Technology and market opportunities in fiber cement composites for small scale enterprises in Nigeria

Amaindamhen, SO

doi:10.4314/gjass.v12i1.2

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Waste fibres have been used to reinforce plastics, cement and other hydrophobic polymers, and there has been an increased effort towards promoting a circular bioeconomy by recycling these materials in new composite products [8,9]. The use of waste fibre-reinforced composites in housing construction will not only alleviate the pressures of overexploitation of plant-based fibres, but also serve as avenues 1 3 for the utilization of abundant waste fibres generated in paper recycling mills [10].…”

Section: Introductionmentioning

confidence: 99%

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Amiandamhen

Osadolor

2020

J Mater Cycles Waste Manag

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There is a growing interest on recycling of waste fibres as an alternative to landfill disposal. The aim of the study was to investigate the durability and mechanical properties of waste paper-cement composite panels reinforced with varying kenaf fibre content (FC, 2-10%). The panels produced were evaluated for properties including modulus of rupture (MOR) and apparent modulus of elasticity (MOE). The resistance of the panels was tested in the field for both termite damage and fungi decay for a period of 24 weeks. Accelerated decay test was also performed on selected samples. The results showed that the mean MOR ranged from 3.17 MPa for samples with 10% FC to 4.84 MPa for samples with 8% FC. The mean MOE ranged from 248 MPa for samples with 10% FC to 1298.1 MPa for samples with 8% FC. Statistical analysis showed that the effect of the fibre content was significant on the properties evaluated (p < 0.05). The study concluded that the optimum fibre content for improving the strength and physical properties of paper-cement composites in a ratio of 1:1 (w/w) using kenaf as reinforcing fibre is 8%. The panels were highly resistant to both termite and fungi attack for the study duration.

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Section: Introductionmentioning

confidence: 99%

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Amiandamhen

Osadolor

2020

J Mater Cycles Waste Manag

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“…The fibres content depends on their tendency to aggregate [12] and it is crucial that the fibres are being properly mixed and evenly dispersed throughout the matrix [7,13]. Although tests have shown that such natural fibre-based mortars are characterized by satisfying tensile and flexural strength, fine powdered fibres do not significantly contribute to bridging qualities following micro-crack development and instead, primarily serve as fillers [14]. Additionally, for a range of fibre contents, flexural strength, fracture toughness and dimensional stability all increase as the fibres length rises and as their diameter declines [15,16].…”

Section: Introductionmentioning

confidence: 99%

Wood fibres as additives in mortars: a sustainable reinforcement

Stefanidou

Kampragkou

Kamperidou

2023

IOP Conf. Ser.: Earth Environ. Sci.

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In mortars, the use of fibres has been diachronically a commonly used technique. In Ancient Greece, wood and straw fibres were particularly used to increase volume stability in clay and lime mortars. Overtime, with the evolution of technology, natural fibres were replaced by modern materials like polypropylene, steel, glass and carbon fibres. Recently, the climate change and the strong demand for independence from non-renewable mineral resources have urged the search for alternative ways to utilize bio-materials to produce innovative, high value-added products. The wood waste material, coming from loggings or trunks mechanical processing, constitutes valuable bio-degradable, non-toxic material of low environmental impact that could be utilized as reinforcements to produce advanced wood polymer composites. In the current study, fibres of two widely available wood species (black pine and beech) have been used (1-2 cm length). The fibres were added in lime-based and cement-based mortars in proportion 1.5% v/v of the mortar. Physical, thermal and mechanical properties were tested at the age of 28 and 90 days, while at fresh state, workability of the mixtures was recorded. It was found that in traditional systems, the formulations with black pine required higher amount of water for the same workability probably due to the higher hygroscopicity of the fibres. This was not the case in cement-based systems. Small reduction of the mechanical properties was recorded, as well as an increase of the water capillary absorption of the bio-fibres reinforced samples. Thermal conductivity was improved probably due to the porosity increase. In all cases, the shape of the samples was retained even after fracture and crack formation. Between the two wood species used, the black pine gave more beneficiary results. In general, wood-fibres revealed a high potential to upgrade the lime- and cement-based mortars performance and be further promoted in the construction sector.

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Coconut Fiber Cement Panels as Wall Insulation and Structural Diaphragm

2019

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This study considers the applications of natural fiber composites in affordable housing projects located in the two districts of Gujarat, India, and Gorkha, Nepal, with the goal of addressing issues of thermal comfort and lateral loading from seismic activity. To help alleviate some of these issues, the team worked with the Hunnarshala Foundation, in Bhuj, India, to develop a fiber cement composite that could be applied to the interior or exterior of a home and provide both insulative and structural improvements. Thermal conductivity of the composites comprised of various mixes were measured using a heat flux machine. Experimental results of 0.16-0.19 W/m•K showed an improvement in thermal conductivity compared to current wall cladding materials ranging from 1.60 to 1.88 W/m•K. Modeling of the building envelope was completed using the EnergyPlus TM tool and showed that homes using the fiber cement composites would have an overall reduction in heating and cooling requirements. The study used coconut husk fibers (referred to as coconut coir), rattan, and pine wood fibers in addition to Portland cement, fly ash, and hydrated lime in the fabrication of fiber cement composite samples. Flexural strength of natural fiber samples was 70% stronger than comparison specimens, suggesting possible application for wall cladding to reduce out-of-plane failure during seismic events. Field tests conducted in Gujarat validated lab results as well as qualitative perceptions of the material. Continued work with local partners presents several possible applications of coconut coir fiber cement composites for retrofit and new construction housing.

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Technology and market opportunities in fiber cement composites for small scale enterprises in Nigeria

Cited by 3 publications

References 2 publications

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Wood fibres as additives in mortars: a sustainable reinforcement

Coconut Fiber Cement Panels as Wall Insulation and Structural Diaphragm

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