Light gauge steel homes projects
Foam concrete, also called cellular concrete, is typically made of water, cement and foam. This mixture may also include aggregates or chemicals added to change its physical properties. It is a lightweight material with low density and limited strength in most applications. It is typically a self-levelling and compacting material that is more resistant to cracking and shrinkage than standard concrete mixes.
Perlite insulating concrete consists of an appropriate mixture of portland cement, perlite aggregate and water. Its weight can be varied in the range of 20 to 50 pounds per cubic foot, depending on the mix design selected. This is in comparison to sand and gravel concrete which weighs 140 to 150 pounds per cubic foot and the 60 to 120 pounds per cubic foot weight of expanded slag, shale or clay. Because of its exceptionally light weight, perlite concrete is not considered a true structural concrete. It has an adequate strength for floor fills, light structural roof decks place over form boards, and metal lath or paper backed wire mesh, and makes an economical and versatile insulation fill over metal decking and structural concrete. It can also be sprayed as a fire retardant backup for metal curtain walls.
Expanded polystyrene (EPS) concrete is a lightweight, low strength material with good energy-absorbing characteristics. However, due to the light weight of EPS beads and their hydrophobic surface, EPS concrete is prone to segregation during casting, which results in poor workability and lower strength. Its mechanical properties were investigated as well. EPS concrete with a density of 800–1800 kg/m3 and a compressive strength of 10–25 MPa can be made by partially replacing coarse and fine aggregate by EPS beads. Fine silica fume greatly improved the bond between the EPS beads and cement paste and increased the compressive strength of EPS concrete. In addition, adding steel fiber significantly improved the drying shrinkage.
Autoclaved aerated concrete (AAC) is made with fine aggregates, cement, and an expansion agent that causes the fresh mixture to rise like bread dough. In fact, this type of concrete contains 80 percent air. In the factory where it is made, the material is molded and cut into precisely dimensioned units. Cured blocks or panels of autoclaved aerated concrete are joined with thin bed mortar. Components can be used for walls, floors, and roofs. The lightweight material offers excellent sound and thermal insulation, and like all cement-based materials, is strong and fire resistant. In order to be durable, AAC requires some type of applied finish, such as a polymer-modified stucco, natural or manufactured stone, or siding.
Non autoclaved lightweight aerated concrete is made of cement, sand, limestone, fly ash and, water and aerated agent. It can be used in the construction site directly. NAAC is a good option for partition wall infill. It has fire rating class A, good sound and thermal insulation. In this video you can see how it works.