Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Impact of Surfactant Type on Performances of Gypsum Foams
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.
Impact of Surfactant Type on Performances of Gypsum Foams
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.
Impact of Surfactant Type on Performances of Gypsum Foams
Lecture Notes in Civil Engineering
Ha-Minh, Cuong (Herausgeber:in) / Tang, Anh Minh (Herausgeber:in) / Bui, Tinh Quoc (Herausgeber:in) / Vu, Xuan Hong (Herausgeber:in) / Huynh, Dat Vu Khoa (Herausgeber:in) / Mortada, Nourhan (Autor:in) / Phelipot-Mardelé, Annabelle (Autor:in) / Lanos, Christophe (Autor:in)
CIGOS 2021, Emerging Technologies and Applications for Green Infrastructure ; Kapitel: 67 ; 667-675
28.10.2021
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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