Evaluation of PVA and PBI-based engineered-cementitious composites under different environments

Fares, Galal; Khan, M. Iqbal; Mourad, Shehab; Abbass, Wasim

doi:10.1016/j.conbuildmat.2015.03.080

Cited by 20 publications

(9 citation statements)

References 14 publications

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“…Figure 8 shows the stress–strain behavior of the SHCC as determined by three dumbbell-shaped specimens tested under uniaxial tension. Additional details regarding this test are provided in [ 43 , 44 , 45 ], a collection of the authors’ previous research studies. According to the results of this study, the composite’s mean tensile strength was 4.35 ± 0.21 MPa and its strain capacity was 2.0%.…”

Section: Resultsmentioning

confidence: 99%

Structural Performance Improvement of Reinforced Concrete Beams by Strain-Hardening Cementitious Composite Layers

et al. 2023

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A strain-hardening cementitious composite (SHCC) is a modern engineered material offering exceptional ductility and durability. A potential application of SHCCs for crack control and to improve structural members’ load-bearing capabilities is due to its superior properties. In this study, SHCCs were used to enhance the load-carrying capacity and the cracking behavior of precast RC beams. In the bottom tension region of RC beams, the SHCCs of different layer thicknesses (0%, 15%, 30%, and 45% of section height) were cast. Laboratory-scale beams were used in 4-point bending tests. SHCC-layered RC beams showed improved flexural performance compared to control RC beams. Among retrofitted beams, the one with an SHCC layer of 30% of the section height was found to be the most efficient pertaining to strength, ductility, and cracking control. In this study, the flexural response of composite beams was also predicted using an analytical approach. The average difference between predicted and measured moment capacities was less than 10%.

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Section: Resultsmentioning

confidence: 99%

Structural Performance Improvement of Reinforced Concrete Beams by Strain-Hardening Cementitious Composite Layers

et al. 2023

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“…In order to improve the tensile performance of normal concrete, different types of cementitious composites of high tensile ductility have been developed in recent decades such as high-performance fibre-reinforced cementitious composite (HPFRCC), strain hardening cementitious composite (SHCC), engineered cementitious composite (ECC), ultrahigh performance SHCC (UHP-SHCC), etc. These are mainly formulated by the addition of higher amount of cement or reactive powder and fine aggregates of uniform size with reinforcement of metallic or non-metallic fibres [1]. Subsequently, the fibres, matrix and fibre matrix interaction are tailored by systematically applying the principles of micromechanics namely strength and energy criteria to achieve strain hardening behaviour [2].…”

Section: Introductionmentioning

confidence: 99%

Performance of fibre-reinforced cementitious composites at elevated temperatures: A review

Rawat

Lee

Zhang

2021

Construction and Building Materials

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“…11,12 The mix design of SHCC is optimized for the best strain-hardening properties using non-standard local materials, as shown in previous studies. [21][22][23][24] Various researchers have reported that the application of SHCC as a repair material to existing structures improves safety and functionality. [25][26][27][28][29][30] In particular, the presence of SHCC layers in the tension soffit of RC beams improves their flexural, ductility, and fatigue properties.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of strain-hardening cementitious composite to curing conditions as a retrofitting material for RC beams

Khan

Fares

Abbas

et al. 2021

Journal of Engineered Fibers and Fabrics

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Strain-hardening cement-based composites (SHCC) have recently been developed as repair materials for the improvement of crack control and strength of flexural members. This work focuses on strengthening and flexural enhancement using SHCC layer in tensile regions of flexural members under three different curing conditions. The curing conditions simulate the effect of different environmental conditions prevailing in the central and coastal regions of the Arabian Peninsula on the properties of SHCC as a retrofitting material. In this investigation, beams with SHCC layer were compared to control beams. The beams with SHCC layer of 50-mm thickness were cast. The results revealed that the flexural behavior and the load-carrying capacity of the normal concrete beam specimens under hot and dry environmental conditions were significantly reduced, lowering the ductility of the section. However, compressive strength is comparatively unaffected. Similarly, the hot curing conditions have also led to a notable reduction in the loading capacity of the beam with SHCC layer with a slight effect on its stiffness. On the other hand, steam-curing conditions have shown improvement in load-carrying capacity and a reduction in section ductility of the beam with SHCC layer. It was found that the structural unit retrofitted with SHCC layer was a curing-regime dependent as the tensile and strain-hardening properties of SHCC are highly sensitive to the alteration in the cement hydration process. A normal curing regime was found effective and satisfying the practical, cost, and performance requirements. Accordingly, a normal curing regime could be implemented to retrofit reinforced concrete (RC) beams with SHCC layers as recommended in the study.

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Evaluation of PVA and PBI-based engineered-cementitious composites under different environments

Cited by 20 publications

References 14 publications

Structural Performance Improvement of Reinforced Concrete Beams by Strain-Hardening Cementitious Composite Layers

Structural Performance Improvement of Reinforced Concrete Beams by Strain-Hardening Cementitious Composite Layers

Performance of fibre-reinforced cementitious composites at elevated temperatures: A review

Susceptibility of strain-hardening cementitious composite to curing conditions as a retrofitting material for RC beams

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