Thermo-Mechanical Treatment to Improve Properties of Sisal Fibres for Composites

Motta, Leila Aparecida de Castro; John, Vanderley M.; Agopyan, Vahan

doi:10.4028/www.scientific.net/msf.636-637.253

Cited by 17 publications

(13 citation statements)

References 12 publications

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“…Table 3 lists a selection of biomass sources used as substitutes for reinforcement or aggregates in cement and concrete materials, together with their sizes and amount. Much more biomass materials were tested such as bamboo [35][36][37][38][39][40], sisal fibres [32,41], jute fibres [42], pineapple leaf fibres [32], sugarcane waste fibres [43], cork granular [44], curauá [45,46], cattail (typha) [47] and cellulose pulp [48][49][50][51][52] etc. They provide alternative solutions to the problem of limited supply of non-renewable mineral resources for construction.…”

Section: Types Sizes and Amount Of Biomass Used In Cementitious Prodmentioning

confidence: 99%

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Treatments of plant biomass for cementitious building materials – A review

Vo¹,

Navard²

2016

Construction and Building Materials

105

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International audienceThe use of plant biomass for developing energy efficient and low cost construction materials is an emerging field in building construction and civil engineering. Although the biomass-based cement and concrete composites have several advantages, such as low densities, low amount of CO2 gas emission, good thermal and acoustic insulation, there are also disadvantages or open questions like the durability of biomass in alkaline cement matrix, the high absorption of water and the cement-biomass compatibility, all deteriorating concrete mechanical properties, which are already intrinsically low due to the low mechanical properties of biomass-based fillers. This review gives the necessary basis in plant structure and composition for understanding how and why many treatments tested on biomass for overcoming the above-mentioned difficulties are acting. This paper reviews research papers and patents on the treatments tested to improve the mechanical properties, durability and compatibility of biomass for its use as concrete fillers for building materials

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Section: Types Sizes and Amount Of Biomass Used In Cementitious Prodmentioning

confidence: 99%

“…A combination of compression and temperature (120, 160 and 200°C) was tested [41]. Sisal fibres were heated up to certain temperature and kept for 5 min before compression was applied.…”

Section: Physical Treatmentsmentioning

confidence: 99%

Treatments of plant biomass for cementitious building materials – A review

Vo¹,

Navard²

2016

Construction and Building Materials

105

View full text Add to dashboard Cite

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“…In order to evaluate the influence of the esterification process on the mechanical properties of the fibres, tensile tests were carried out as described by Motta et al 4 and ASTM D3822 / D3822M -14 20 . The tensile tests were realized in an Instron universal machine (model 5982) with a load cell of 1 kN at a speed of 2 mm/min.…”

Section: Tensile Test Of the Fibresmentioning

confidence: 99%

“…In Brazil, coconut and sisal fibres are the most researched, as they can be easily obtained and extracted. Sisal fibres are an interesting option for reinforcement due to their high elasticity modulus, tensile strength, and availability 3,4 . Vegetable fibres have a low cost compared to synthetic fibres, and they are considered as unlimited resources 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Surface Esterification of Sisal Fibres for use as Reinforcement in Cementitious Matrix

et al. 2019

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Vegetable fibres have been shown to be promising as reinforcement in composites because they are abundant, renewable, and low cost. However, the fibre-matrix interaction can be damaged by dimensional variation of vegetable fibres, due to moisture variations. The alkaline medium of cementitious matrix is aggressive to natural fibres, compromising their durability. The aim of this study was to modify sisal fibres (Agave sisalana) by esterification with acyl chlorides to improve their stability and compatibility with the cementitious matrix in order to optimize the performance and durability of composites. The esterified fibres were characterized by moisture absorption, tensile tests, Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM) and the composites by bending tests and SEM. The results showed that esterification changed both the morphology and physical properties of sisal fibres. The composite produced using esterified fibres with octanoyl chloride maintained the properties of 28 to 90 days of age, which represented an improvement in the fibre stability compared to natural fibre composite.

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“…Para melhorar a durabilidade das fibras vegetais utilizadas como reforço em compósitos à base de cimento, várias abordagens têm sido estudadas, como impregnação com agentes bloqueadores e repelentes de água, agentes de vedação nos poros da matriz, redução da alcalinidade da matriz e combinações de impregnação e modificação da matriz (SILVA, 2009;MOTTA, 2006;MOTTA;JOHN;AGOPYAN, 2010;TONOLI et al, 2013;WEI;MEYER, 2015). O mercado do fibrocimento é o que oferece o maior desafio quanto à busca de fibras para uso como elemento de reforço e de processamento, em substituição ao amianto.…”

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Modificação química superficial de fibras de bucha vegetal visando à compatibilização e aplicação como reforço em matriz cimentícia

et al. 2017

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Resumo Este trabalho apresenta estudo da esterificação de fibras de bucha vegetal (Luffa cilyndrica) para verificar o desempenho delas na matriz cimentícia. As reações de esterificação foram realizadas com os agentes modificadores cloreto de octanoíla, cloreto de lauroíla e cloreto de estearoil, usando tolueno como solvente e piridina como catalisador. As fibras foram caracterizadas por ensaios de tração direta, microscopia eletrônica de varredura (MEV) e absorção de umidade. Foram produzidos compósitos com as fibras sem tratamento e tratadas com cloreto de octanoíla, tendo estas apresentado os melhores resultados, com redução de 65% na absorção de umidade, 40% na resistência à tração, e aumento de 67% no módulo de elasticidade. Os resultados do ensaio de flexão dos compósitos indicaram que a tenacidade da ordem de 0,70 kJ/m2 não se alterou significativamente e que houve aumento de cerca de 20% no módulo de ruptura (6,64 MPa) e no módulo de elasticidade (15,10 GPa) dos compósitos reforçados com as fibras modificadas em relação aos reforçados com as fibras sem tratamento. As melhores propriedades mecânicas do compósito com as fibras tratadas indicam que o tratamento proposto pode ter melhorado o desempenho das fibras vegetais como reforço da matriz cimentícia.

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Thermo-Mechanical Treatment to Improve Properties of Sisal Fibres for Composites

Cited by 17 publications

References 12 publications

Treatments of plant biomass for cementitious building materials – A review

Treatments of plant biomass for cementitious building materials – A review

Surface Esterification of Sisal Fibres for use as Reinforcement in Cementitious Matrix

Modificação química superficial de fibras de bucha vegetal visando à compatibilização e aplicação como reforço em matriz cimentícia

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