What is the air-dry density range of lightweight concrete?

Lightweight concrete is characterized by its lower density compared to conventional concrete, primarily due to the use of lightweight aggregates such as expanded clay, shale, or pumice. The air-dry density range of lightweight concrete typically falls between 85 to 115 pounds per cubic foot (lb/ft³). This range is significant as it allows for ease of handling and reduces the overall weight of structures, making lightweight concrete an advantageous choice in various construction scenarios where lower dead loads are desired.

In construction and engineering practices, understanding the properties of lightweight concrete is crucial. The chosen density range reflects its ability to meet specific performance criteria while ensuring structural integrity. The other options provided do not align with the generally accepted density range for lightweight concrete, as they either fall below or exceed the recognized limits, which is critical knowledge for concrete inspectors and professionals in the field.