Effects of fibre reinforcements on properties of extruded alkali activated earthen building materials

Ojo, Emeso B.; Bello, Kabirat O.; Mustapha, Kabiru; Teixeira, Ronaldo Soares; Santos, S.F.; Savastano, Holmer

doi:10.1016/j.conbuildmat.2019.116778

Cited by 33 publications

(33 citation statements)

References 42 publications

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“… The incorporation of fibres (0-1.2%) decreased the bulk density (1,690-1,565 kg/m 3 ) and increased the total porosity (38-42%) of stabilized CEBs. The fraction of the total Plant Polymer porosity accessible by water was 0.85-0.90 (33-36%) with plant fibres and 0.75-0.85 (33-35%) with polymer fibres.…”

Section: Resultsmentioning

confidence: 99%

“…The total porosity, TP (%), was estimated form the ratio of the bulk density, ρ b , of CEBs and the equivalent specific density, ρ s, of constituting particles, using eqn (2). The water absorption, WA (%), after saturation was determined using eqn (3). The coefficient of capillary absorption, Ca 10min (g/cm 2 .min 1/2 ), was determined using eqn (4), referring to XP P13-901 standard [38].…”

Section: Production and Characterization Of Cebsmentioning

confidence: 99%

“…The incorporation of fibres in earthen materials is traditionally practised to improve their performance in building construction. The most recent scientific studies of the effects of fibres on the earthen materials have been mainly carried out on the physical and mechanical properties of adobe/mud bricks [1], [2], extruded or compressed earth blocks (CEBs) [3]- [9] and rarely on the hygrothermal properties and durability of CEBs [5], [9]- [11]. However, if CEBs, the modern technique of earth-based building construction [12], are to be used in the warm Sahelian region such as Burkina Faso; it is essential to understand their thermophysical properties and ways for their improvement for taking full advantages of their potential to regulate the hygrothermal and energy performance of buildings [13], [14].…”

Section: Introductionmentioning

confidence: 99%

“…In order to counteract the likely decrease of the compressive strength, various studies incorporated fibres in matrix of earth stabilized with chemical binders, such as cement, lime, organic or geopolymer [3], [10]. However, the incorporation of 0-0.2% date palm fibre still decreased the compressive strength of CEBs stabilized with 8% lime, but improved the thermal conductivity [5].…”

Section: Introductionmentioning

confidence: 99%

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Thermophysical and Mechanical Properties of Compressed Earth Blocks Containing Fibres: By-Product of Okra Plant and Polymer Waste

Nshimiyimana

Hema

Zoungrana

et al. 2020

WIT Transactions on the Built Environment

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Municipal wastes such as water sachets and agricultural by-products in Burkina Faso need proper management to limit their hazards to the environment. This study investigated the effect of incorporation of fibres from agricultural by-products (okra plant fibre) and water sachet wastes (polymer fibre) on thermophysical and mechanical properties of stabilized compressed earth blocks (CEBs). The CEBs were moulded from moistened mixtures of clayey earthen material stabilized with 10 wt.% CCR (calcium carbide residue) and incorporated with 0 to 1.2 wt.% fibre of each type. The CEBs were cured in a closed environment, at room temperature in the lab (30 ± 5°C) for 45 days. Cured CEBs were dried (40 ± 2°C) and tested for the thermophysical and mechanical properties. The experimental results showed that the average bulk density of CEBs decreased in the range of 1690-1565 kg/m 3 with the incorporation of 0-1.2% fibre. The thermal conductivity and diffusivity also decreased, respectively, in the ranges of 0.84 to 0.63 W/m.K and 6.1E-7 to 4.2E-7 m 2 /s with plant fibres and 0.84 to 0.38 W/m.K and 54E-7 to 2.3E-7 m 2 /s with polymer fibres. This resulted in evolution of the depth of penetration of the thermal flux from 0.12 to 0.07 m which is smaller than the total thickness of the CEBs (0.14 m). This shows the improvement of the thermal performance of the CEBs incorporated with fibres in the context of the warm climate of Burkina Faso. However, the dry and wet compressive strength respectively decreased from 4.3 to 2.9 MPa and 2.7 to 1.3 MPa, which were respectively greater than 2 and 1 MPa required for the construction of non-load bearing buildings. These results suggest that CEBs containing by-product fibres are useful to improve the thermal efficiency of one-storey building.

