Strengthening of plain concrete cylinders with hybrid composites based on basalt and sisal fiber systems

Joseph, Lakshmi; Kumar, Pradip; Jayanarayanan, Karingamanna; Mini, K.M.

doi:10.1016/j.matpr.2022.06.366

Cited by 4 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, recently, an emerging trend has been the usage of natural fibers in FRP composites as a replacement for conventional synthetic fibers. In fact, natural fibers such as sisal, jute, abaca, and flax fiber, which have moderate tensile and flexural properties, when used in fiber reinforced polymers were effective in retrofitting concrete columns [14][15][16]. The usage of natural fibers in strengthening application is considered to be a renewable and sustainable solution.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hybrid Fiber Multiscale Polymer Composites for Structural Confinement under Cyclic Axial Compressive Loading

et al. 2023

Self Cite

View full text Add to dashboard Cite

Fiber reinforced polymer (FRP) confinement is recognized as the most promising technique for the strengthening and retrofitting of concrete structures. In order to enhance the performance of conventional epoxy-based FRP composites, nano filler modification of the epoxy matrix was implemented in the current study. In particular, the cyclic loading response of standard concrete specimens externally confined by epoxy-based natural and hybrid fiber reinforced polymer systems was investigated. The confinements were realized with sisal fiber reinforced polymer (SFRP) and hybrid sisal basalt fiber reinforced polymer (HSBFRP). Moreover, the effects of multiwalled carbon nanotubes (MWCNT) were also investigated. Three different specimen sets were considered for study: (i) unconfined specimens, (ii) epoxy-based FRP confined specimens and (iii) MWCNT incorporated epoxy-based FRP confined specimens. The specimens were tested in repeated compressive mode in loading-unloading cycles at increasing displacement levels. The test results revealed that FRP wrapping could enhance the mechanical behavior of unconfined columns in terms of strength and ductility. Moreover, it was evident that the mechanical properties of the epoxy matrix were enhanced by MWCNT incorporation. The developed epoxy-based FRP confinement containing MWCNT ensures improvement in axial strength by 71% when compared with unconfined specimens. The epoxy-based FRP confinement, with and without MWCNT, exhibited a high strain redistribution behavior around the concrete core. In comparison to the unconfined specimens, the confinement could increase the sustained axial strain from 0.6 to 1.4% using epoxy-based FRP confinement and to 1.6% with MWCNT incorporated epoxy-based FRP confinement. Further, an empirical model was developed to predict the ultimate axial stress of concrete columns confined externally with FRP jackets. The ultimate compressive strength obtained from the experimental study was compared with the proposed model, and the observed deviation was lower than 1%.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of Hybrid Fiber Multiscale Polymer Composites for Structural Confinement under Cyclic Axial Compressive Loading

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…For example, using carbon fibers as the only reinforcement, despite their high mechanical and thermal properties, 2–7 may impose high cost for manufacturers. Various efforts have been made to improve the properties of fiber reinforced polymer composites 8–10 . Azimpour‐Shishevan et al 8 investigated the effect of the addition of multiwall carbon nanotubes (CNTs) and graphene platelets (GPLs) on the mechanical, dynamic, viscoelastic, and water uptake properties of basalt fiber‐reinforced epoxy (BFE) composites.…”

Section: Introductionmentioning

confidence: 99%

The influence of addition of carbon nanotube and graphene platelets on characteristics of carbon/basalt fiber reinforced intra‐ply hybrid composites

Azimpour-Shishevan

Mohtadi-Bonab

Akbulut

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this study, effects of addition of carbon nanotubes (CNTs) and graphene platelets (GPLs) on characteristics of carbon/basalt fiber reinforced intra-ply hybrid composites were investigated. The composites were fabricated using vacuum assisted resin infusion molding (VARIM) method in two types including bare and 0.1, 0.5 wt.% of GPL and CNT nanoparticles filled hybrid composites. Fabricated normal and multiscale composites were cut by water jet and mechanical properties of specimens were examined by tensile, flexural, SBS experiments. Therefore, the modulus of elasticity, flexural modulus, tensile and flexural strength and ILSS of bare and multiscale composites were compared. Thermomechanical properties of fabricated composites were evaluated by dynamic mechanic analyze (DMA), thermogravimetric analyze (TGA) and thermal conductivity (TC) tests and storage modulus, loss modulus, damping ratio, glass transition temperature, weight loss and derivative weight loss were compared in fabricated normal and multiscale composites. Similarly, modal properties of fabricated composites such as natural frequency and damping factor were obtained by vibrational tests and compared in fabricated composites. According to the results, the addition of carbon-based nanoparticles improved the characteristics of carbon/basalt fiber intra-ply hybrid composites.The response of composites was directly proportional to the addition ratio of the carbon-based nanoparticles.

show abstract

Nano filler incorporated epoxy based natural hybrid fiber confinement of concrete systems: Effect of fiber layers and nano filler addition

Joseph

Chakravarthi

et al. 2023

Structures

View full text Add to dashboard Cite

Strengthening of plain concrete cylinders with hybrid composites based on basalt and sisal fiber systems

Cited by 4 publications

References 21 publications

Evaluation of Hybrid Fiber Multiscale Polymer Composites for Structural Confinement under Cyclic Axial Compressive Loading

Evaluation of Hybrid Fiber Multiscale Polymer Composites for Structural Confinement under Cyclic Axial Compressive Loading

The influence of addition of carbon nanotube and graphene platelets on characteristics of carbon/basalt fiber reinforced intra‐ply hybrid composites

Nano filler incorporated epoxy based natural hybrid fiber confinement of concrete systems: Effect of fiber layers and nano filler addition

Contact Info

Product

Resources

About