Cost-Effective ECC with Low Fiber Content for Pavement Application

Arce, Gabriel; Noorvand, Hassan; Hassan, Marwa; Rupnow, Tyson; Hungria, Ricardo

doi:10.1051/matecconf/201927107001

Cited by 21 publications

(5 citation statements)

References 13 publications

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“…ECC possesses various characteristics, such as multiple cracking and strain hardening, and its ultimate tensile strain is several hundred times greater than that of ordinary concrete [1]. ECC is widely used in civil engineering [2,3]. However, ECC typically employs a single fiber system, resulting in a relatively high-fiber fracture rate and a challenge in achieving both high strength and high ductility [4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Yang,

Li,

Zhong

et al. 2023

Buildings

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Although shape memory alloy/Polyvinyl alcohol (SMA/PVA) hybrid fiber reinforced cementitious composites, (SMA/PVA-ECC) exhibit excellent crack closure and deformation recovery capabilities, however, the research on their fundamental mechanical properties is still limited. This study investigates the tensile mechanical properties of SMA/PVA-ECC materials by conducting uniaxial tensile tests, analyzing the failure behavior, stress–strain curves, and characteristic parameters of the specimens, comparing the influence of SMA fiber content and diameter, and establishing a tensile constitutive model. The results show that the residual crack width of SMA/PVA-ECC specimens significantly decreases after unloading, and SMA fiber content and diameter have a significant impact on the tensile properties of the specimens. The comprehensive tensile properties of specimens with a fiber diameter of 0.2 mm and content of 0.2% are the best, with their initial cracking strength, ultimate strength, and strain increasing by 56.4%, 23.6%, and 13.4%, respectively, compared to ECC specimens. The proposed bilinear tensile constitutive model has high accuracy. This study provides a theoretical basis for further research on SMA/PVA-ECC materials.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Yang,

Li,

Zhong

et al. 2023

Buildings

View full text Add to dashboard Cite

show abstract

“…ECC possesses various characteristics, such as multiple cracking and strain hardening, and its ultimate tensile strain is several hundred times greater than that of ordinary concrete [1]. The ECC has been widely used in civil engineering [2][3]. However, ECC typically employs a single fiber system, resulting in a relatively high fiber fracture rate and a challenge 2 in achieving both high strength and high ductility [4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Yang

Zhong

et al. 2023

Preprint

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Although SMA/PVA hybrid fiber reinforced cementitious composites (SMA/PVA-ECC) exhibit excellent crack closure and deformation recovery capabilities, the research on their fundamental mechanical properties is still limited. This study investigates the tensile mechanical properties of SMA/PVA-ECC materials by conducting uniaxial tensile tests, analyzing the failure behavior, stress-strain curves, and characteristic parameters of the specimens, comparing the influence of SMA fiber content and diameter, and establishing a tensile constitutive model. The results show that the residual crack width of SMA/PVA-ECC specimens significantly decreases after unloading, and the SMA fiber content and diameter have a significant impact on the tensile properties of the specimens. The comprehensive tensile properties of specimens with a fiber diameter of 0.2 mm and content of 0.2% are the best, with their initial cracking strength, ultimate strength, and strain increasing by 56.4%, 23.6%, and 13.4%, respectively, compared to ECC specimens. The proposed bilinear tensile constitutive model has high accuracy. This study provides a theoretical basis for further research on SMA/PVA-ECC materials.

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“…As such, different researchers have adopted autonomic self-healing, which is a process that includes the use of engineered additives to improve self-healing efficiency ( 4 , 5 ). The following techniques were used in previous studies as autonomic self-healing techniques: bacterial concrete, chemical encapsulation, mineral admixtures, a chemical in glass tubing, and intrinsic self-healing with small self-controlled crack width ( 6 – 10 ).…”

mentioning

confidence: 99%

Optimization of the Self-Healing Efficiency of Bacterial Concrete Using Impregnation of Three Different Precursors into Lightweight Aggregate

Omar

Mousa

Hassan

et al. 2022

Transportation Research Record: Journal of the Transportation R

Self Cite

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Implementation of self-healing concrete technologies is a promising approach to enhance the durability of the transportation infrastructure. Among these technologies, bacterial concrete has the potential to seal microcracks through microbial-induced calcite precipitation (MICP). To ensure the viability of this technology, bacterial protection is essential given concrete’s harsh environment. Additionally, the success of this technology depends on the presence of an adequate mineral precursor compound and nutrient for the bacteria. As such, the main objective of this study was to optimize the healing efficiency of bacterial concrete in subtropical climates through the vacuum impregnation of bacteria into a lightweight aggregate (LWA). To achieve this objective, mortar samples were prepared while incorporating different combinations of precursors (magnesium acetate, calcium lactate, and sodium lactate) and alkali-resistant healing agent Bacillus pseudofirmus bacteria (with and without). In addition, a control sample was prepared without bacteria or precursors for comparative purposes. For each sample, three mortar cubes and three mortar beams were cast and used to evaluate the compressive strength, crack healing efficiency, and flexural strength recovery. Additionally, the morphology of healing products was observed in bacteria-containing samples under scanning electron microscopy with energy x-ray dispersive spectroscopy using a scanning electron microscope (SEM) with EDAX Pegasus energy dispersive spectroscopy (EDS). Results showed that self-healing bacterial concrete could be optimized (without significant reduction in mechanical properties) if Bacillus pseudofirmus bacteria at a concentration of 108 cells/ml and sodium lactate precursor at a concentration of 75 mM/l were impregnated into lightweight aggregate.

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Cost-Effective ECC with Low Fiber Content for Pavement Application

Cited by 21 publications

References 13 publications

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Optimization of the Self-Healing Efficiency of Bacterial Concrete Using Impregnation of Three Different Precursors into Lightweight Aggregate

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