Myth #1 – The absorption of a lightweight aggregate, or the type of raw material from which it is made, is a primary factor that defines the physical properties of the aggregate and the strength, durability, and soundness of structural concrete in which the lightweight aggregate is used.
Myth #2 – Lightweight concrete floors take much longer to dry than normal weight concrete floors.
Myth #3 – Lightweight concrete always has a reduced tensile strength compared to normal weight concrete of the same compressive strength, so aspects of design related to tensile strength, such as shear and development length of reinforcement, must be adjusted.
This article introduces a second direction for the series by presenting a topic for which structural lightweight concrete provides significant design advantages. Specifically, this article discusses design advantages offered by the common and efficient use of structural lightweight concrete on composite metal decks for floors in buildings.
This fifth article follows up on the fourth by considering the cost of using lightweight concrete for floor slabs in buildings by addressing the following myth or misconception about lightweight concrete in buildings.
This article extends the comparison between normalweight and lightweight concrete to the embodied energy and CO2 emissions involved in the construction of a typical building. Such a comparison is significant as sustainability is becoming a part of the design process.