Foamed Concrete Based on Foaming Agent of Various Origins – Differences and Similarities

Recently, there has been an increase in interest in lightweight cement composite, which is foamed concrete. Research on most foamed concretes focuses on determining the properties of foamed concrete of a given composition. While the properties of foamed concrete are closely related to its composition. Therefore, the aim of this article was to compare two types of foamed concrete with the same densities produced from different compositions, including a foaming agent of different origins. Foamed concrete mixes with the assumed density of hardened foamed concrete of 600, 800 and 1000 kg/m3 were designed. The comparison was made in terms of porosity, microstructure and compressive strength. Foamed concretes with a density tolerance of ±50 kg/m3 and 5% compared to the target density were obtained. The porosity of both foamed concretes for all densities was comparable, and the relationship between density and porosity was linear. For foamed concrete based on a protein foaming agent, lower compressive strength was obtained, which was related to the lower class of cement used.