Vantagens e desvantagens do concreto espumoso

concreto de espuma is a lightweight concrete made by mixing fine aggregates, agentes espumantes e água. It can be produced with natural or synthetic foaming agents.

Lightweight concrete has many advantages over conventional concrete, such as lower costs, faster construction, high energy efficiency and low environmental impact. It can be used in a wide range of applications including insulation, elementos estruturais, filling of voids and grouting.

Its properties include a high strength-to-weight ratio, peso leve, preservação de calor, sound insulation and corrosion resistance. It can be produced with a variety of admixtures, including lime, gesso, cement and fly ash.

Resistência à compressão: The compressive strength of concreto de espuma depends on the water-cement ratio, mix design and the type of foaming agent. It can be between 1.0 e 15 MPa, depending on the amount of foam and the grade of cement.

Isolamento térmico: The thermal properties of concreto de espuma are also affected by the pore structure and the size distribution of air voids. The narrower the air voids, the better the insulation.

Drying shrinkage: concreto de espumas have a lower drying shrinkage than ordinary concrete. This is because the air voids are more dense than the aggregate particles.

Corrosão: The cellular structure of concreto de espuma has a greater resistance to corrosion than the cellular structure of ordinary concrete. It is therefore an excellent choice for exterior protected constructions where corrosion is a problem.

Adding carbon fiber (CF) to the concreto de espuma increases its mechanical performance. No entanto, the CF must be preprocessed before being added to the concrete mixture.