ABSTRACT
Aerated or foamed cellular concrete (CCE) is a lightweight concrete that differs from the others by the presence of foam inside the mortars. Air bubbles that govern the behavior of these concretes form this foam. Parameters such as dosage of the additive, volume of bubbles generated and others must be better understood and determined, as they directly influence the formulation, workability, density and resistance of the CCE. This paper presents a study of the influence of different dosages of a foam additive on the formulation and properties of different CCEs. The additive dosage was evaluated as a function of the density of the concrete. The generation of air bubbles occurred through the mechanical action of the mixer, was denominated CBAM concrete. The air bubble content (Bar) increases considerably with the increase of the additive (Ad/c) dosage in the CBAMs up to a given dosage, the same occurs with the reduction of the density of different CBAMs. The compressive strength is also changed considerably to a certain additive dosage. The highest compressive strength, at 28 days, obtained was 19.5 MPa, which can guarantee application in walls with structural ends.
Keywords:
Cellular concrete; chemical additives; method of dosing; properties
