Comparative analysis of the sisal and piassava fibers as reinforcements in lightweight cementitious composites with EVA waste

Santos, Felipe M.R. dos; Souza, Thiago Francisco de; Barquete, Danilo Maciel; Amado, Franco Dani Rico

doi:10.1016/j.conbuildmat.2016.10.035

Cited by 33 publications

(7 citation statements)

References 12 publications

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“…Furthermore, suitable thermochemical properties will have an impact on mechanical properties, especially depending on tensile strength and interfacial bond of concrete reinforced with sisal fibers composites [41,42]. dos Santos et al [43] arranged a relative study on the properties of sisal and pissava fibers. He examined the compressive strength, tensile strength, workability, deformation, and bending ability are considered.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Mechanical Properties of Natural Fiber Reinforced Concrete

Shah¹,

Li²,

Yang³

et al. 2022

Journal of Renewable Materials

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Recently, addition of various natural fibers to high strength concrete has aroused great interest in the field of building materials. This is because natural fibers are much cheaper and locally available, as compare to synthetic fibers. Keeping in view, this current research conducted mainly focuses on the static properties of hybridized (sisal/coir), sisal and coir fiber-reinforced concrete. Two types of natural fibers sisal and coir were used in the experiment with different lengths of 10, 20 and 30 mm and various natural fiber concentrations of 0.5%, 1.0%, and 1.5% by mass of cement, to investigate the static properties of sisal fiber reinforced concrete (SFRC), coir fiber reinforced concrete (CFRC) and hybrid fiber reinforced concrete (HFRC). The results indicate that HFRC has increased the compressive strength up to 35.98% with the length of 20 mm and with 0.5% concentration, while the CFRC and SFRC with the length of 10 mm and with 1% concentration have increased the compressive strength up to 33.94% and 24.86%, respectively. On another hand, the split tensile strength was increased by HFRC with the length of 20 mm and with 1% concentration, CFRC with the length of 10 mm and with 1.5% concentration, and SFRC with the length of 30 mm and with 1% concentration have increased up to 25.48%, 24.56% and 11.80%, respectively, while the HFRC with the length of 20 mm and with 0.5% concentration has increased the compressive strength of concrete but has decreased the split tensile strength up to 2.28% compared to PC. Overall, using the HFRC with the length of 20 mm and with 1% concentration provide the maximum output in terms of split tensile strength.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Mechanical Properties of Natural Fiber Reinforced Concrete

Shah¹,

Li²,

Yang³

et al. 2022

Journal of Renewable Materials

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“…It was observed that all the composites presented linear behavior until the appearance of the first crack, followed by a decrease in load with the increase of the CMOD. This behavior is named deflection softening, and is characterized by the appearance of a single crack, common in composites reinforced with discrete fibers [22][23][24]. Although the pre-cracking behavior was similar for both composites, the post-cracking behavior varied according to the fiber type.…”

Section: Resultsmentioning

confidence: 99%

Cyclic Flexural Behavior of Polypropylene and Sisal Fiber Reinforced Concrete

Castoldi¹,

Souza²,

Silva³

2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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This experimental research investigation aims to compare the cyclic behavior of concrete reinforced with discrete polypropylene and sisal fibers. Prismatic concrete specimens having dimensions of 550 x 150 x 150 mm were produced with concrete containing low alkaline content. Both fibers used were 51 mm long and were incorporated into fractions of 6 kg/m 3 and 10 kg/m 3 of polypropylene and sisal fiber, respectively. A cyclic three-point flexural test was conducted in notched beams based on recommendations of RILEM TC 89-FMT. All the composites presented deflection softening behavior and both fibers provided the same level of residual loads. The loading and unloading cycles resulted in degradation of stiffness with increasing CMOD, being more evident for concretes reinforced with polypropylene fiber. Some fracture parameters obtained from the cyclic tests showed that both composites presented similar fracture properties. 1.

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“…In the last few years, EVA waste has mainly been studied to be reincorporated as a load in composites or concrete [5][6][7][8] which does not give the same value of virgin EVA. So, the ideal would be to selectively break its crosslinking bonds trying to keep its properties similar to the new EVA not crosslinked.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different mechanical recycling methods of EVA foam waste

Rosa

Zattera

Poletto

2021

Journal of Elastomers & Plastics

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In the present work, a proposal for the recycling of ethylene vinyl acetate (EVA) foam waste from the footwear industry using twin-screw extruder was evaluated. Parameters such as antioxidant addition, number of reprocessing, temperature, rotation speed were evaluated. The recycled material was evaluated by means of gel content, scanning electron microscopy (SEM), thermogravimetry (TG) and parallel plate rheometry. From this, the 4 samples were chosen, from the 16 extruded, with a higher probability of forming homogeneous foams to be used in the manufacture of new EVA foams. The foams were evaluated using scanning electron microscopy (SEM), dynamic mechanical analysis (DMA) and physical tests of density, abrasion and permanent compression deformation (PCD). The results showed a decrease in the content of crosslinked gel by up to 13 percentage points for the recycled material with antioxidant. However, there was a possible residual crosslinking, as the crosslinking of all recycled foams was greater than reference (foam). The greatest recycled material homogeneity, observed in the SEM, occurred in the samples processed for five repetitions without antioxidant. Some foams manufactured with recycled waste presented very similar morphological aspects to the reference foam. Foam manufactures with G1 recycled waste (extruded once, at 180°C, 450 rpm, without antioxidant), presented the most uniform and spherical cells. This foam also presented the best responses for the physical tests of PCD and abrasion, even compared to foam without recycle. As well as the lower viscosities for these same samples compared to the previous processing. It was understood that the viscosity of the recycled waste directly interferes with the formation of new EVA foam. Rheometry made it possible to identify the recycling process that resulted in an ideal viscosity material for incorporation in the manufacture of new EVA foams.

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Comparative analysis of the sisal and piassava fibers as reinforcements in lightweight cementitious composites with EVA waste

Cited by 33 publications

References 12 publications

Experimental Investigation on the Mechanical Properties of Natural Fiber Reinforced Concrete

Experimental Investigation on the Mechanical Properties of Natural Fiber Reinforced Concrete

Cyclic Flexural Behavior of Polypropylene and Sisal Fiber Reinforced Concrete

Evaluation of different mechanical recycling methods of EVA foam waste

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