Aggregates
Aggregates are coarse particulate rock-like material consisting of a collection of
particles ranging in size from < 0.1 mm to > 50 mm. It includes gravel, crushed
rock, sand, recycled concrete, slag, and synthetic aggregate.
Aggregate is a granular material, such as sand, gravel, crushed stone,
crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a
hydraulic cementing medium to produce either concrete or mortar. Types of
aggregates include Coarse aggregate and fine aggregate. The aggregate of each
type is further sub-divided into many types and classification based on its size.
The technique of Sieve Analysis is used for gradation of aggregate for use in
concrete and for other applications.
Aggregate is called bound material when it is mixed with cement or binding
materials and referred to as unbound material when used without cement or
binding materials.
Aggregate Origin and Geology
Aggregates are commonly obtained by crushing naturally occurring rock. The
properties of aggregates depend on the parent rock which can be igneous,
sedimentary, or metamorphic. Aggregates are evaluated through tests to
determine their suitability for various applications. Mineralogy, grain size and
texture, and petrographic description of rock samples are also used to evaluate
suitability.
Types of Aggregates
Coarse Aggregate
Aggregates are coarse particulate rock-like material consisting of a collection of
particles ranging in size from < 0.1 mm to > 50 mm. It includes gravel, crushed
rock, sand, recycled concrete, slag, and synthetic aggregate.
Aggregate is a granular material, such as sand, gravel, crushed stone,
crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a
hydraulic cementing medium to produce either concrete or mortar. Types of
aggregates include Coarse aggregate and fine aggregate. The aggregate of each
type is further sub-divided into many types and classification based on its size.
The technique of Sieve Analysis is used for gradation of aggregate for use in
concrete and for other applications.
Aggregate is called bound material when it is mixed with cement or binding
materials and referred to as unbound material when used without cement or
binding materials.
Aggregate Origin and Geology
Aggregates are commonly obtained by crushing naturally occurring rock. The
properties of aggregates depend on the parent rock which can be igneous,
sedimentary, or metamorphic. Aggregates are evaluated through tests to
determine their suitability for various applications. Mineralogy, grain size and
texture, and petrographic description of rock samples are also used to evaluate
suitability.
Types of Aggregates
Coarse Aggregate
