Reuse of waste oils in the treatment of wood aggregates

Ledhem, A; Dheilly, Rose-Marie; Quéneudec, M.

doi:10.1016/s0956-053x(99)00332-3

Cited by 16 publications

(3 citation statements)

References 9 publications

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“…The water absorption increases with the fiber content (Figure 9); this finding is due to the highly hygroscopic nature that induces porosity in the composite [20,21]. These results are consistent with those found by Fertikh et al [13].…”

Section: Water Absorptionsupporting

confidence: 90%

Enhancing the Performance and Durability of Eco-Friendly Mortar with Diss Fibers (Ampelodesmos mauritanicus)

Abdelouahed,

Kechkar,

Hebhoub

et al. 2023

RCMA

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This study investigates the potential use of Diss fibers as a sustainable alternative in ecoconstruction and civil engineering. The research introduced Diss fibers as aggregates, partially replacing conventional sand in mortar by volume with proportions of 1/3 and 2/3, aiming to create an eco-friendly and lighter mortar. In this context, various properties of the fresh mortars, such as density, workability, and occluded air content, were examined. Additionally, the mechanical performance in the hardened state, including compressive and flexural strengths, was evaluated. Durability parameters such as water absorption, capillary absorption, and resistance to aggressive media were also assessed. The results demonstrated that mortars incorporating Diss fibers were lighter and more workable. The inclusion of these fibers enhanced the flexural strength and chemical resistance, as evidenced by the low percentages of mass loss in aggressive solutions such as HCl and CH3COOH. However, the introduction of the fibers negatively influenced the mechanical resistance and water absorption-both by immersion and capillaritydue to the porosity introduced into the composites.

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Section: Water Absorptionsupporting

confidence: 90%

Enhancing the Performance and Durability of Eco-Friendly Mortar with Diss Fibers (Ampelodesmos mauritanicus)

Abdelouahed,

Kechkar,

Hebhoub

et al. 2023

RCMA

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“…Modification of the matrix composition, by addition of pozzolanic compound addition or by applying a carbonation process, was carried out to overcome the problems associated with the presence of alkaline compounds [46][47][48][49][50][51]. The stability of the natural fibres was improved by applying specific procedures, such as interface coatings, chemical structure modification, chemical products additions or combined processes [29,[52][53][54][55][56][57][58][59][60][61].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Environmentally Sustainable Cement Composites Based on Wheat Straw and Perlite

et al. 2022

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Environmentally sustainable cement mortars containing wheat straw (Southern Italy, Apulia region) of different length and dosage and perlite beads as aggregates were prepared and characterised by rheological, thermal, acoustic, mechanical, optical and microstructural tests. A complete replacement of the conventional sand was carried out. Composites with bare straw (S), perlite (P), and with a mixture of inorganic and organic aggregates (P/S), were characterised and compared with the properties of conventional sand mortar. It was observed that the straw fresh composites showed a decrease in workability with fibre length decrease and with increase in straw volume, while the conglomerates with bare perlite, and with the aggregate mixture, showed similar consistency to the control. The thermal insulation of the straw mortars was extremely high compared to the sand reference (85–90%), as was the acoustic absorption, especially in the 500–1000 Hz range. These results were attributed to the high porosity of these composites and showed enhancement of these properties with decrease in straw length and increase in straw volume. The bare perlite sample showed the lowest thermal insulation and acoustic absorption, being less porous than the former composites, while intermediate values were obtained with the P/S samples. The mechanical performance of the straw composites increased with length of the fibres and decreased with fibre dosage. The addition of expanded perlite to the mixture produced mortars with an improvement in mechanical strength and negligible modification of thermal properties. Straw mortars showed discrete cracks after failure, without separation of the two parts of the specimens, due to the aggregate tensile strength which influenced the impact compression tests. Preliminary observations of the stability of the mortars showed that, more than one year from preparation, the conglomerates did not show detectable signs of degradation.

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“…Thermal conductivity increases proportional to both the intensity of the processing and the evolution in the density. Since the thermal conductivity of oil is higher than that of air, the filling of wood cells induces a rise in the composite's conductivity 70 .…”

Section: Development Of Recycled Concretementioning

confidence: 99%

A structural and physico-chemical investigation of mineral/organic composites as novel components of engineered fill

Tyrologou¹,

Τυρολόγου²

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Sustainable engineering fill represents an increasingly important approach to the management of bulk non-marketable materials and the restoration of brownfield land, particularly land arising from mining and metallurgical activities. Embankments and restoration of brownfield sites are examples that already make use of engineering fill from bulk wastes in order to provide stable ground. Biostore, the subject of this research, is a novel type of stable engineering rockfill proposed for composite utilisation of bulk organic and mineral material, which would otherwise be waste.The thesis presents a literature review regarding environmental problems of bulky wastes such as coarse mineral wastes, construction and demolition material, green waste, fine pozzolanic pulverised fuel ash and digested sewage sludge. It also discusses current remediation practices for brownfield land. The main body of the thesis reports methods and results of an environmental and geotechnical study of the composites, based on laboratory investigation.Formulation of the composites using statistical factorial design has ensured proper understanding of component interaction and subsequent optimisation of the composite parameters. Solidification and stabilisation of the materials took place by compacting and cementing the wastes together. The coarse minerals formed a skeletal support whereas fine pozzolanic material (sewage sludge and pulverised fuel ash) cemented the components together with the aid of calcium oxide.The composites were tested for their porosity and micro-structure using novel methods (for these kinds of materials), e.g., nuclear magnetic resonance and super-critical drying. Furthermore, the Biostore was tested for uniaxial and triaxial strength, hydraulic conductivity, chemical leaching and cementatious mineralogy.The investigation demonstrated an inverse linear relation between decreasing porosity and increasing uniaxial strength with time. Micro-structural investigation revealed that this was due to crystallisation of ettringite and portlandite. The results indicate the potential for application of Biostore at a field scale.

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Reuse of waste oils in the treatment of wood aggregates

Cited by 16 publications

References 9 publications

Enhancing the Performance and Durability of Eco-Friendly Mortar with Diss Fibers (Ampelodesmos mauritanicus)

Enhancing the Performance and Durability of Eco-Friendly Mortar with Diss Fibers (Ampelodesmos mauritanicus)

Experimental Investigation on Environmentally Sustainable Cement Composites Based on Wheat Straw and Perlite

A structural and physico-chemical investigation of mineral/organic composites as novel components of engineered fill

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