Lightweight concrete blocks are used for load-bearing walls. These blocks have better thermal efficiency and are lighter than conventional brick or stone units. They also reduce the dead load on the structure.
This lightweight concrete product can replace dense natural aggregates. It has been used in multistory buildings, bridges, and sewer systems.
To make a lightweight concrete block, a mixture of cement and lightweight coarse aggregates are poured into a mold. The resulting block weighs between 85 and 105 pounds per cubic foot.
In order to ensure the proper consistency of the concrete, ASTM C 90 guidelines must be followed. Moreover, the texture must be uniform.
Lightweight concrete has lower shrinkage and thermal conductivity. This type of concrete also offers high heat resistance. Furthermore, it has a higher fire rating.
Besides these benefits, lightweight blocks are more durable than traditional units. They are designed to last for decades. Compared to standard 8x8x16-inch blocks, they weigh 25 percent less.
This lightweight building material is made of high-quality concrete. It is ideal for use in indoors or in environments without weather effects.
It is available in three weight classifications: Normal, Medium, and Light. Each unit meets the same ASTM C 90 standards for strength, color, and texture.
Unlike traditional units, it has a four-hour fire resistance rating. Moreover, it reduces labor costs and offers durability and strength.
Lightweight aggregates are characterized by their low density and fine particle size. Because of this, it is ideal for use in pre-cast concrete blocks.