Foaming Agents from Proteins of Microbial Synthesis for Manufacturing Cellular Concretes

The problem of receiving the key component of foam concretes production – a foaming agent – is considered. Two approaches to its solution are proposed. The first one is the use of mycelial waste of the bio-chemical industry containing large amounts of proteins of a microbic synthesis. Waste of antibiotics production is used as mycelia waste. The second one is a synthesis of proteins with the help of microorganisms on the food industry waste. These wastes are curd and cheese whey, distillery stillage. For enrichment of these wastes with proteins, microorganisms were selected and conditions of their cultivation on wastes were developed. The base of the foaming agent is a protein hydrolysate of microbic synthesis. Conditions of the protein hydrolysis are shown. Properties of foaming agents have been studied. Foam expansion ratio of these foaming agents is 18–23, water segregation per an hour – 0%, the foam stability factor in the cement mortar – 0.9–0.92. The quality of the developed foaming agents is not inferior to the existing analogues, but cheaper. Compositions of foam concretes on the basis of these foaming agents have been developed, and their properties have been investigated. It is established that qualities of foam concretes on the basis of foaming agents obtained are not inferior to foam concretes produced on the basis of the foaming agent “Penostrom”.

V.D. CHERKASOV¹ , Doctor of Sciences (Engineering), Corresponding member of RAACS (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.I. BUZULUKOV¹ , Doctor of Sciences (Engineering);
Yu.M. BAZhENOV² , Doctor of Sciences (Engineering), Academician of RAACS (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ N.P. Ogarev Mordovia State University (68, Bolshevistskaya Street, Saransk, 430005, Republic of Mordovia, Russian Federation)
² National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

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