Mechanical strength and microstructure of engineered cementitious composites: A new configuration for direct tensile strength, experimental and numerical analysis

Tahmouresi, Behzad; Nemati, Parisa; Asadi, Mohammad; Saradar, Ashkan; Moein, Mohammad Mohtasham

doi:10.1016/j.conbuildmat.2020.121361

Cited by 48 publications

(7 citation statements)

References 38 publications

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“…The schematic diagram in Figure 3 illustrates the setup of the uniaxial tensile test, including the specimen dimensions (resembling a dog bone shape) [23]. [24] This study examined the microstructure and mechanical characteristics of engineered cementitious composites (ECC), focusing on the direct tensile strength. The results explained that in comparison to slag and river sand, The flowability of fresh ECC mixtures was improved by the addition of fly ash and silica sand.…”

Section: Direct Tensile Strength and Strain Characteristicsmentioning

confidence: 99%

“…Graph 3 shows the greatest flexural strength of ECC with various fiber and cementitious material combinations. [24] This research looked into When the fly ash combinations failed, the flexural strength and displacement showed a noticeable improvement, with a 37% rise in strength and a threefold increase in displacement. [6] this study investigated that after three days, the performance of the ECC (Engineered Cementitious Composite) that incorporates both SL (Silica Fume) and FA (Fly Ash) is greater, measuring at least 40 mm higher than that of the ECC70-0.…”

Section: Flexural Propertiesmentioning

confidence: 99%

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Recent studies on the mechanical properties of Engineered Cementitious Composite

Khan,

Nag,

Jaggi

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Engineered Cementitious Composite (ECC) is a type of High-Performance Fiber-Reinforced Cementitious Composite (HPFRCC) that has emerged as a promising material for use in construction and engineering. ECC is designed based on micromechanical theory, resulting in a remarkable tensile strain capacity of over 6%, while maintaining a low fiber volume fraction of no more than 2%. The material’s high flexibility enables it to be molded into various shapes, and it exhibits excellent mechanical properties, making it suitable for field applications such as the construction of joint-less deck slabs, link slabs, and retrofitting of critical structures like dams and tunnels. However, the accurate characterization of ECC’s properties requires the use of appropriate testing methods, particularly regarding its mechanical characteristics, including compressive strength, flexural strength, and direct and indirect tensile strength. This review highlights the significance of understanding ECC’s mechanical properties and emphasizes the importance of using appropriate testing techniques to evaluate the material’s properties and structural behavior.

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Section: Direct Tensile Strength and Strain Characteristicsmentioning

confidence: 99%

Section: Flexural Propertiesmentioning

confidence: 99%

Recent studies on the mechanical properties of Engineered Cementitious Composite

Khan,

Nag,

Jaggi

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Concrete is the most used building material, with an annual consumption of well over 25 billion tons [ 1 , 2 , 3 , 4 , 5 ]. The availability of ingredients, ease of casting in any shape, economy, high compressive strength, as well as good durability in various environmental conditions are the factors that make concrete such a versatile construction material [ 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Impact Resistance of High-Strength Portland Cement Concrete Containing Steel Fibers

et al. 2022

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Impact resistance of Portland cement concrete (PCC) is an essential property in various applications of PCC, such as industrial floors, hydraulic structures, and explosion-proof structures. Steel-fiber-fortified high-strength concrete testing was completed using a drop-weight impact assessment for impact strength. One mix was used to manufacture 320 concrete disc specimens cured in both humid and dry conditions. In addition, 30 cubic and 30 cylindrical specimens were used to evaluate the compressive and indirect tensile strengths. Steel fibers with hooked ends of lengths of 20, 30, and 50 mm were used in the concrete mixtures. Data on material strength were collected from impact testing, including the number of post-first-crack blows (INPBs), first-crack strength, and failure strength. Findings from the results concluded that all the steel fibers improved the mechanical properties of concrete. However, hooked steel fibers were more effective than crimped steel fibers in increasing impact strength, even with a smaller length-to-diameter ratio. Concrete samples containing hybrid fibers (hooked + crimped) also had lower compressive strength than the other fibers. Comparisons and analogies drawn between the test results and the static analyses (Kolmogorov–Smirnov and Kruskal–Wallis) show that the p-value of the analyses indicates a more normal distribution for curing in a humid environment. A significant difference was also observed between the energy absorptions of the reinforced mixtures into steel fibers.

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“…Aside from the fiber characteristics, the efficiency, hence the dispersion of fibers directly affects the performance of the composite in terms of multiple self-controlled crack widths and strain-hardening behavior (Li and Li 2013). Nevertheless, the ingredients used in the ECC mix design were shown to have a significant effect on the microstructure and tensile properties of ECC (Tahmouresi et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Effects of particle size optimization of quartz sand on rheology and ductility of engineered cementitious composites

Karaca

Tekin²,

Keskin³

et al. 2022

rdlc

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In this study, the effect of particle size of quartz sand on the fresh and hardened properties of engineered cementitious composites (ECC) was investigated. For this purpose, three ECC mixtures that are identical except for the gradation of quartz sands used in their composition were designed. One of the mixtures includes a combination of quartz sands with amounts determined by the Andreasen and Andersen particle size optimization model while the remaining two have a finer and a coarser gradation. In the fresh state, mini slump, mini V-funnel and bleeding tests were applied, and rheological parameters were determined according to Bingham and modified Bingham models by using a rotational viscometer. In the hardened state, flexural strengths, mid-span deflections and numbers of microcracks formed under flexural loading were determined at 7 and 28 days. It was observed that the particle size optimization of the quartz sand can provide a balance between flow and bleeding characteristics of ECC mixtures. Although a reduction in flexural strength occurred at both ages in the optimized ECC mixture, the deflection capacity and the crack formation capacity under loading were significantly increased, reaching a deflection value of over 10 mm with at least 11 cracks formed during the test. As a result, it was revealed that particle size optimization can yield a mixture with the highest ductility without compromising the workability of ECC.

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Mechanical strength and microstructure of engineered cementitious composites: A new configuration for direct tensile strength, experimental and numerical analysis

Cited by 48 publications

References 38 publications

Recent studies on the mechanical properties of Engineered Cementitious Composite

Recent studies on the mechanical properties of Engineered Cementitious Composite

Investigation of Impact Resistance of High-Strength Portland Cement Concrete Containing Steel Fibers

Effects of particle size optimization of quartz sand on rheology and ductility of engineered cementitious composites

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