Enhancing the mechanical and environmental performance of engineered cementitious composite with metakaolin, silica fume, and graphene nanoplatelets

Khan, Muhammad Basit; Iqbal Khan, M.; Shafiq, Nasir; Abbas, Yassir M.; Imran, Muhammad; Fares, Galal; Khatib, Jamal M.

doi:10.1016/j.conbuildmat.2023.133187

Cited by 10 publications

(6 citation statements)

References 40 publications

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“…Many studies report increases in compressive strength, while others indicate no significant changes [4,46]. However, in a study conducted on ECC, a 9% increase in compressive strength was declared, parallel with the increase obtained in this study [19]. The modest rise of the compressive strength can be attributed to the amount and type of GNP incorporated into the mixture.…”

Section: Compression Testsupporting

confidence: 70%

“…Beyond these limits, GNP had a negative effect on carbonation. Khan et al [19] investigated ECC performance with binary or ternary usage of silica fume (SF), metakaolin (MK) and GNP. The optimum mechanical and environmental performances were achieved with 10% cement replacement using SF or MK individually, or with 20% cement replacement using SF and MK equally.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the Effect of GNP Addition on Self-healing of ECC through Mechanical and Nondestructive Testing

Göçügenci,

Keskin

2024

Period. Polytech. Civil Eng.

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Inclusion of nanomaterials is an effective method for enhancing the mechanical and durability characteristics of cement-based materials. Among various graphene-based nanomaterials, graphene nanoplatelets (GNPs) are cost-effective nanoparticles that possess graphene's key properties. Since limited information is available regarding their influence on the fresh, mechanical, non-destructive, and self-healing behavior of Engineered Cementitious Composites (ECC), this research focuses on GNP inclusion on these properties of ECC in a comprehensive way. In this research, the changes in material properties of ECC were monitored with several mechanical and nondestructive test methods. According to the results, GNP inclusion significantly enhanced flexural behavior and also promoted self-healing of ECC, with preloaded specimens exhibiting substantial or complete crack closure and similar performance to virgin specimens. Non-destructive tests and microstructural analyses also confirmed the promoting effects of GNP. A noticeable increase was observed in compressive strength when GNP was included. In conclusion, this study provides compelling evidence about the positive impact of GNP inclusion on improving the properties of ECC. The findings demonstrate the potential of GNPs to enhance the performance of cementitious materials and offer valuable insights for future research and practical applications.

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Section: Compression Testsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of GNP Addition on Self-healing of ECC through Mechanical and Nondestructive Testing

Göçügenci,

Keskin

2024

Period. Polytech. Civil Eng.

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“…RSM has been shown to produce precise and comprehensive predictions [43], their use in mathematical modeling of ultimate strength and strength ratio of internally ring reinforced KT-joints is considered here. Seven dimensionless parameters and one-dimensional parameter, as listed in Table 2, were used as input components in the response surface technique.…”

Section: Response Surface Methodologymentioning

confidence: 99%

“…The equation represented by Equation 10 is a quadratic model that is an ideal predictor. It can be employed to forecast the conditions under which reactions of significance may occur [43]:…”

Section: Response Surface Methodologymentioning

confidence: 99%

Ultimate Strength of Internal Ring-Reinforced KT Joints Under Brace Axial Compression

Rasul,

Karuppanan,

Perumal

et al. 2024

Civ Eng J

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Internal ring stiffeners are frequently used to improve the ultimate strength of tubular joints in offshore structures. However, there is a noticeable absence of specific design guidance regarding the assessment of their ultimate strengths in prominent offshore codes and design guides. No equations are available to determine the ultimate strength of internal ring-reinforced KT joints. This work developed equations to determine the ultimate strength and the strength ratio of internal ring-reinforced KT joints based on numerical models and parametric studies comprising ring parameters and joint parameters. Specifically, a finite element model and a response surface approach with eight parameters (λ, δ, ψ, ζ, θ, τ, γ, and β) as inputs and two outputs (ultimate strength and the strength ratio) were evaluated since efficient response surface methodology has been proven to give precise and comprehensive predictions. KT-joint with parameters λ=0.9111, δ=0.2, ψ=0.7030, ζ=0.3, θ=45°, τ=0.90, γ=16.25, and β=0.6 has the maximum ultimate strength, and the KT-joint with parameters: λ=1, δ=0.2, ψ=0.8, ζ=0.5697, θ=45°, τ=0.61, γ=24, and β=0.41 has the maximum strength ratio. The KT-joints with the optimized parameters were validated through finite element analysis. The percentage difference was less than 1.7%, indicating the applicability and high accuracy of the response surface methodology. Doi: 10.28991/CEJ-2024-010-05-012 Full Text: PDF

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“…In this study, we attempt to use seawater and coral sand to prepare SCECC instead of freshwater and silica sand in traditional ECC to reduce the cost of ECC production. Some scholars have applied principles from fracture mechanics and micromechanics, along with a performance-driven design approach, to integrate short-cut fibers into cement, mineral admixtures, fine aggregates, and high-performance admixtures [7]. It is aimed to achieve fiber-reinforced cementitious composites characterized by two key features by designing and optimizing the fiber, matrix, and fiber-matrix interfaces: multi-slit cracking and strain hardening [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of PVA Fiber on the Mechanical Properties of Seawater Coral Sand Engineered Cementitious Composites

Han,

Gao,

et al. 2024

Materials

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The physical and mechanical characteristics of seawater coral sand engineered cementitious composites (SCECC) were examined through uniaxial compression, three-point bending, and splitting tensile tests. The mechanical properties were scrutinized under varying fiber volume fraction conditions (V = 0%, 0.575%, 1.150%, 1.725%, and 2.300%). The experimental results indicated that the compressive strength, three-point bending strength, and split tensile strength of SCECC tended to increase with the rise in fiber volume fraction. The strengths attained their maximum values of 45.88, 12.56, and 3.03 MPa when the fiber volume fraction reached 2.300%. In the compression test, the compressive strength of the 7-day specimen can achieve more than 78.50% of that observed in the 28-day specimen. Three-point bending test has revealed that SCECC exhibits favorable strain-hardening and multi-crack cracking characteristics. Fracture patterns of SCECC exhibited variations corresponding to changes in fiber content, as illustrated by their load–deformation curves, the addition of PVA fibers can change the damage mode of cementitious composites from brittle to ductile. The fracture energy of SCECC further attests to its elevated toughness. This is due to the fact that the fibers delay the formation of microcracks and prevent crack expansion, thus significantly increasing the deformability of the material. By verifying its strength, deformability, fracture energy, and other key performance indicators, the feasibility of SCECC in coastal construction projects has been clarified. The successful development of SCECC provides an innovative and high-performance option for the construction of future island projects.

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Enhancing the mechanical and environmental performance of engineered cementitious composite with metakaolin, silica fume, and graphene nanoplatelets

Cited by 10 publications

References 40 publications

Investigating the Effect of GNP Addition on Self-healing of ECC through Mechanical and Nondestructive Testing

Investigating the Effect of GNP Addition on Self-healing of ECC through Mechanical and Nondestructive Testing

Ultimate Strength of Internal Ring-Reinforced KT Joints Under Brace Axial Compression

Effect of PVA Fiber on the Mechanical Properties of Seawater Coral Sand Engineered Cementitious Composites

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