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A platform for research: civil engineering, architecture and urbanism
Influence of accelerated aging on the properties of hemp concretes
HighlightsThis paper focuses on the influence of 75days of wetting and drying cycles on hemp concrete properties.Evolutions of the microstructure of hemp concrete can be observed.They are not sufficient to induce modifications of the functional properties of the materials.Mold growth occurs when the relative humidity is high (98% RH).A low value of the pH of the binder is necessary to observe mold growth.
AbstractThe use of vegetal concretes, such as hemp concrete, is growing for building insulation. They are constituted by vegetal aggregates embedded in a mineral binder. Hemp concretes are multifunctional materials: they have interesting thermal and acoustical performances and their hygrothermal behavior enables a natural moisture regulation. Currently, their use is limited by their lack of guarantees in terms of durability. This paper focuses on the influence of 75days of wetting and drying cycles on hemp concrete properties. It is shown that this aging induces modifications of the porosity of the materials and of their skeleton density. However, these evolutions of microstructure are not sufficient to lead to modifications of thermal and acoustical performances. This work has also shown that mold growth occurs when the relative humidity is high (98% RH) and when the pH of the binder has decreased due to its carbonation reaction.
Influence of accelerated aging on the properties of hemp concretes
HighlightsThis paper focuses on the influence of 75days of wetting and drying cycles on hemp concrete properties.Evolutions of the microstructure of hemp concrete can be observed.They are not sufficient to induce modifications of the functional properties of the materials.Mold growth occurs when the relative humidity is high (98% RH).A low value of the pH of the binder is necessary to observe mold growth.
AbstractThe use of vegetal concretes, such as hemp concrete, is growing for building insulation. They are constituted by vegetal aggregates embedded in a mineral binder. Hemp concretes are multifunctional materials: they have interesting thermal and acoustical performances and their hygrothermal behavior enables a natural moisture regulation. Currently, their use is limited by their lack of guarantees in terms of durability. This paper focuses on the influence of 75days of wetting and drying cycles on hemp concrete properties. It is shown that this aging induces modifications of the porosity of the materials and of their skeleton density. However, these evolutions of microstructure are not sufficient to lead to modifications of thermal and acoustical performances. This work has also shown that mold growth occurs when the relative humidity is high (98% RH) and when the pH of the binder has decreased due to its carbonation reaction.
Influence of accelerated aging on the properties of hemp concretes
Marceau, Sandrine (author) / Glé, Philippe (author) / Guéguen-Minerbe, Marielle (author) / Gourlay, Etienne (author) / Moscardelli, Sandrine (author) / Nour, Issam (author) / Amziane, Sofiane (author)
Construction and Building Materials ; 139 ; 524-530
2016-11-27
7 pages
Article (Journal)
Electronic Resource
English
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