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Composite Materials Based on Hemp and Flax for Low-Energy Buildings

The article presents the results obtained in the course of a study on prospective application of flax/hemp wastes as a filling material of lime-based composites in the construction of low-energy buildings. The utilized filler comprised the hydrated lime with clay and Portland cement used as additives. The analysis involved evaluation of such properties as porosity, density, thermal conductivity, absorptivity, permeability, as well as compressive and flexural strength. Depending on the quantity…

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The article presents the results obtained in the course of a study on prospective application of flax/hemp wastes as a filling material of lime-based composites in the construction of low-energy buildings. The utilized filler comprised the hydrated lime with clay and Portland cement used as additives. The analysis involved evaluation of such properties as porosity, density, thermal conductivity, absorptivity, permeability, as well as compressive and flexural strength. Depending on the quantity of the filler, the properties of the composite changed. This, in turn, enabled to evaluate whether the utilized composite met the thermal requirements established for low-energy buildings. Afterwards, the obtained data were cross-referenced with the results gathered in the case of a room built of autoclaved aerated concrete. In order to prevent reaching the critical surface humidity, the internal surface temperature had to be calculated. Moreover, the chances of interstitial condensation occurring in the wall made of the analyzed lime-flax-hemp composite were determined as well. The study showed that the composite exhibits low strength, low density, low thermal conductivity, and high absorptivity. The external walls made of the lime-flax-hemp composite receive a limited exposure to condensation, but not significant enough to constitute any threat. The requirements established for low-energy buildings can be met by using the analyzed composite.

Keywords: flax straw; hemp shives; low-energy buildings; natural composites; thermal conductivity.

Source: https://pubmed.ncbi.nlm.nih.gov/28772871/?utm_source=no_user_agent&utm_medium=rss&utm_campaign=pubmed-2&utm_content=1854v2hhZntXmjLwJ2c8ICqk5dHszkjKaegUwgxvTg53irEIHf&fc=20200804212743&ff=20200812014130&v=2.11.5

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Growth of Cannabidiol Oil (CBD Oil) Market Size Report Till 2025

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Hemp Seed Market Explosive Factors of Revenue by Major Manufacturers |Hempco Inc, Ecofibre …

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CBD Oil Market 2021 Global Industry Size, Reviews, Segments, Revenue, and Forecast to 2027

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