Microstructure and mechanical performance of modified hemp fibre and shiv mortars: Discovering the optimal formulation

Mostefai, Nadjla; Hamzaoui, Rabah; Guessasma, Sofiane; Aw, Amadou; Nouri, H.

doi:10.1016/j.matdes.2015.06.102

Cited by 42 publications

(13 citation statements)

References 41 publications

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“…Scientific research is currently being conducted on the different natural materials that could be utilized as building materials. The examples include cut sunflower stalk mixed with gypsum binder [2] as insulation board, sisal fibers [3] as scattered reinforcement, flax [4] as an element of chipboards, hemp fibers and shives [5] in mortars, flax or hemp fibers as thermal insulation [6], but also ligneous parts of stalks cut into shives of hemp used as aggregate for the composites based on lime binder [7,8].…”

Section: Introductionmentioning

confidence: 99%

Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites

Brzyski

Suchorab

2020

Materials

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The use of waste plants in the production of building materials is consistent with the principles of sustainable development. One of the ideas involves using hemp shives as an aggregate for the production of a composite used as a filling of the timber frame construction of the walls. The most important disadvantage of using the building materials based on organic components is their susceptibility to the water influence. The wall material is exposed to rising groundwater. The research part of the paper presented the preparation method and the investigation of the hemp-perlite-lime composites. Flexural and compressive strength, apparent density, total porosity, thermal conductivity, and mass absorptivity were examined. The main research part pertained to the analysis of capillary uptake occurrence in the composites, being the important phenomenon present in the external walls. The study on this phenomenon was carried out using the technique of indirect moisture evaluation—Time Domain Reflectometry (TDR). The indirect readouts were additionally verified with the traditional evaluation using the gravimetric method based on the PN-EN 1925 standard. The study proved that the tested composites were characterized by low apparent density, thermal conductivity, strength parameters, high total porosity, and mass absorptivity. The partial replacement of hemp shives by expanded perlite had a beneficial effect on the tested properties of composites.

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Section: Introductionmentioning

confidence: 99%

Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites

Brzyski

Suchorab

2020

Materials

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“…Table 4 shows the comparison of compressive and flexural strengths of this study and other studies. As shown in Table 4, compressive and flexural strengths of mortars which contain hemp fiber (one of cellulose fibers) were gradually decreased due to the degradation of cellulose fiber in high pH condition as we discussed [45].…”

Section: Influence Of the Cellulose Fibermentioning

confidence: 80%

Investigation on the Effect of Recycled Asphalt Shingle (RAS) in Portland Cement Mortar

Nam

Youn

2016

Sustainability

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Tear-off roofing shingle, referred to as Reclaimed asphalt shingle (RAS), is the byproduct of construction demolition and it is a major solid waste stream in the U.S. Reuse of this byproduct in road construction sector can contribute to the success of materials sustainability as well as landfill conservation. Ground RAS has similar particle distribution as sand and its major component includes aggregate granules, fibers, and asphalt. To promote the beneficial utilization of RAS, this study evaluates the effect of RAS in cement mortar when used as replacement of sand. In addition, the study investigates how cellulose fibers from RAS behave under high alkaline environment during cement hydration process, which may significantly affect mortar's strength performance. The laboratory study includes measurements of physical, mechanical, and durability behaviors of cement mortar containing RAS replacing sand up to 30%. It was found that the optimum mixture proportions are 5% and 10% for compressive strength and toughness, respectively.

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“…In the same way, Mostefai et al (2015) who analyzed through mechanical tensile tests, composites of orthophthalic unsaturated polyester matrix reinforced with lignocellulosic fibers and compared them with glass fiber reinforced composites, the same one reports that the tensile strength of composite materials constituted by fibrous reinforcements depends on some factors, such as mechanical resistance, orientation, content and length of the fibers, besides the chemical stability of the matrix and the fiber-matrix interface.…”

Section: Tensile Testingmentioning

confidence: 99%

Evaluation of the Mechanical and Insulation Properties of a Polymeric Composite With Corn Cob Loads Triturated

Moreno¹

2018

Rev. Mex. Ing. Quim.

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The objective of this work was to study the viability of the use of the crushed corn cob, employed as load in a composite polyester resin. The specimens were produced with 5, 10 and 20% by weight of the ground corn cob, as fine particles (FP), medium particles (MP) and large particles (LP) to investigate the influence of the loading content on the mechanical and thermal conductivity properties of the composite material. The results of the mechanical tests, the data of impact test presented a satisfactory result for all the composites. However, the photomicrographs of the composites through SEM indicated low mechanical load/matrix adhesion, with few signs of effective stress transfer between phases, noting that the most viable particle size is the fine particle (FP). The composites shown to be viable for thermal applications, with a thermal conductivity of 0.138 W/m lower than 0.21 W/m, being classified as thermal insulation.Palabras clave: polyester resin, corn cob, modulus of elasticity, thermal conductivity, insulation. ResumenEl objetivo de este trabajo fue estudiar la viabilidad del uso de la mazorca de maíz triturada, empleada como carga en una resina compuesta de poliéster. Los especímenes se produjeron con 5, 10 y 20% en peso de la mazorca de maíz molido, como partículas finas (PF), partículas medianas (PM) y partículas grandes (PG) para investigar la influencia del contenido de carga en la mecánica y térmica propiedades de conductividad del material compuesto. Los resultados de las pruebas mecánicas, en impacto presentaron un resultado satisfactorio para todos los compuestos. Sin embargo, las fotomicrografías de los compuesto por los SEM indicaron una baja adhesión carga/matriz, con pocos signos de transferencia efectiva de tensión de las fases, señalando que el tamaño de partícula más viable es la partícula fina (PF). Los compuesto mostraron ser viables para aplicaciones en aislamiento térmico, con una conductividad térmica de 0.138W/m abajo 0.21W/m.

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Microstructure and mechanical performance of modified hemp fibre and shiv mortars: Discovering the optimal formulation

Cited by 42 publications

References 41 publications

Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites

Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites

Investigation on the Effect of Recycled Asphalt Shingle (RAS) in Portland Cement Mortar

Evaluation of the Mechanical and Insulation Properties of a Polymeric Composite With Corn Cob Loads Triturated

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