Flexural behavior of high-strength concrete beams reinforced with a strain hardening cement-based composite layer

Khan, M. Iqbal; Abbass, Wasim

doi:10.1016/j.conbuildmat.2016.08.132

Cited by 34 publications

(12 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Since the ECC had high tensile strength and ductility, it will carry the tensile strength together with the steel reinforcement after concrete cracks, resulting in higher strength. is trend is consistent with other research works [15,18,19]. Differently, the unbonded composite beam showed a great postcrack energy absorption capacity due to the deformation of the ECC layer.…”

Section: Properties Of Ecc Materialsupporting

confidence: 80%

“…However, large cracks developed at the concrete could cause localized cracking in the ECC layer [15,19]. Some cracks could still penetrate through the ECC layer, resulting in an entry path for corrosive agents.…”

Section: Introductionmentioning

confidence: 99%

“…ese unique properties make ECC very suitable as concrete cover for bridges under aggressive environments [11]. Researches have been carried out to investigate the mechanical properties of the reinforced ECC-concrete composite beam [12][13][14][15][16][17][18][19]. Compared to normal reinforced concrete, properties, including load-carrying capacity, deformability, crack controlling ability, and fatigue, of beam with ECC layer were improved significantly.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flexural Properties of ECC‐Concrete Composite Beam

Guan

Yuan

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

Rebar corrosion-induced durability issue is a major concern for bridges. e ECC cover was employed to prevent the intrusion of the corrosive agent. is paper studied the flexural behavior of ECC-concrete composite beam. e effects of bonding at the interface and fiber mesh reinforcement on the flexural properties and cracking pattern were investigated. e strain distribution and midspan deflection were evaluated. Test results show that the bonded composite beam had a higher loading capacity. But the unbonded composite beam showed better postcrack energy absorption capacity with higher midspan deflection. e fiber mesh reinforcement could further improve the flexural properties regardless of the bonding condition. e strain at the bottom of the unbonded beam was much smaller than that of the bonded beam. e penetrated cracks were observed at the ECC layer of the bonded composited beam.

show abstract

Section: Properties Of Ecc Materialsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flexural Properties of ECC‐Concrete Composite Beam

Guan

Yuan

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Numerous studies have been conducted to assess the mechanical behavior of steel reinforced ECC members (R-ECC). Superior ductility is observed because of the interfacial interactions between randomly-distributed fibers and cement matrix, which allow ECC to bear tensile, flexural and shear loads [10,11,12]. Hence, the brittle failure modes such as shear failure and bond-splitting could be well controlled by using ECC materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Damage Detection in ECC-Concrete Composite Beams Using Piezoelectric Transducers

Qin

Zhang

Xie

et al. 2019

Sensors

View full text Add to dashboard Cite

The use of engineered cementitious composite (ECC) has attracted extensive attention in recent years because of the highly enhanced ductility owing to its unique strain-hardening behavior. In this paper, an electromechanical impedance-based technique is used to monitor the structural damage of RC beams strengthened with an ECC layer at the tensile zone. To achieve this purpose, three specimens are tested under bending loads to evaluate the proposed damage detection methodology. Five externally bonded PZT transducers are uniformly distributed at the surface of the ECC layer of the beams to measure the output conductance signatures in a healthy state and in different damage scenarios induced by different load levels. Test results showed that discrepancies exist between the signals measured in the intact state and each damage state, which can be used to evaluate the structural integrity changes. To assess the damage of ECC-concrete composite beams quantitatively, the statistical scalar index-root mean square deviation (RMSD) is used as the index, which can be calculated from the variations of conductance measurements of PZT sensors. The damage index values of the uniformly distributed PZT sensors provided cogent evidence of damage and revealed the evolution of structural damage. The crack patterns of beams at different damage levels are compared with the damage index values, and it shows the damage location can be derived from the measured conductance signatures of an array of PZT transducers.

show abstract

Flexural behavior of high-strength concrete beams reinforced with a strain hardening cement-based composite layer

Cited by 34 publications

References 11 publications

Flexural Properties of ECC‐Concrete Composite Beam

Flexural Properties of ECC‐Concrete Composite Beam

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

Experimental Study on Damage Detection in ECC-Concrete Composite Beams Using Piezoelectric Transducers

Contact Info

Product

Resources

About