Ecological, thermal and acoustical insulating composite from hemp shives and sapropel binder

Balčiūnas, Giedrius; Žvironaitė, Jadvyga; Vėjelis, Sigitas; Jagniatinskis, Aleksandras; Gaidučis, Sergejus

doi:10.1016/j.indcrop.2016.06.034

Cited by 55 publications

(32 citation statements)

References 17 publications

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“…The thermal conductivities of hemp shiv are in the range of bibliography. They are about 5 % higher than values found in (Rahim et al, 2016a) and 2 % lower than values given in (Balčiūnas et al, 2016). For rape straw, the values of thermal conductivity are close to the values found in literature too.…”

Section: Thermal Conductivitysupporting

confidence: 81%

Chemical and multi-physical characterization of agro-resources’ by-product as a possible raw building material

Viel

Collet

Lanos

2018

Industrial Crops and Products

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The aim of this paper is to find out the best valuation of agro-resources' by-products as new alternative raw building materials that meet to sustainable development requirement. Five agro-resources are considered: flax, hemp, corn, rape and wheat. In the present work, the chemical characteristics of bio-aggregates are studied by FTIR, Van soest method and Phenol sulfuric method to identify their composition. The investigated physical properties are particle size distribution, density, porosity, water absorption, thermal conductivity and moisture buffer value. The studied materials differ on a chemical and a thermal point of view while they all are excellent hygric regulators. These results suggest that agro-resources can be used as a raw building materials for several types of use: as lightweight aggregates or as binder.

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Section: Thermal Conductivitysupporting

confidence: 81%

Chemical and multi-physical characterization of agro-resources’ by-product as a possible raw building material

Viel

Collet

Lanos

2018

Industrial Crops and Products

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“…Compared with compressive strength at 10% deformation obtained in the literature, these values were lower. Indeed, Balčiūnas et al [31], who studied the hemp-sapropel (sediments that are rich in organic matter) composites, obtained better results as they ranged from 360 to 2080 kPa for density ranging from 220 to 410 kg/m3. Additionally, the hemp-starch composites developed by Bourdot et al [11] had slightly better mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

Hemp-Straw Composites: Gluing Study and Multi-Physical Characterizations

et al. 2019

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In order to meet the requirement of sustainable development, building materials are increasingly environmentally friendly. They can be partially or fully bio-based or recycled. This paper looks at the development of fully bio-based composites where agro-resources are valued as bio-based aggregates (hemp) and as binding materials (wheat). In a previous work, a feasibility study simultaneously investigated the processing and ratio of wheat straw required to ensure a gluing effect. In this paper, three kinds of hemp-straw composites are selected and compared with a hemp-polysaccharides composite. The gluing effect is analyzed chemically and via SEM. The developed composites were characterized multi-physically. They showed sufficiently high mechanical properties to be used as insulating materials. Furthermore, they showed good thermal performances with a low thermal conductivity (67.9–69.0 mW/(m · K) at 23 ° C, dry).

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“…The moisture content of the hemp fiber-based composite is increased with increasing fiber loading and when the diameter of the hemp fiber is reduced. This behavior can be attributed to the improved fiber surface area at lower diameters, leading to a higher availability of the polar -OH group in the resin-fiber system [156,223,224]. For example, the increasing content of hemp fibers in unsaturated polymer resin induces the composite to absorb a higher amount of moisture, leading to a great reduction of the tensile and flexural properties of the composite [225].…”

Section: Hemp Fiber Compositesmentioning

confidence: 99%

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

Al-Maharma

Al-Huniti

2019

J. Compos. Sci.

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Natural composites can be fabricated through reinforcing either synthetic or bio-based polymers with hydrophilic natural fibers. Ultimate moisture absorption resistance at the fiber–matrix interface can be achieved when hydrophilic natural fibers are used to reinforce biopolymers due to the high degree of compatibility between them. However, the cost of biopolymers is several times higher than that of their synthetic counterparts, which hinders their dissemination in various industries. In order to produce economically feasible natural composites, synthetic resins are frequently reinforced with hydrophilic fibers, which increases the incompatibility issues such as the creation of voids and delamination at fiber–matrix interfaces. Therefore, applying chemical and/or physical treatments to eliminate the aforementioned drawbacks is of primary importance. However, it is demonstrated through this review study that these treatments do not guarantee a sufficient improvement of the moisture absorption properties of natural composites, and the moisture treatments should be applied under the consideration of the following parameters: (i) type of hosting matrix; (ii) type of natural fiber; (iii) loading of natural fiber; (iv) the hybridization of natural fibers with mineral/synthetic counterparts; (v) implantation of nanofillers. Complete discussion about each of these parameters is developed through this study.

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Ecological, thermal and acoustical insulating composite from hemp shives and sapropel binder

Cited by 55 publications

References 17 publications

Chemical and multi-physical characterization of agro-resources’ by-product as a possible raw building material

Chemical and multi-physical characterization of agro-resources’ by-product as a possible raw building material

Hemp-Straw Composites: Gluing Study and Multi-Physical Characterizations

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

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