Impact of phase change materials on lightened earth hygroscopic, thermal and mechanical properties

Valorisation of stranded Laminaria digitata seaweed as an insulating earth material

“…Previous research has determined the maximum compressive strength for a percentage of longitudinal deformation ranging from 1.5% to 7.5%. As traditional cob, we chose the corresponding mechanical strength at 2% strain [23]. Our results show an improvement in mechanical strength and thermal conductivity with the increase of seaweed proportion (Table 4).…”

“…These fibers were then added randomly and mixed until getting a homogeneous composite. According to the usual method [23], the reed content used is 25% and the water content is 100%.…”

“…Mechanical strengths were obtained using a testing machine IGM with a capacity of 50 kN in accordance with AFNOR [NF EN-12390-5] (speed of 0.3 mm/ min for bending test) and AFNOR [NF EN 12390-3] (speed of 0.05KN/s for compressive test). The compressive strength at 2 % shrinkage is presented in this study because this value is more representative of the building behaviour [23].…”

“…Different studies show that lightweight earth mixes have a strong ability to interact with moisture [22,23]. Earth-straw and earth-hemp mixtures are among the insulating materials with the highest level of water buffering value (ability of a material to regulate the humidity of a room).…”

locos de Terra Compactada aditivados com Material de Mudança de Fase

“…Sabe-se que o consumo de energia nos edifícios referentes às necessidades de aquecimento e arrefecimento é cerca de 30% do consumo total de energia na União Europeia e cerca de 75% do consumo total de energia no setor da construção [13]. Nos últimos anos, novos métodos têm vindo a ser desenvolvidos para melhorar o comportamento térmico dos edifícios, tais como a possibilidade de incorporação de materiais de mudança de fase (PCM) em soluções construtivas [13][14][15][16].…”