Lightweight concrete mix is a construction material that contains a lot less mass than normal concrete. It is used to reduce the dead weight of structures and for reducing the load on foundations and other structural components. This is done by replacing dense natural aggregates with lighter aggregates or adding air into the mixture. The result is a concrete with a density between 800 kg/m3 and 2000 kg/m3. This type of concrete is also known as no-fines, aerated or foamed concrete.

There are several methods to achieve lightweight concrete, but the most common is using aeration. This involves adding tiny air pockets into the concrete mix. These can be produced in a number of ways, including using chemical reactions with hydrogen peroxide or by adding aluminum powder to the batch mix. Another method is using a pre-mixed foam to stir into the concrete slurry. This creates the same effect as aeration, but it is much faster and simpler.

The resulting concrete has a lower specific gravity than normal concrete. This makes it more buoyant and can be used to make floating floors and other lightweight structures. It also has good fire resistance and low thermal conductivity.

It is easier to handle and transport than normal concrete, so it is a great choice for building projects that require a lot of material to be transported long distances. It is also more durable than normal concrete and can be used in places where the structure may be exposed to extreme conditions. It is also less likely to crack if the structure is subjected to lateral loads, such as earthquakes. It is also more resistant to rot and termite infestations.