Hygrothermal behaviour and relative humidity buffering of unfired and hydrated lime-stabilised clay composites in a Mediterranean climate

Liuzzi, Stefania; Hall, Matthew; Stefanizzi, Pietro; Casey, Sean

doi:10.1016/j.buildenv.2012.12.006

Cited by 119 publications

(69 citation statements)

References 19 publications

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“…This phenomenon has been observed and described in other studies, and the obtained results are in good agreement with the literature [20]. This difference between the curves of sorption and desorption has already been studied in concrete [26] and bentonite [27].…”

Section: Sorptionedesorption Testssupporting

confidence: 93%

Experimental evaluation of hydric performances of masonry walls made of earth bricks, geopolymer and wooden frame

Fouchal

Gouny

Maillard³

et al. 2015

Building and Environment

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Section: Sorptionedesorption Testssupporting

confidence: 93%

Experimental evaluation of hydric performances of masonry walls made of earth bricks, geopolymer and wooden frame

Fouchal

Gouny

Maillard³

et al. 2015

Building and Environment

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“…However, it was demonstrated that earth had a higher permeability than most building materials [72], although the addition of a stabilizer could change this behavior. In the German standard on earth blocks [73], the use of a standard range between 5 and 10 is suggested, which is in accordance with the values measured on non-fibered earth blocks [74][75][76].…”

Section: Hygrothermal Properties 61 Water Vapor Permeabilitysupporting

confidence: 68%

Plant aggregates and fibers in earth construction materials: A review

Laborel-Préneron

Aubert

Magniont

et al. 2016

Construction and Building Materials

343

157

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Earth as a building material is increasingly being studied for its low environmental impact and its availability. Plant aggregates and fibers have been incorporated into the earth matrix in the aim of enhancing performance for thousands of years but scientific studies began quite recently. The present paper reviews the state of the art of research on the influence of these various natural and renewable resources in unfired earth materials such as compressed earth blocks, plasters, and extruded and stabilized blocks. This review, based on 50 major studies, includes characterization of the particles and treatments, and recapitulative tables of the material compositions, and the physical, mechanical, hygrothermal and durability performances of earth-based materials. A lack of references on hygroscopic and durability properties was observed. Future research orientations are thus suggested to promote and develop this type of sustainable material, which provides a solution for saving energy and natural resources. Highlights Earth-based products with plant aggregates as a sustainable material are reviewed.  Physicochemical and mechanical properties of plant aggregates or fibers are reviewed.  Mechanical, hygrothermal and durability performances of the composites are reviewed.  Further investigations are needed to promote these materials.

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“…Strong anisotropy was observed for both thermal and hygric properties due to the orientation of the clay platelets. In numerical simulations achieved to compare the influence of several types of indoor finishing, the advantages of using a clay-based coating rather than gypsum or acrylic stucco plaster have been demonstrated, regarding comfort and energy consumption [10]. Allinson and Hall [11] studied the hygrothermal performance of rammed earth using both experimental and numerical tools.…”

Section: On the Use Of Earth Mixed With Bio-based Materials In Constrmentioning

confidence: 99%

From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential

Labat

Magniont

Oudhof³

et al. 2016

Building and Environment

111

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. From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential. Building and Environment, Elsevier, 2016, 97, pp.69 -81. 10.1016/j.buildenv.2015 1 From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential ABSTRACTThe development of innovative materials has to respond to both environmental and energy concerns. Bio-based materials are relevant because they are made from renewable raw materials and are carbon neutral. Similarly, unprocessed earth has a very low embodied energy. In this paper, the basic hygrothermal properties of straw-clay samples provided by two French companies were determined. Mixes with densities lower than 450 kg.m -3 would be suitable for use as self-insulating material in current construction. In addition, the material showed a high sorption capacity and very high water vapour permeability. The measurements were then implemented in a numerical model in order to simulate the hygric response of a small room. The straw-clay mixture was found to have a moisture buffering effect of the same magnitude as walls made of hemp concrete and largely higher than conventional walls. The influence of various indoor finishing materials was investigated through additional simulations.

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Hygrothermal behaviour and relative humidity buffering of unfired and hydrated lime-stabilised clay composites in a Mediterranean climate

Cited by 119 publications

References 19 publications

Experimental evaluation of hydric performances of masonry walls made of earth bricks, geopolymer and wooden frame

Experimental evaluation of hydric performances of masonry walls made of earth bricks, geopolymer and wooden frame

Plant aggregates and fibers in earth construction materials: A review

From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential

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