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AAC WORLDWIDE %u2022 2.2025 SCIENCE & INNOVATION 37Test resultsThree sets of BAAC specimens, each comprising three replicas, were produced in the laboratory, respectively with final densities of 350, 500 and 850 kg/m3. Table 2 shows the results of the tests carried out according to the technical reference standard, to determine the mechanical resistance to compression [5] and the %u03bb value of the thermal conductivity [6].ConclusionsThe research carried out by ENEA researchers and technicians has made it possible to patent an innovative autoclaved aerated concrete, called BAAC (Bio-aerated autoclaved concrete) [7]. This was achieved by:%u2022 demonstrating the possibility of using anaerating agent other than aluminium powder/paste in autoclaved aerated concrete,%u2022 establishing that the reaction between thecomponents of the aerating agent, as a result ofwhich gaseous oxygen is formed, is independentof the presence of other materials/components,%u2022 developing the mix design of BAAC, and%u2022 verifying the laboratory repeatability of theproduction process and test results, in termsof physical and mechanical characteristics.Further studies involved the use of fibres, alternative materials to cement, and food industry waste as a source of yeast.Acknowledgements%u00a0The research was funded by ENEA as part of its Proof of Concept programme, which aims to narrow the gap between research and industrial application and support innovation in the manufacturing sector. %u25cfReferences[1] European Commission, Proposal for a Directive of the European Parliament and of the Council on energy efficiency,Brussels, 2021.[2] ASTM C1693-11(2017) Standard Specification for Autoclaved Aerated Concrete (AAC) - Book of Standards:Volume: 04.05 Developed by Subcommittee: C27.60 DOI:10.1520/C1693-11R17 ICS Code: 91.100.30.[3] Ducman V,; Korat L.: Characterization of geopolymer flyash based foams obtained with the addition of Al powderor H%u2082O%u2082 as foaming agents. Mater Char 2016[4] Switala J, Loewen PC. Diversity of properties amongcatalases. Arch Biochem Biophys. 2002 May 15; 401 (pp.145-54).[5] UNI EN 679:2005 Determination of the compressivestrength of autoclaved aerated concrete.[6] ISO 8301:1991 Thermal insulation %u2014 Determination ofsteady-state thermal resistance and related properties %u2014Heat flow meter apparatus.[7] P. De Fazio, G.Leter, G. F. Lista, C. Sposato, M.B. Alba,Patent WO/2019/049005: Process for preparing bioaeratedautoclaved concrete, 2019.Test seriesDensity[kg/m3]Compressive strength[MPa]Thermal conductivity[W/mK]A 350 1.08 0.090B 500 3.10 0.115C 850 9.20 0.316Table 2: BAAC test results.Follow us onlinkedin.com/company/aac-worldwide