Experimental and microstructure study on coconut fibre reinforced self compacting concrete (CFRSCC)

Vivek, S.; Prabalini, C

doi:10.1007/s42107-020-00302-7

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…To overcome this drawback, many researchers have tried working with synthetic and non-metallic fibres. Vivek and Prabalini [43] had done experimental investigations and microstructure analysis for SCC reinforced with coconut fibres. Joanna and Sainitesh [44] whom in their investigation on the mechanical properties of SCC using steel fibres and glass fibres stated that in contrast to steel fibres in concrete, inclusion of glass fibres had a major influence on improving the compressive strength.…”

Section: Non-metallic and Natural Fibres In Sccmentioning

confidence: 99%

A comprehensive study on physico-mechanical properties of non-metallic fibre reinforced SCC blended with metakaolin and alcofine

Vivek

Karthikeyan

Selvaraj

et al. 2022

Mater. Res. Express

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This study presents a detailed experimental investigation on the effects incorporating non-metallic fibers in hybrid form in self-compacting concrete (SCC). In this regard SCC was prepared with Alccofine and Metakaolin as partial replacement for cement in 15% and 20% respectively along with the hybrid fibre combinations namely abaca fibres (0.25%, 0.5% & 0.75%), polypropylene fibres (0.5%, 1%, 1.5% & 2%) and glass fibres (0.5%, 1%, 1.5%, & 2%). The fresh properties of SCC with and without hybrid fibre combinations were assessed through the standard tests such as slump flow, J ring and V-funnel tests. The conventional mechanical tests such as compressive strength test, split tensile strength test and flexural strength test were performed at 7 and 28 days. The experimental results reveal that the fresh properties of SCC were highly influenced by alccofine and Metakaolin adopted in this research. Furthermore, that the hybrid combination of abaca with polypropylene and glass fibres improved the mechanical properties of SCC and in particular the mix with 1% glass fibre and 0.25% Abaca fibre had shown better flexural and tensile strength behaviour. Microstructure analyses were also done to confirm the improvement in mechanical properties. The Scanning Electron Microscope images of the mix with 1% glass fibre and 0.25% abaca fibre showed less voids presence and presence of more hydrated components conveying that the usage of hybrid fibres had restricted the propagation of cracks there by reducing the percentage of voids and the use of metakaolin and alcofine helping in forming hydrated components at earlier stage leading to better strength.

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Section: Non-metallic and Natural Fibres In Sccmentioning

confidence: 99%

A comprehensive study on physico-mechanical properties of non-metallic fibre reinforced SCC blended with metakaolin and alcofine

Vivek

Karthikeyan

Selvaraj

et al. 2022

Mater. Res. Express

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“…Afterwards, the fibers were rinsed in tap water until a neutral pH was reached and allowed to drain for storage. The other part of the fibers was dipped in liquid gum arabic for 1 min to generate bonding, followed by the adhesion of silica fume around them [26]. The fibers were left to dry in the shade for later storage.…”

Section: Property Unit Valuementioning

confidence: 99%

Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits

Vélez

Rodríguez

Gómez

et al. 2022

Fibers

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The purpose of this qualification work is to study the physical and mechanical behavior of concrete with the addition of 0.5% and 1% coconut fiber, which has been subjected to two chemical treatments to reduce its degradation. The coconut fibers were extracted from the raw material and cut into pieces 4 cm long. Subsequently, the fibers were subjected to two chemical treatments. The first involved immersing the fibers in 4% sodium hydroxide (NaOH) solution, and the second treatment involved coating them with gum arabic and silica fume. A total of 50 samples of fibers were collected in their natural and post-treated state to be tested. The dosage was prepared for design strengths of 210 and 240 kg/cm2 (20.59 and 23.54 MPa), so that the percentages of 0.5% and 1% volume of coconut fiber, for the two treatments selected, replaced the respective volume of coarse aggregates. The cylinders with 1% addition of fibers had the best performance for the design strength of 20.59 MPa, including the cylinders without fibers. Those with 0.5% addition of fibers presented better performance for the 23.54 MPa dosage, although this was lower than the cylinders without fibers. In all cases, the cylinders with NaOH-treated fibers outperformed their counterparts with fibers treated with gum arabic and silica fume. Finally, a CO2 balance was determined, and an environmental gain up to 14 kg in CO2 emissions was established for each cubic meter of composite concrete.

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“…However, it is necessary to understand the proper amount of NaOH concentration needed to produce better mechanical properties desirable for such natural fibers [13]. Another chemical treatment is silica fume, which together with gum arabic produces beneficial effects by reducing fiber degradation and increasing protection against chlorides, as shown by Vivek and Prabalini [14].…”

Section: Introductionmentioning

confidence: 99%

Coconut-Fiber Composite Concrete: Evaluation of Mechanical Performance

Montero,

Román,

Albuja-Sánchez

et al. 2023

Preprint

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The objective of this work is to study the physical and mechanical behavior of concrete with the addition of 0.5% and 1.0% of coconut fibers subjected to two chemical treatments in order to reduce their degradation and optimize their use in the elaboration of concrete specimens, which must comply with the standards of the American Society for Testing of Materials (ASTM), the American Concrete Institute (ACI) and the Instituto Ecuatoriano de Normalización (INEN). The coconut fibers were obtained from the raw material by hand and cut to a length of 4 cm. Subsequently, the coconut fibers were subjected to two chemical treatments: The first treatment is the immersion of the coconut fibers in 4% sodium hydroxide (NaOH) solution and the second treatment, the coconut fibers were immersed in gum arabic to consequently coat them with silica fume. A particular dosage was carried out with a proportion of 0.5% and 1.0% volume of coconut fiber for the two chemical treatments, replacing the volume of coarse aggregate. Simple concrete joists were made without fiber and with the post-treatment coconut fibers, which were subjected to flexural tests. The results indicated that the best chemical treatment is sodium hydroxide with a concentration of 4% and 1.0% coconut fiber for strengths of 210 kg/cm² and 240 kg/cm². In general, the joists with coconut fiber treated with sodium hydroxide outperformed the fibers treated with gum arabic and silica fume.

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Experimental and microstructure study on coconut fibre reinforced self compacting concrete (CFRSCC)

Cited by 8 publications

References 20 publications

A comprehensive study on physico-mechanical properties of non-metallic fibre reinforced SCC blended with metakaolin and alcofine

A comprehensive study on physico-mechanical properties of non-metallic fibre reinforced SCC blended with metakaolin and alcofine

Coconut-Fiber Composite Concrete: Assessment of Mechanical Performance and Environmental Benefits

Coconut-Fiber Composite Concrete: Evaluation of Mechanical Performance

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