Engineer's Corner

MYTHS AND MISCONCEPTIONS #1

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.

MYTHS AND MISCONCEPTIONS #2

Myth #2 – Lightweight concrete floors take much longer to dry than normal weight concrete floors.

MYTHS AND MISCONCEPTIONS #3

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.

MYTHS AND MISCONCEPTIONS #4

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.