Flexural Behaviour of Lightweight Foamed Concrete Beams Reinforced with GFRP Bars

Suhad, M.; Ghalib, Dhamyaa

doi:10.28991/cej-030991

Cited by 17 publications

(3 citation statements)

References 11 publications

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“…Moreover, lightweight FC strengthened with glass fibre reinforced polymer (GFRP) bars was investigated and associated with normal concrete beams [166]. It was discovered that lightweight FC has a 3.6% increment of load capacity without reinforcement and an 11.54% increase in GFRP than steel reinforcement.…”

Section: Steel and Frp Rfc Jones And Mccarthymentioning

confidence: 99%

Design Efficiency, Characteristics, and Utilization of Reinforced Foamed Concrete: A Review

et al. 2020

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Foam concrete (FC) serves as an efficient construction material that combines well thermal insulation and structural properties. The studies of material characteristics, including the mechanical, physical, rheological, and functional properties of lightweight concrete, have been conducted rigorously. However, a lack of knowledge on the design efficiency of reinforced FC (RFC) was found in current research trends, compared to reinforced lightweight aggregate concrete. Therefore, this paper presents a review of the performance and adaption in structures for RFC. According to the code specifications, the feasibility investigation was preliminarily determined in structural use through the summary for the mechanical properties of FC of FC’s mechanical properties. For reinforced concrete design, a direct method of reduction factors is introduced to design lightweight aggregate concrete, which is also suggested to be adapted into a lightweight FC design. It was found that flexural shear behavior is a more complex theoretical analysis than flexure. However, a reduction factor of 0.75 was recommended for shear, torsion, and compression; meanwhile, 0.6 for flexural members. Serviceability limit states design should be applied, as the crack was found predominant in RFC design. The deflection controls were recommended as 0.7 by previous research. Research on RFC’s compression members, such as a column or load load-bearing wall, were rarely found. Thus, further study for validating a safe design of RFC applications in construction industries today is highly imperative.

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Section: Steel and Frp Rfc Jones And Mccarthymentioning

confidence: 99%

Design Efficiency, Characteristics, and Utilization of Reinforced Foamed Concrete: A Review

et al. 2020

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“…An investigation conducted by Abd and Ghalib [7] focused on analyzing four reinforced concrete beams comprising two foamed concrete beams and two normal-weight concrete beams with dimensions of 200 × 250 × 1500 mm. Te density aimed for the lightweight foamed concrete beams was 1800 kg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

Behavior of Reinforced Composite Foamed-Normal Concrete Beams

Jaffal,

Hilal,

Mahmoud

2023

Journal of Engineering

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A study has been undertaken to investigate the production and behavior of beams made with foamed, normal, and composite concrete and reinforced with different steel percentages (under, balanced, and over). Nine reinforcement beams, including three normal-weight concrete, three lightweight foamed concrete, and three composite concrete, were made with similar rectangular cross sections of dimensions (150 × 250 mm) and length of 1500 mm. A 28-day compressive strength of 29 MPa (suitable for structural purposes) was achieved for all investigated concrete mixes. Ultimate load, crack mode, ductility, deflection, and stiffness as flexural parameters were investigated. The results showed that in terms of loading, the load of composite concrete beams was equal to that of normal concrete beams, and a slight increase in the lightweight foamed concrete beams was noticed. The ductility of foamed concrete beams with balanced reinforcement and under reinforcing was lower than that of normal concrete. In the case of the over-reinforcement beams, the ductility of foamed concrete beam increased by about 19.5% compared to that of normal reinforced concrete. In addition, the ductility and stiffness of composite concrete beams increased by about 91.7% and 5.6% compared to normal beams and 61% and 15.1% compared to foamed concrete beams, respectively.

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“…By comparing lightweight foamed concrete reinforced with GFRP bars to normal concrete beams it was found that the increase in the load capacity for lightweight foamed concrete is 3.6% of the load capacity for normal concrete beams. By comparing lightweight foamed concrete beams reinforced with GFRP bars, it was found that the increase in the load capacity for beam reinforced with GFRP is 11.54% of the load capacity for beams reinforced with steel bars [8]. Lee et al (2017) investigated seven beams of lightly foamed mortar and three beams of normal weight concrete as control samples, the experimental results of the flexural behavior of beams and reinforced concrete slabs made of lightweight foamed mortar with a density ranging from 1700-1800 kg/m 3 , show that light foamed mortar beams can withstand ultimate loads about 8 to 34% lower than normal weight reinforced concrete with the same reinforcing configuration [9].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Normal and Lightweight Concrete Composite Beams

et al. 2021

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This paper presents an experimental study of the behavior of Normal Concrete Beams (NCB) and composite beams with lightweight foamed concrete (CB), reinforced with steel bar measuring 2 f 8 mm in the compressive section and 2 D 16 mm in the tensile section, shear steel bar f 8 mm. The sample consisted of two normal concrete beams (NCB) and two composite beams with lightweight foamed concrete (CB). The main variables in this study are the type of concrete, the type of steel bar and the flexural behavior. The beam samples were tested by two-point loading, failure mode and crack width were observed. The results showed that the flexural process of normal concrete blocks (NCB) and composite beams with lightweight foamed concrete (CB) was almost the same. There is no slip failure at the combined interface, the flexural capacity of the composite beam with lightweight foamed concrete can be calculated based on the statics analysis and plane-section assumptions. To calculate the ultimate capacity of a composite beam with lightweight foamed concrete is to convert a section consisting of more than one fc' to an equivalent section consisting of one fc'. Furthermore, it is validated by calculating the theoretical moment capacity and comparing the theoretical moment capacity of the experimental results. The results of the flexural test, composite beam with lightweight foamed concrete (CB) showed ductile deflection behavior, diagonal crack patterns, and low flexural capacity of the beam (NCB). Doi: 10.28991/cej-2021-03091673 Full Text: PDF

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Flexural Behaviour of Lightweight Foamed Concrete Beams Reinforced with GFRP Bars

Cited by 17 publications

References 11 publications

Design Efficiency, Characteristics, and Utilization of Reinforced Foamed Concrete: A Review

Design Efficiency, Characteristics, and Utilization of Reinforced Foamed Concrete: A Review

Behavior of Reinforced Composite Foamed-Normal Concrete Beams

Flexural Behavior of Normal and Lightweight Concrete Composite Beams

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