However, there are some disadvantages such as limited mechanical properties, requiring more cement content to achieve same strength as normal-weight concrete
, greater shrinkage, creep, and prestressing loss in pre-tension structures .
Buttry, Behavior of stud shear connectors in lightweight and normal-weight concrete
Classification of concrete by density Types of concrete Density (Kg/[m.sup.3]) Lightweight concrete 800-2000 Normal-weight concrete
2001-2600 Heavy-weight concrete >2600 (EN 206: 2000) Table 3.
This technical brief describes shear tests on lightweight concrete prestressed girders, summarizes the database of lightweight concrete and normal-weight concrete
shear tests, describes a reliability analysis, and presents potential revisions to the LRFD Bridge Design Specifications relating to the shear resistance of lightweight concrete.
In their model, the unit weight (wc) of normal-weight concrete
was assumed to be 2300 kg/[m.sup.3].
When normal-weight concrete
cools after a fire, its residual strength varies depending on the temperature attained, mix proportions and loading conditions during heating.
The typical floor system is composed of a three-inch deck with 4.5 in of normal-weight concrete
above the deck acting with the steel framing to form a composite system.
Panels made of normal-weight concrete
, five-inch thick, provide an equivalent fire endurance of two hours.
block can be a suitable interior wall for food grade facilities, but lightweight block should be avoided due to its porous nature.
Mattock  derived an experimental constant to determine the shear transfer of concrete in his empirical shear friction model for a monolithic normal-weight concrete
The designed compressive strength of normal-weight concrete
([f'.sub.c]) was 22.5 MPa.
The database consists of data from 474 tests on lightweight concrete and normal-weight concrete