Physical Properties and Structure of Composite Made by Using Hemp Hurds and Different Binding Materials

Balčiūnas, Giedrius; Vėjelis, Sigitas; Vaitkus, Saulius; Kairytė, Agnė

doi:10.1016/j.proeng.2013.04.023

Cited by 76 publications

(44 citation statements)

References 16 publications

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“…Nevertheless, hemp bio-based materials can have variable mechanical properties in accordance with drying process (Benfratello et al 2013), curing conditions and time of demolding (Pavía et al 2015), nature of the binder matrix (Balčiūnas et al 2013;Dinh 2014;Stevulova et al 2013), composites design (Balčiūnas et al 2013), or hemp shives characteristics (Arnaud and Gourlay 2012;Stevulova et al 2012). Hemp shives characteristics can be length or nature of shives, including with hemp shives in compliance with the requirements of the label hemp aggregate of "Construire en chanvre", meaning "Build with hemp".…”

Section: Introductionmentioning

confidence: 99%

Impact of Bio-Aggregates Properties on the Chemical Interactions with Mineral Binder, Application to Vegetal Concrete

Bourdot

Magniont

Lagouin

et al. 2019

ACT

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Plant concretes were developed and are currently used as filling material in a timber frame. Their properties are strongly related to the bio-aggregates characteristics. In addition, since hemp shiv, the reference bio-based aggregate, has a limited availability, it is necessary to consider alternative bio-aggregates largely and locally available. Thus, this paper focused on identifying and understanding mechanisms of interaction between different bio-aggregates and mineral binders. To address this issue, the first objective was to determine the properties of five hemp shives and two alternative bioaggregates for vegetal lightweight concrete: corn and sunflower bark particles. The study of the chemical interactions between bio-aggregates and a pozzolanic binder was conducted on model pastes mixed with filtered solutions containing bio-aggregates extractives. The mechanical properties of the paste, as well as their hydration and their mineralogical evolution were studied. In the last part, the mechanical behavior of vegetal concretes was assessed. The results highlight a strong relation between the mechanical behavior of pastes and concretes and the extractive content of the different tested bio-aggregates. Finally, pastes appeared as a relatively good model to predict the behavior of concretes by following their early age performances: setting delay and 3-day mechanical strength.

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Section: Introductionmentioning

confidence: 99%

Impact of Bio-Aggregates Properties on the Chemical Interactions with Mineral Binder, Application to Vegetal Concrete

Bourdot

Magniont

Lagouin

et al. 2019

ACT

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“…The results are attributed to a reduction of inter particle voids that would reduce the volume fraction of thermally resistive air and increase the volume fraction of structural binder. It is proposed elsewhere [11][12][13][14][15][16] and widely accepted that compressive strength and thermal conductivity of hemp-lime follows an approximate linear relation to density for this reason.…”

Section: Introductionmentioning

confidence: 99%

The influence of the casting process on the internal structure and physical properties of hemp-lime

2016

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Bio-aggregate composites such as hemplime offer a more sustainable alternative to traditional walling infill material. Hemp-lime, whether in situ or prefabricated, is generally either cast or sprayed, which results in a directionally dependent, typically layered, physical structure. This paper considers the impact of compaction and layering on the directional thermal conductivity, compressive strength and internal structure of the material through use of a novel image analysis method. The results presented indicate that production variables have a significant, and crucially, directionally dependent impact on the thermal and mechanical properties of cast hemp-lime.

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“…Chemical composition of hemp hurds is as follows: cellulose (36-41%), hemicellulose (31-37%), lignin (19-21%), wax (<1%) and minerals (<4%) [4]. Cellulose is semicrystalline polysaccharide made with D-glucopyranose units linked together by b(1-4) glucosidal bond.…”

Section: Introductionmentioning

confidence: 99%

“…He showed that starch granules form a hardened paste that covers the wall of hurds evenly creating a homogeneous structure. A compressive strength of 1913 kPa was found for a density of 480 kg/m 3 compared to 1553 kPa for a cement binder composite with a density of 519 kg/m 3 [4]. Starch matrix reinforced by sisal fibers was also studied as a function of fiber content under different loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Influence of chemical modification on hemp–starch concrete

Sandrine

Vroman

Hoang

et al. 2015

Construction and Building Materials

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Physical Properties and Structure of Composite Made by Using Hemp Hurds and Different Binding Materials

Cited by 76 publications

References 16 publications

Impact of Bio-Aggregates Properties on the Chemical Interactions with Mineral Binder, Application to Vegetal Concrete

Impact of Bio-Aggregates Properties on the Chemical Interactions with Mineral Binder, Application to Vegetal Concrete

The influence of the casting process on the internal structure and physical properties of hemp-lime

Influence of chemical modification on hemp–starch concrete

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