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Section: Resultsmentioning

confidence: 99%

Section: Production and Characterization Of Cebsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermophysical and Mechanical Properties of Compressed Earth Blocks Containing Fibres: By-Product of Okra Plant and Polymer Waste

Nshimiyimana

Hema

Zoungrana

et al. 2020

WIT Transactions on the Built Environment

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“…The weight ratio of sodium hydroxide/soil and sodium silicate/soil was 3% and 0.75% respectively. Alkaline activator solution was prepared by dissolving requisite quantities of pellets/powders in deionized water and allowing to cool for 24 h [1].…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Statistical data on the physical and mechanical properties of fibre reinforced alkali activated uncalcined earth based composite

et al. 2020

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This article presents statistical data on the reinforcing effect of three different fibres (sisal, eucalyptus pulp and polypropylene) on the physical and mechanical properties of an alkali activated natural soil produced using extrusion technique for the development of earth-based building materials. The experimental testing program involved characterisation of composite mixtures including a plain unreinforced stabilised matrix (which was plain soil mixed with alkali activator solution) as well as composite mixtures incorporating 3 volume fractions of fibres (0.5, 1.0 & 2.0 vol.%) of each fibre type. Composites were tested to evaluate physical properties (density and water absorption) and flexural response under 4-point loading in both dry and saturated conditions. The obtained values were statistically analyzed using one-way analysis of variance (ANOVA), followed by Tukey multiple comparison tests to ascertain the effect of the reinforcing fibres on the physical and mechanical properties of the composites. Results obtained show unique reinforcing effects of the different fibre types in the alkali activated matrices and the sensitivity of the earth based matrix to variations in fibre volume fraction. This data article is related to “Effects of Fibre Reinforcements on Properties of Extruded Alkali Activated Earthen Building Materials” [1].

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Advancing the agave‐soil nexus approach: A systematic review

Queiroz,

Ferreira,

Cerri

et al. 2024

Biofuels Bioprod Bioref

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Agave plants, found primarily in arid and semi‐arid regions, have been utilized by indigenous communities for various purposes for thousands of years. They currently serve as crops to produce alcoholic beverages and fibers. Despite their importance, there is limited understanding of the relationship between agave and soil. This article addresses some of the knowledge gaps regarding the interactions and benefits of the agave‐soil approach. Among all the documents reviewed, 153 discussed individual soil parameters (45 physical, 68 chemical, and 40 biological), 59 explored interactions between them, and 130 did not address soil aspects (i.e., soil was merely presented as a substrate for the growth and development of plants and was not examined in the study's findings). Moreover, the historical evolution of the research highlights two distinct periods (from 1985 to 2000 and between 2010 to 2023) of notable publication activity, with recent years witnessing a surge in studies involving soil management techniques, genetic improvement of agave species, bioremediation, and the use of residues for bioenergy, biofuel, and soil amendments. There is a notable increasing trend in diverse research areas interested in these interactions, reflecting a broader recognition of the importance of understanding soil functioning in agave cultivation. Indeed, from 2010 to 2023, the use of the keyword ‘soil’ increased by 96% in studies of agave cultivation. This shift in research trends suggests that scientific advances in agave cultivation and soil science can be expected, contributing to sustainable agriculture and the long‐term viability of agave‐based industries. This article underscores an opportunity for further research to optimize agave cultivation and processing (e.g., soil management and productivity), for different purposes while conserving soil health and promoting sustainable land‐use practices.

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Effects of fibre reinforcements on properties of extruded alkali activated earthen building materials

Cited by 33 publications

References 42 publications

Thermophysical and Mechanical Properties of Compressed Earth Blocks Containing Fibres: By-Product of Okra Plant and Polymer Waste

Thermophysical and Mechanical Properties of Compressed Earth Blocks Containing Fibres: By-Product of Okra Plant and Polymer Waste

Statistical data on the physical and mechanical properties of fibre reinforced alkali activated uncalcined earth based composite

Advancing the agave‐soil nexus approach: A systematic review

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