Concrete is a construction essential that has been used for centuries to create strong, durable structures. While traditional concrete has numerous advantages, it can be too heavy for certain applications. That is where lightweight concrete comes in as a more versatile option.
Builders use different types of lightweight concrete for a variety of applications. Some of these include using it in precast elements to reduce weight and simplify the fabrication process on-site. Additionally, builders use it in energy efficient applications to increase thermal and acoustic insulation in their buildings.
Lightweight concrete is made with alternative aggregates that are lighter than traditional aggregates like gravel and sand. These alternate aggregates may include porous rock like pumice, manufacturing byproducts such as fly ash or slag, or expanded materials like clay, shale, or slate that have been treated through a heat process to expand them. The concrete is then mixed with a cement slurry or sometimes cement powder and other plasticizer admixtures to improve its workability. In some cases, the sand fraction of the mix is completely omitted to make what is known as “no-fines” concrete.
Lightweight concrete also has some unique properties that make it a great choice for cladding walls and other decorative elements, like fire pits. It has excellent fire resistance and is able to withstand the harshest weather conditions. This allows builders to create a more modern, sophisticated look for their projects. In addition, lightweight concrete can be colored to suit a specific design or aesthetic.
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