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Communication Dans Un Congrès Année : 2022

Impact of Surfactant Type on Performances of Gypsum Foams

Résumé

The production of lightweight materials for the building industry contributes to the sustainable development. To produce such materials, foaming is a process commonly used to trap air bubbles and achieve a range of low densities. A sufficiently low thermal conductivity and an acceptable ability to regulate humidity variations in order to limit overall energy consumption are the sought properties. In this study, a direct foaming method is applied to formulate gypsum foams using a commercial Plaster and biobased foaming agents: an egg white protein (albumin) and a commercial protein. An anionic surfactant α- olefin sulphonate sodium salt is used as a reference surfactant. By varying the mixing time, protein content and water content, gypsum foams were produced with different densities varying from 300 to 750 kg/m3. The foam volume is measured continuously during the mixing step and the foam homogeneity is controlled. The densities of fresh foams and of the hardened foams are used to identify the links between formulation and foams properties. Use performances as thermal conductivity, Moisture Buffer Value measurements and mechanical performances are performed on a selection of gypsum foams. The results appear directly linked to the porosity and pore connection of the foams. The obtained results highlight the contribution of surfactant type to the performances of gypsum foams. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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Dates et versions

hal-03468852 , version 1 (07-12-2021)

Identifiants

Citer

N. Mortada, Annabelle Phelipot-Mardele, C. Lanos. Impact of Surfactant Type on Performances of Gypsum Foams. 6th International Conference on Geotechnics, Civil Engineering and Structures, CIGOS 2021, Oct 2021, Ha Long, Vietnam. pp.667-675, ⟨10.1007/978-981-16-7160-9_67⟩. ⟨hal-03468852⟩
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