Behaviour of engineered cementitious composites and hybrid engineered cementitious composites at high temperatures

Pourfalah, Saeed

doi:10.1016/j.conbuildmat.2017.10.077

Cited by 93 publications

(45 citation statements)

References 14 publications

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“…The casted beam specimens had their final dimensions as 515 × 220 × 115 mm (L × B × H), where depth 115 mm includes 100-mm brick and 15-mm ECC retrofit layer. Figure 3 shows detailed dimensions of beam and fixed support locations for the flexural testing setup [2,34].…”

Section: Casting Methodologymentioning

confidence: 99%

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Experimental investigation of engineered cementitious composites (ECC) retrofitted masonry structures

Endait

Kolhe

2020

SN Appl. Sci.

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Earthquake has proven the most damaging natural hazard in the world. So, structures in the earthquake-prone areas are need to be retrofitted prior and post of the calamity. It has been observed that most of the research solutions available focus upon reinforced concrete and steel constructions. Engineered cementitious composites (ECC) developed for economical utilization of fibres in retrofitting of masonry structures have been focused herein. The performance of beam-like masonry specimens subjected to their out-of-plane forces are experimentally and numerically investigated in this paper. Twelve beam-like specimens were cast and retrofitted with polyvinyl alcohol engineered cementitious composites (PVA-ECC) for the purpose. The casting of the retrofitting layer was done by varying percentages of PVA fibres that are 1%, 1.5% and 2% addition by the total volume of mortar. The performance of out-of-plane direction is investigated trough static two-point loading. The specimens were tested at a constant load increment of 0.1 mm per second. Work was conducted to simulate the ultimate cracking loads, maximum tension/deflection and load to deflection relationships of retrofitted and non-retrofitted specimens. Preliminary experimental data were used for numerically modelling the specimens in finite element package. Numerical results for deflection and strength were finally compared with experimental results. Experimental results revealed that the maximum load-carrying capacity with retrofitted samples increased by 11.8, 10.15 and 11.13% for 1%, 1.5% and 2% fibre addition, respectively. Simultaneously, deflection before complete collapse increases 5, 8 and 10% for 1%, 1.5% and 2% fibre additions. It can be finally said that utilization PVA-ECC as retrofitting material is an economical and easy method available.

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Section: Casting Methodologymentioning

confidence: 99%

“…Data-integrated applications include the mechanical APDL application (formerly ANSYS), ANSYS FLUENT, ANSYS CFX, the Mechanical application (formerly Simulation), etc. [34].…”

Section: About Software Packagementioning

confidence: 99%

Experimental investigation of engineered cementitious composites (ECC) retrofitted masonry structures

Endait

Kolhe

2020

SN Appl. Sci.

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“…Wu et al [19] studied the effect of the morphological parameters of natural sand on the mechanical properties of ECCs. The mechanical behavior of ECC and fiber-reinforced ECC at high temperatures has also been investigated for solar emission, fire, gas explosion, and blast scenarios [20,21].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Quasi-Static Tensile Capacity of Engineered Cementitious Composites Reinforced with Steel Grid and Fibers

Liu

et al. 2019

Materials

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An engineered cementitious composite (ECC) was reinforced with a steel grid and fibers to improve its tensile strength and ductility. A series of tensile tests have been carried out to investigate the quasi-static tensile capacity of the reinforced ECC. The quasi-static tensile capacities of reinforced ECCs with different numbers of steel-grid layers, types of fibers (Polyvinyl alcohol (PVA) fiber, KEVLAR fiber, and polyethylene (PE) fiber), and volume fractions of fibers have been tested and compared. It is indicated by the test results that: (1) On the whole, the steel grid-PVA fiber and steel grid-KEVLAR fiber reinforced ECCs have high tensile strength and considerable energy dissipation performance, while the steel grid-PE fiber reinforced ECC exhibits excellent ductility. (2) The ultimate tensile strength of the reinforced ECC can be improved by the addition of steel grids. The maximal peak tensile stress increase is about 50–95% or 140–190% by adding one layer or two layers of steel grid, respectively. (3) The ultimate tensile strength of the reinforced ECC can be enhanced with the increase of fiber volume fraction. For a certain kind of fiber, a volume fraction between 1.5% and 2% grants the reinforced ECC the best tensile strength. Near the ultimate loading point, the reinforced ECC exhibits strain hardening behavior, and its peak tensile stress increases considerably. The energy dissipation performance of the reinforced ECC can also be remarkably enhanced by such an increase in fiber volume fraction. (4) The ductility of the steel grid-PVA fiber reinforced ECC can be improved by the addition of steel grids and the increase of fiber volume fraction. The ductility of the steel grid-KEVLAR fiber reinforced ECC can be improved by the addition of steel grids alone. The ductility and energy dissipation performance of the steel grid-PE fiber reinforced ECC can be improved with the increase of fiber volume fraction alone. A mechanical model for the quasi-static initial and ultimate tensile strength of the steel grid-fiber reinforced ECC is proposed. The model is validated by the test data from the quasi-static tension experiments on the steel grid-PE fiber reinforced ECC.

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“…The pseudo strain hardening behaviour of ECC makes it highly ductile. ECC is cement based strain hardening ductile cementitious composite [3][4][5][6]. Ingredients of ECC are similar to fiber reinforced concrete.…”

Section: Introductionmentioning

confidence: 99%

Appraisal of Hybrid Fiber Reinforced Engineered Cementitious Composite

Singh¹,

Saini²,

Chalak³

2019

Proceedings of the 4th International Conference on Civil, Structural and Transportation Engineering (ICCSTE'19)

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Mortar based engineered cementitious composite (ECC) demonstrate strain hardening behaviour with multiple micro-cracks under tension. The distinctive behaviour of ECC, makes it ductile as compared to brittle nature of conventional concrete. Ductile nature of ECC, makes it applicable in seismic resistant, repairing and retrofitting areas and blast resistant structural elements. In the present investigation, two types of polymer fibers (i.e. polyester (PET) fiber and polyvinyl alcohol (PVA) fiber) have been used in hybridization with different percentages (2+0), (2+0.5), (1.75+0.5), (1.5+0.5) for making ECC. Also fly ash, 55% of the total cementitious material, has been used for making sustainable concrete. The compressive, flexural and tensile tests were performed to evaluate the mechanical behaviour of hybrid fiber reinforced cementitious matrix. The test results revealed that PET fiber and PVA fiber in combination enhanced the strength properties of ECC by bridging effect of hybrid fibers.

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Behaviour of engineered cementitious composites and hybrid engineered cementitious composites at high temperatures

Cited by 93 publications

References 14 publications

Experimental investigation of engineered cementitious composites (ECC) retrofitted masonry structures

Experimental investigation of engineered cementitious composites (ECC) retrofitted masonry structures

Experimental Investigation on the Quasi-Static Tensile Capacity of Engineered Cementitious Composites Reinforced with Steel Grid and Fibers

Appraisal of Hybrid Fiber Reinforced Engineered Cementitious Composite

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