Weathering of earth-painted surfaces: Environmental monitoring and artificial aging

Cappai, Marta; Casnedi, Ludovica; Carcangiu, Gianfranco; Delogu, Francesco; Pozzi-Escot, Denise; Pacheco, Gianella; Pia, Giorgio; Meloni, Paola

doi:10.1016/j.conbuildmat.2022.128193

Cited by 6 publications

(1 citation statement)

References 23 publications

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“…Despite earth-based materials having reduced design flexibility and low mechanical strength (structure vulnerability, earthquakes), they are still compatible with residential architecture applications, especially when paired with other materials. However, an aspect not to be underestimated, from a Materials Science point of view, includes the high variability and heterogeneity of the material, as well as its pronounced sensitivity to water, which can modify its performance, thereby compromising its durability [ 41 , 42 , 43 , 44 ]. Moisture can severely impact the mechanical and thermal performance.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties of Eco-Friendly Earthen Materials Stabilized with Bio-Based Polymers: Experimental Data and Modeling Procedure for Improving Mix-Design

Cappai,

Shoukat,

Pilia

et al. 2024

Materials

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The fight against climate change has delineated new objectives, among which one of the most crucial is the replacement of high-energy-intensity materials in the construction sector with more sustainable and thermally efficient alternatives to reduce indirect emissions. Consequently, the thermal properties of materials assume fundamental importance. In this regard, the large-scale use of earth represents a promising option, not only due to its widespread availability but especially for its minimal embodied energy. However, to enhance its durability, it is necessary to stabilize the mixtures of raw materials. This study analyzes experimental systems based on earth stabilized with bio-based polymers to evaluate their thermal properties and how these vary depending on the selected mix-design. The experimental measurements showed thermal properties comparable to conventional materials. As expected, thermal conductivity increases when porosity decreases. The minimum value is equal to 0.216 W/m·K vs. a porosity of 43.5%, while the maximum is 0.507 W/m·K vs. a porosity of 33.2%. However, the data obtained for individual systems may vary depending on the topological characteristics, which were analyzed through a model for granular materials. The modeling suggests correlations between microstructures and thermal behaviour, which can be useful to develop tools for the mix-design procedure.

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