
Concrete mixing
Construction industry
Crushed clay brick
Ductility
Electrical Engineering
Engineering
Engineering Mathematics
Flexural
Glass fiber textile mesh
Glass fibers
Green buildings
Industrial Chemistry/Chemical Engineering
Lightweight concretes
LWRC beams
Manufacturers
Mechanical Engineering
Mechanical properties
Reinforced concrete
Rubber
Rubberized strain-hardening cementitious composite
Strain hardening
Strengthening
Sustainable materials
Thickness
Ultimate loads
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Summary:This study aims to explore the flexural behavior of crushed clay brick (CCB) lightweight concrete (LWC) beams strengthened with rubberized strain-hardening cementitious composite reinforced with glass fiber textile mesh layers (GFTM-RSHCC) at the tension side. For this purpose, an experimental investigation consisting of seven simply supported beams, including one un-strengthened specimen, was produced and tested using a monotonic 4-point loading scheme. All specimens had a 120 × 250 mm cross-section, a total length of 2400 mm, and a loaded span of 2200 mm. The studied parameters were the number of GFTM inside the RSHCC (1, 2, or 3) and the thickness of GFTM-RSHCC layer (30 or 40 mm). All the following aspects were tracked: crack pattern, ultimate load, mid-span defection, and ductility. The results show that increasing the number of layers of GFTM and the thickness of RSHCC generally leads to an increase in the ultimate loads and ductility, up to 68% and 83%, respectively, compared to the control beam. Finally, a proposed equation considering the contribution of the GFTM-RSHCC layer was developed to predict the flexural capacity of the strengthened beams. The proposed equation showed good agreement with the experimental results.
ISSN:1110-1903
2536-9512
DOI:10.1186/s44147-024-00467-x