Characterization of Plant‐Based Aggregates

Picandet, Vincent

doi:10.1002/9781118576809.ch2

Cited by 14 publications

(9 citation statements)

References 38 publications

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“…These distributions change whether they are based on the number of cells (Fig. is not surprising because natural phenomena are often multiplicative with asymmetric data and hence are well described by log-normal distributions [38]; this is especially relevant for morphological characterisations as already observed elsewhere [39,40]. volume-weighted diameters is also more relevant when describing foams as periodic repetitions of unit cells, many small cells being only at the junction of bigger ones.…”

Section: Critical Morphological Analysismentioning

confidence: 94%

Preparation and structural characterisation of model cellular vitreous carbon foams

Letellier

Szczurek

Basso

et al. 2017

Carbon

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Section: Critical Morphological Analysismentioning

confidence: 94%

Preparation and structural characterisation of model cellular vitreous carbon foams

Letellier

Szczurek

Basso

et al. 2017

Carbon

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“…A particle size analysis was performed by image analysis using ImageJ software. This increasingly used method [40][41][42] is particularly interesting in the case of non-spherical particles. Size distribution and morphology (width and length) were determined using this method whereas traditional mechanical sieving analysis would have given only the width.…”

Section: Particle Size Analysismentioning

confidence: 99%

“…The grading curves are presented in Fig.8. Averages and standard deviations of the major and minor axes, EAD or aspect ratio were calculated from equations 8 and 9 [40] and are presented in Table 1.…”

Section: Particle Size Analysismentioning

confidence: 99%

Characterization of Barley Straw, Hemp Shiv and Corn Cob as Resources for Bioaggregate Based Building Materials

Laborel-Préneron

Magniont

Aubert

2017

Waste Biomass Valor

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Expanding the use of low-environmental impact materials in the field of building materials is a major aim in a context of sustainable development. These alternative materials should be non-polluting, eventually recycled, and locally available. Bioresources are already used in some building materials but few studies have investigated their relevance in such applications. The aim of this paper is to evaluate the suitability of three kinds of vegetal aggregates: barley straw, hemp shiv and corn cob. The availability of these bioresources, extracted from a French database, is discussed, as are their physical properties and chemical compositions. Their microstructure is described with SEM images and their particle size distributions are provided through image analysis. Sorption-desorption isotherms are measured by a Dynamic Vapour Sorption system. Bulk density, thermal conductivity and water absorption are also quantified. The results highlight a tubular structure for the three different aggregates, with low bulk density and thermal conductivity (0.044, 0.051 and 0.096 W.m-1 .K-1 respectively for straw, hemp shiv and corn cob) and high water absorption, especially for barley straw and hemp shiv (414 and 380% vs. 123% for corn cob). Their hygric regulation capacity is also sufficiently good, with a water sorption of between 20 and 26% at 95% of relative humidity. These plant aggregates could therefore be used as additions in an earth matrix, or a hydraulic, pozzolanic, air lime or gypsum binder, or just as loose-fill insulation material. However, future research should focus on their resistance to fire and bacterial growth to validate this approach.

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“…The grading curves are presented in Figure 8. Averages and standard deviations of the major and minor axes, EAD and aspect ratio were calculated from Equations 5 and 6 according to Picandet et al, [36] and are presented in Table 3.…”

Section: Particle Size Analysismentioning

confidence: 99%

Comparison of barley and lavender straws as bioaggregates in earth bricks

Giroudon

Laborel-Préneron

Aubert

et al. 2019

Construction and Building Materials

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Physical differences between straws lead to distinct behaviour of the composites  Barley straw improves thermal behaviour but reduces mechanical strength  Lavender straw improves durability and resistance to fungal growth ABSTRACT Nowadays, for environmental reasons, the demand for bio-based building materials is increasing. The number of studies focusing on earth building bricks with addition of plant aggregates is growing. In this study, barley and lavender straws were considered as bioaggregates in an earth matrix. Their characterization revealed distinct shape, size and porosity. Composites including 3% and 6% by mass of each bioaggregates were then elaborated. Their performances were investigated and compared in terms of mechanical and thermal properties, durability of the composite materials and resistance to fungal growth. The mixture with 3% of lavender straw showed satisfactory durability results while barley straw brought better thermal properties.

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Characterization of Plant‐Based Aggregates

Cited by 14 publications

References 38 publications

Preparation and structural characterisation of model cellular vitreous carbon foams

Preparation and structural characterisation of model cellular vitreous carbon foams

Characterization of Barley Straw, Hemp Shiv and Corn Cob as Resources for Bioaggregate Based Building Materials

Comparison of barley and lavender straws as bioaggregates in earth bricks

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