Mechanical properties of hemp fibre reinforced cement: Influence of the fibre/matrix interaction

Sedan, David; Pagnoux, Cécile; Smith, Agnès; Chotard, Thierry

doi:10.1016/j.jeurceramsoc.2007.05.019

Cited by 315 publications

(138 citation statements)

References 24 publications

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“…Investigations of natural fibres such as sisal, coconut, bamboo, jute, banana, coir and hemp fibres have revealed desirable effects on  the mechanical and physical properties of brittle organic and inorganic matrices [18][19][20][21][22][23][24][25][26][27]. For example, the mechanical and thermal properties of geopolymer resin have been significantly improved as a result of natural wool fibre reinforcement [28,29].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

et al. 2014

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Abstract:Geopolymer composites containing woven cotton fabric (0-8.3 wt%) were fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 ℃, 400 ℃, 600 ℃, 800 ℃ and 1000 ℃. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 ℃, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

et al. 2014

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“…In addition, the treated fiber surface contains a significant amount of debris, which indicates that even after thorough washing, the calcium hydroxide particles deposited on the fiber surface still remain. Figure 3B depicts that pectin in the fibers can have the ability to trap calcium as found by Sedan et al (2007). This suggests that calcium hydroxide treatment significantly modifies the hemp fiber surface structure and increases the surface roughness.…”

Section: Resultsmentioning

confidence: 66%

Engineering Properties of Treated Natural Hemp Fiber-Reinforced Concrete

Zhou

Saini

Kastiukas

2017

Front. Built Environ.

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In recent years, the construction industry has seen a significant rise in the use of natural fibers, for producing building materials. Research has shown that treated hemp fiberreinforced concrete (THFRC) can provide a low-cost building material for residential and low-rise buildings, while achieving sustainable construction and meeting future environmental targets. This study involved enhancing the mechanical properties of hemp fiber-reinforced concrete through the Ca(OH) 2 solution pretreatment of fibers. Both untreated (UHFRC) and treated (THFRC) hemp fiber-reinforced concrete were tested containing 15-mm length fiber, at a volume fraction of 1%. From the mechanical strength tests, it was observed that the 28-day tensile and compressive strength of THFRC was 16.9 and 10% higher, respectively, than UHFRC. Based on the critical stress intensity factor (K s IC ) and critical strain energy release rate (G s IC ), the fracture toughness of THFRC at 28 days was also found to be 7-13% higher than UHFRC. Additionally, based on the determined brittleness number (Q) and modulus of elasticity, the THFRC was found to be 11% less brittle and 10.8% more ductile. Furthermore, qualitative analysis supported many of the mechanical strength findings through favorable surface roughness observed on treated fibers and resistance to fiber pull-out.

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“…However, it is necessary to consider that the use of natural fibers within the cementitious matrix presents a series of problems related to their organic nature. Various studies have found that the natural fibers degrade when they are immersed in a cementitious matrix because the highly alkaline environment of the matrix dissolves the primary compounds of the fibers, such as lignin and hemicellulose, and consequently weakens their microstructure (Stancato, Burke & Beraldo, 2005;Sedan, Pagnoux, Smith & Chotard, 2008;Kriker, Bali, Debicki, Bouziane & Chabannet, 2008). Another factor to consider is the high absorption of natural fibers (Savastano, Warden & Coutts, 2005).…”

Section: Aspects Of Durabilitymentioning

confidence: 99%

Low impact fiber reinforced material composite

Alvarado

Lopez

Mendoza

et al. 2017

Revista de la Asociación Latinoamericana de Control de Calidad,

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This article investigates the mechanical behavior of fiber-reinforced cementitious composites using moderate to high contents of fly ash (FA) as a replacement for cement; the goal is to create primary building elements with low environmental impact. The experimental results showed that the compressive strength, modulus of elasticity, and post-cracking flexural strength for specimens with w/cm = 0.60 and 20% FA substitution increased with respect to the control. Moreover, the specimens with high FA substitutions had significantly lower mechanical strength values and elastic modulus values. The results indicate that it is feasible to use fiber-reinforced concrete composites as an alternative for low-environmental impact primary construction. Keywords: fiber; cementitous; composites; fly ash, impact material. Legal InformationRevista ALCONPAT is a quarterly publication of the Latinamerican Association of quality control, pathology and recovery of construction-International, A.C.; Km. 6, Antigua carretera a Progreso, Mérida, Yucatán, México, C.P. 97310, Tel.5219997385893. E-mail: revistaalconpat@gmail.com, Website: www.revistaalconpat.org. Compuestos cementantes fibroreforzados de bajo impacto ambiental comportamiento mecánico RESUMENEl presente texto expone los resultados del estudio del comportamiento mecánico de compuestos cementantes fibroreforzados utilizando consumos moderados y altos de ceniza volante (CV) en sustitución de volúmenes determinados de cemento (20%, 40% y 60%), con el objetivo de producir elementos constructivos primarios de bajo impacto ambiental. La experimentación realizada indicó que el esfuerzo a compresión, el módulo de elasticidad y la resistencia a flexión post agrietamiento, para los especímenes con relación a/mc = 0.60 y con 20% de sustitución con CV registraron incrementos en sus valores con respecto al control para ambas edades. No se evidenció deterioro en las mallas de fibras naturales por la exposición al medio alcalino. Los resultados hasta ahora obtenidos indican que es viable el uso de estos compuestos cementantes fibroreforzados como alternativa de construcción primaria de bajo impacto ambiental. Palabras clave: fibra; cementicios; compuestos; ceniza volante; material de impacto. Compostos cimentantes reforçados com fibra e de baixo impacto ambiental RESUMOEste artigo apresenta algumas importantes propriedades mecânicas obtidas numa pesquisa de materiais cimentantes reforçados com fibras, nos quais foram utilizados consumos moderados e altos de cinza volante (fly ash, FA), em substituição ao cimento Portland (20%, 40% e 60%), com o objetivo de produzir elementos primários de baixo impacto ambiental. Os resultados experimentais mostraram que a resistência à compressão, o módulo de elasticidade e a resistência à flexão, aumentaram em relação ao de referência, para as misturas de a/cm = 0,60 e 20% de substituição. Para os demais casos de substituição foram encontradas resistências e módulo mais baixos que o de referência. Os resultados mostraram que pode ser viável o us...

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Mechanical properties of hemp fibre reinforced cement: Influence of the fibre/matrix interaction

Cited by 315 publications

References 24 publications

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

Engineering Properties of Treated Natural Hemp Fiber-Reinforced Concrete

Low impact fiber reinforced material composite

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