Energy dissipation characteristics of all-grade polyethylene fiber-reinforced engineered cementitious composites (PE-ECC)

Yu, Kequan; Ding, Yao; Liu, Jiepeng; Bai, Yu-Lei

doi:10.1016/j.cemconcomp.2019.103459

Cited by 104 publications

(36 citation statements)

References 39 publications

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“…Strain energy g se is defined as the area underneath the stress-strain curves prior to the peak tensile stress. 30 The tensile strain capacity of both mixtures exceeded 5%, which is at the similar level with normal PE-ECC (tensile strain of 5%-12%). 15,31 It is speculated that the superior ductility of the gypsum-based composites results from the ultra-high F I G U R E 9 Cracking patterns of GS-ECC under different strain levels: (A) crack bridging capacity supplied by PE fiber.…”

Section: Tensile Performancementioning

confidence: 53%

“…The uniaxial tension test results, including the first cracking stress σ tc , peak tensile strength σ tu , tensile strain capacity ε tu , strain energy g se of each composites are listed in Table 6. Strain energy g se is defined as the area underneath the stress‐strain curves prior to the peak tensile stress 30 . The tensile strain capacity of both mixtures exceeded 5%, which is at the similar level with normal PE‐ECC (tensile strain of 5%‐12%) 15,31 .…”

Section: Resultsmentioning

confidence: 93%

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Development of gypsum‐based composites with tensile strain‐hardening characteristics

Wang

Jian

et al. 2020

J Am Ceram Soc

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Brittle nature of gypsum restrains its wide application in construction industry. For improvement, a novel type of composite material, gypsum-based engineered cementitious composites (GS-ECC), was developed using specially chosen polyethylene (PE) fibers. This study investigated the rheological and mechanical properties of GS-ECC, that is, workability, uniaxial tensile and compressive behavior, flexural strength, etc The investigation showed that GS-ECC possessed excellent tensile strain-hardening behavior and saturated cracking characteristics with the average tensile strain capacity more than 5%. To explore the underlying mechanism, the microstructure of interface transition zone (ITZ) between gypsum crystals and PE fibers were investigated through the use of SEM. Single fiber pull-out test, bending-fracture test, and single crack tension test were conducted to investigate the mesoscopic properties from fiber/matrix interface to matrix toughness and fiber bridging capacity. This study demonstrates the feasibility of achieving strain-hardening gypsum-based composites by adding the PE fibers. K E Y W O R D S fiber-matrix interface, gypsum, polyethylene fiber, strain hardening gypsum composite, ultra-high ductility How to cite this article: Wang Y, Jian X, Yu J, Ye J, Dong F. Development of gypsum-based composites with tensile strain-hardening characteristics.

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Section: Tensile Performancementioning

confidence: 53%

Section: Resultsmentioning

confidence: 93%

Development of gypsum‐based composites with tensile strain‐hardening characteristics

Wang

Jian

et al. 2020

J Am Ceram Soc

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“…RA and AF. The correlation between RA and AF has been widely utilized to analyze the crack modes of RC components, which can be calculated by equations (6) and 7, respectively The tensile crack (emission of longitudinal waves) requires less time to reach the maximum amplitude than the shear crack (emission of transverse waves) since the longitudinal wave has a higher velocity of propagation in solid materials. The tensile crack always has a lower RA and a higher AF, while the shear crack shows the opposite.…”

Section: Ae Analysis Methodsmentioning

confidence: 99%

Characterization of damage on precast pre-stressed concrete composite slabs under static loading based on acoustic emission parameters

Shan

Liu

Jiang

et al. 2020

Structural Health Monitoring

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Precast pre-stressed concrete composite slabs have been widely used in recent years owing to excellent mechanical properties and cost savings. The low accuracy of visual observation and the complexity of actual measurement make the determination of the precise information of structural safety difficult. This article presents an acoustic emission study on the precast pre-stressed concrete composite slab under static loading. First, the correlation between acoustic emission hits (or energy) and crack width (or deflection) was obtained and compared in detail. Second, the stiffness of this composite slab was predicted using the acoustic emission amplitude. Third, a novel analysis method for damage fracture classification is proposed, which is based on the traditional parameter and fuzzy C-means clustering. This method can be used to determine visual crack emerging, rebar yielding, and eventual failure mode by an acoustic emission parametric analysis without involving visual inspection or mechanical measurement. It can be effectively used for fracture characterization and health monitoring of composite slabs.

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“…The ingredients of the mix design included CAC, OPC, GGBFS, fine silica sand as well as PE fibre. The slag to cement ratio was chosen at a mass proportion of 1.5 and 3.8, and PE fibres were employed with a volume fraction of 1% [ 15 , 16 ]. OPC-based fibre-reinforced mortar and CAC-based plain mortar were also prepared as a reference with the slag to cement ratio of 1.5.…”

Section: Experimental Programmentioning

confidence: 99%

Durability of Fibre-Reinforced Calcium Aluminate Cement (CAC)–Ground Granulated Blast Furnace Slag (GGBFS) Blended Mortar after Sulfuric Acid Attack

Fan

Zhuge

et al. 2020

Materials

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Concrete wastewater infrastructures are important to modern society but are susceptible to sulfuric acid attack when exposed to an aggressive environment. Fibre-reinforced mortar has been adopted as a promising coating and lining material for degraded reinforced concrete structures due to its unique crack control and excellent anti-corrosion ability. This paper aims to evaluate the performance of polyethylene (PE) fibre-reinforced calcium aluminate cement (CAC)–ground granulated blast furnace slag (GGBFS) blended strain-hardening mortar after sulfuric acid immersion, which represented the aggressive sewer environment. Specimens were exposed to 3% sulfuric acid solution for up to 112 days. Visual, physical and mechanical performance such as water absorption ability, sorptivity, compressive and direct tensile strength were evaluated before and after sulfuric acid attack. In addition, micro-structure changes to the samples after sulfuric acid attack were also assessed by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) to further understand the deterioration mechanism. The results show that overall fibre-reinforced calcium aluminate cement (CAC)-based samples performed significantly better than fibre-reinforced ordinary Portland cement (OPC)-based samples as well as mortar samples in sulfuric acid solution in regard to visual observations, penetration depth, direct tensile strength and compressive reduction. Gypsum generation in the cementitious matrix of both CAC and OPC-based systems was the main reason behind the deterioration mechanism after acid attack exposure. Moreover, laboratory sulfuric acid testing has been proven for successfully screening the cementitious material against an acidic environment. This method can be considered to design the service life of concrete wastewater pipes.

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Energy dissipation characteristics of all-grade polyethylene fiber-reinforced engineered cementitious composites (PE-ECC)

Cited by 104 publications

References 39 publications

Development of gypsum‐based composites with tensile strain‐hardening characteristics

Development of gypsum‐based composites with tensile strain‐hardening characteristics

Characterization of damage on precast pre-stressed concrete composite slabs under static loading based on acoustic emission parameters

Durability of Fibre-Reinforced Calcium Aluminate Cement (CAC)–Ground Granulated Blast Furnace Slag (GGBFS) Blended Mortar after Sulfuric Acid Attack

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