Improving shear behavior of rubberized concrete beams through sustainable integration of waste tire steel fibers and treated rubber

Ahmed, Sayed; Elshazli, Mohamed T.; Zaghlal, Mahmoud; Alashker, Yasser; Abdo, Ayman

doi:10.1016/j.jobe.2024.110649

Journal of Building Engineering

2024

DOI: 10.1016/j.jobe.2024.110649

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Improving shear behavior of rubberized concrete beams through sustainable integration of waste tire steel fibers and treated rubber

Sayed Ahmed,

Mohamed T. Elshazli,

Mahmoud Zaghlal

et al.

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2024

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Cited by 3 publications

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Improving flexural response of rubberized RC beams with multi-dimensional sustainable approaches

Abdo,

Elshazli,

Alashker

et al. 2024

Construction and Building Materials

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Improving flexural response of rubberized RC beams with multi-dimensional sustainable approaches

Abdo,

Elshazli,

Alashker

et al. 2024

Construction and Building Materials

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Effects of Steel and Glass Fibers on the Compressive Behavior of Rubberized Concrete: An Experimental Study and Constitutive Modeling

Lv,

Li,

Zhu

et al. 2024

Buildings

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Rubberized concrete exhibits enhanced toughness and sustainability but suffers from reduced mechanical strength, limiting its applications. This study enhanced the compressive strength of rubberized concrete using hybrid steel/glass fibers. The results showed a positive synergy between the hybrid fibers, with improvements in compressive strength, elastic modulus, Poisson’s ratio, peak strain, and compressive toughness by 16.1%, 19.4%, 32.0%, 63.4%, and 101.7%, respectively, at a hybrid fiber content of 0.8% (steel fiber 0.6% and glass fiber 0.2%). A well-fitting stress–strain model was adopted for future constitutive simulations. This study advances the understanding of rubberized concrete with hybrid steel/glass fibers under axial compression and promotes its application in structural engineering.

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Assessment of Various Mitigation Strategies of Alkali-Silica Reactions in Concrete Using Accelerated Mortar Test

Almakrab,

Elshazli,

Ibrahim

et al. 2024

Materials

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The widespread use of reinforced concrete continues to face challenges, particularly in mitigating alkali-silica reaction (ASR), due to its detrimental effects on concrete strength and durability. This paper investigates the effectiveness of using binary supplementary cementitious materials (SCMs) in mitigating ASR by incorporating metakaolin (MK) and waste glass powder (GP) as partial replacements for cement. Additionally, the potential of a new cement product, “NewCem Plus” (NCM), along with the use of basalt fibers and lithium, was evaluated through a 14-day accelerated mortar bar test following the ASTM C1260. This study also assessed concrete’s properties such as its compressive strength and workability using the flow test. The results indicated that MK was effective, reducing expansion by 79%, 84%, and 88% with 10%, 20%, and 30% cement replacement, respectively, compared to the control mixture. On the other hand, GP showed a more modest reduction in expansion, with 10%, 20%, and 30% replacement levels reducing expansion by 20%, 43%, and 75%, respectively. Furthermore, the addition of lithium to MK significantly mitigated ASR, reducing expansion below the ASTM threshold. However, mixtures containing NewCem Plus, lithium, and basalt fibers showed minimal impact on ASR reduction. These findings underscore the viability of using binary or ternary blends of SCMs to mitigate ASR in concrete, encouraging their adoption in future concrete applications.

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Improving shear behavior of rubberized concrete beams through sustainable integration of waste tire steel fibers and treated rubber

Cited by 3 publications

References 54 publications

Improving flexural response of rubberized RC beams with multi-dimensional sustainable approaches

Improving flexural response of rubberized RC beams with multi-dimensional sustainable approaches

Effects of Steel and Glass Fibers on the Compressive Behavior of Rubberized Concrete: An Experimental Study and Constitutive Modeling

Assessment of Various Mitigation Strategies of Alkali-Silica Reactions in Concrete Using Accelerated Mortar Test

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