Macro- and nanodimensional plant fiber reinforcements for cementitious composites

Parveen, Shama; Rana, Sohel; Fangueiro, Raúl

doi:10.1016/b978-0-08-102001-2.00020-6

Cited by 21 publications

(10 citation statements)

References 120 publications

(85 reference statements)

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“…It can also be noticed from both optical micrographs and agglomerated area that the increase in MCC concentration increased MCC agglomeration at all CTAB concentrations, which was also previously noticed in case MCC suspensions prepared with or without surfactants (Parveen et al 2017b(Parveen et al , 2018. The MCC agglomerated area obtained with CTAB in the present study was significantly lower as compared to suspensions prepared with only ultrasonication (Parveen et al 2017a) (which resulted in * 16% agglomerates using 30 min ultrasonication as compared to only * 5% agglomerates using CTAB and 15 min ultrasonication) due to the positive role of CTAB in MCC dispersion. Also, it is clear from Fig.…”

Section: Resultssupporting

confidence: 87%

“…These nano/micro structures such as nanocrystalline cellulose (NCC), nanofibrillated cellulose (NFC), microcrystalline cellulose (MCC), microfibrillated cellulose (MFC), etc. offer a high modulus and strength, high surface area, excellent bonding with cementitious matrices, good compaction and dense composite microstructure and consequently, significantly improved the mechanical properties of cementitious composites (Das et al 2009;Parveen et al 2017a;Balea et al 2019;Hisseine et al 2019;Tarchoun et al 2019). Although a positive effect was observed by NFC on the toughness of cementitious composites (Haddad Kolour et al 2020) probably due to its fibrillar structure with a high aspect ratio, CNC and MCC (due to their high stiffness and low aspect ratio) did not show any positive effect (or even deteriorated in some studies) on the toughness and ductility of cementitious composites (Parveen et al 2017b(Parveen et al , 2018.…”

Section: Introductionmentioning

confidence: 99%

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Micro-structure and mechanical properties of microcrystalline cellulose-sisal fiber reinforced cementitious composites developed using cetyltrimethylammonium bromide as the dispersing agent

et al. 2021

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This paper reports new hierarchical cementitious composites developed using microcrystalline cellulose (MCC), sisal fibers and cetyltrimethylammonium bromide (CTAB) as the dispersing agent. MCC was dispersed in water without and with CTAB at different concentrations using ultrasonication and the optimum CTAB concentration for achieving homogeneous and stable MCC suspensions was found to be 40%. Hierarchical composites were fabricated using MCC (0.1–1.5 wt% of cement), sisal fibers (20 mm, 0.25% and 0.50 wt% of cement), 40% CTAB and tri-butyl phosphate as the defoaming agent. Mechanical strengths of composites improved significantly at 0.1 wt% MCC, which along with 0.5% sisal fibers improved compressive and flexural strengths by ~ 24% and ~ 18%, respectively. The hybrid reinforcement exhibited a synergistic effect on the fracture behavior of composites improving the fracture energy up to 40%. Hierarchical composites also showed improved fiber-matrix bonding, lower porosity and water absorption, superior hydration, carbonation resistance and durability up to 90 ageing cycles.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Micro-structure and mechanical properties of microcrystalline cellulose-sisal fiber reinforced cementitious composites developed using cetyltrimethylammonium bromide as the dispersing agent

et al. 2021

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“…Plant-based cellulose fibers such as sisal, jute, hemp, jute, coir, etc. are low-cost, less hazardous over synthetic fibres, eco-friendly and possess high specific mechanical strength (Parveen, 2017a). These fibres were found effective in significantly improving the fracture properties of concrete (Peters et al, 2010;Soltan et al, 2017).…”

Section: Introductionmentioning

confidence: 97%

“…However, the direct addition of MCC powder to cementitious composites was not found much effective due to agglomeration of MCC (Hoyos et al, 2013). Therefore, MCC has been processed using a number of dispersion techniques to ensure a homogeneous MCC dispersion within cementitious composites (Anju et al, 2016;Parveen et al, 2017aParveen et al, , 2017bSilva et al, 2018). For example, cementitious composites with MCC (0.2% to 1.0 wt.% of cement) were developed by dispersing MCC in water using a magnetic stirring process for 45 min before adding to the cement mixture (Silva et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Mechanical and micro-structural investigation of multi-scale cementitious composites developed using sisal fibres and microcrystalline cellulose

