24-12-2012, 04:42 PM
Materials
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Recycled and Secondary Aggregates (RSA) can be used in a range
of construction materials. The opportunities for their use are
provided in the following pages:
C oncrete
is a common construction material consisting of coarse and fine
aggregates mixed with cement and water. There are many
different types, classes, specifications and uses for concrete. The
opportunities for use of RSA in concrete applications are detailed
within this section.
Bituminous
materials are principally composed of coarse aggregate and fine
aggregate filler; aggregates typically contribute 90-95% of the
mass of bituminous material.The opportunities for use of RSA in
bituminous applications are discussed within this section.
Hydraulically Bound
materials (HBM) are simply materials which set and harden with
the addition a binder material and water. HBM have potential to
be used in a range of paving and non-paving applications, these
opportunities are discussed within this section.
Unbound materials
collectively comprise a vast array of different materials, which
may range in size from fine grains less than a millimetre in
diameter up to stony material several centimetres in diameter.
The opportunities for use of RSA in unbound material applications
are discussed within this section.