Filho

Parveen

Rana

et al. 2020

Industrial Crops and Products

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This research work attempts, for the first time, to use sisal fibres and microcrystalline cellulose (MCC) in combination for developing multi-scale cementitious composites with improved strength, modulus as well as fracture energy. MCC (0.1% to 3.0 wt.%) was first dispersed in water with the help of Pluronic F-127 surfactant (20% of MCC wt.) using ultrasonication and subsequently, the MCC suspensions were added to cement-sand mixtures containing sisal fibers (0.25 to 2 wt.% of cement). Visual observation, UV-Vis analysis and optical microscopy suggested that ultrasonication for only 15 min led to homogeneous MCC suspensions without significant sedimentation and Pluronic significantly reduced the total agglomerated area and the average MCC particle size in the suspensions. The use of up to 2 wt.% sisal fibres (without MCC) increased the fracture energy of cementitious composites by 351% (after 28 days hydration) but reduced the compressive and flexural strengths by 38% and 13%, respectively. On the contrary, MCC (without sisal fibres) could strongly improve the compressive strength (20.5% using 0.1wt.% MCC) but was not found so effective in improving the fracture energy (improved by 29% using 0.1 wt.% MCC). However, multi-scale reinforcements containing 0.1 wt.% MCC and 0.25-0.5 wt.% sisal fibres led to improvements of up to 18.4%, 30.1%, 30% and 100% in the compressive strength, flexural strength, flexural modulus and fracture energy of composites, presenting distinct advantages over only sisal fibre or MCC-based reinforcements. The results indicated the formation of higher amount of hydration products in multi-scale composites due to the positive effect of MCC on cement hydration. Superior hydration in the multi-scale composites resulted in a denser microstructure with a lower pore size and an improved fibre-matrix interface, improving significantly the strength, modulus and fracture energy.

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“…Nowadays, the significant number of published papers on this topic calls for a critical review. Only two book chapters provide a general overview of the use of NCs [68,69], summarizing the main improvements and findings from a few research papers. The highly scattered and controversial results of the published studies give this critical review great importance at this time and in this moment so as to explain the differences amongst the behaviors observed in the literature for the efficient future application of NCs in FCCs .…”

Section: Introductionmentioning

confidence: 99%

Nanocelluloses: Natural-Based Materials for Fiber-Reinforced Cement Composites. A Critical Review

et al. 2019

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Nanocelluloses (NCs) are bio-based nano-structurated products that open up new solutions for natural material sciences. Although a high number of papers have described their production, properties, and potential applications in multiple industrial sectors, no review to date has focused on their possible use in cementitious composites, which is the aim of this review. It describes how they could be applied in the manufacturing process as a raw material or an additive. NCs improve mechanical properties (internal bonding strength, modulus of elasticity (MOE), and modulus of rupture (MOR)), alter the rheology of the cement paste, and affect the physical properties of cements/cementitious composites. Additionally, the interactions between NCs and the other components of the fiber cement matrix are analyzed. The final result depends on many factors, such as the NC type, the dosage addition mode, the dispersion, the matrix type, and the curing process. However, all of these factors have not been studied in full so far. This review has also identified a number of unexplored areas of great potential for future research in relation to NC applications for fiber-reinforced cement composites, which will include their use as a surface treatment agent, an anionic flocculant, or an additive for wastewater treatment. Although NCs remain expensive, the market perspective is very promising.

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Macro- and nanodimensional plant fiber reinforcements for cementitious composites

Cited by 21 publications

References 120 publications

Micro-structure and mechanical properties of microcrystalline cellulose-sisal fiber reinforced cementitious composites developed using cetyltrimethylammonium bromide as the dispersing agent

Micro-structure and mechanical properties of microcrystalline cellulose-sisal fiber reinforced cementitious composites developed using cetyltrimethylammonium bromide as the dispersing agent

Mechanical and micro-structural investigation of multi-scale cementitious composites developed using sisal fibres and microcrystalline cellulose

Nanocelluloses: Natural-Based Materials for Fiber-Reinforced Cement Composites. A Critical Review

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