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The Aardelite technology is a process of agglomerating inorganic
fines like fly-ash from pulverized coal fired power stations.
Aardelite is proprietary technology owned by Danieli Corus but
licensed to us. This technology was developed many years ago when
fly-ash was a major problem in the Netherlands>during the last
15years the Aardelite have proven to be a P\perfect substitute for
natural gravel.
Turning a residue into a resource
Aardelite is a technology in which inorganic residues are turned
into a lightweight aggregate. Originally the Aardelite process was
developed to process fly-ash from coal fired power stations.
Research results have proven that the same technology can be applied
to other inorganic residues such as fly-ash from municipal waste
incinerators and industrial residues. The aggregate produced with
this technology can be used in building materials such as masonry
blocks and concrete products. In view of tougher environmental
legislation on the disposal of residues and the increasing public
resistance against the development of new quarries, the Aardelite
technology offers a perfect alternative.
The Aardelite process
The Aardelite technology is based on the puzzolanic properties of
the residue to be treated. By adding a binder, for example lime the
silica and alumina in the residue are transformed into cementitious
minerals. This transformation takes place at a temperature of 90
degree celsius. Because of this law temperature the process is
called a cold bonded type. The cementitious minerals form a matrix
in which potential toxic trace elements like heavy metals are
encapsulated. This immobiliztaion mechanism prevents these elements
from leaching into the environment.The
Aardelite plant
 Aardelite aggregates are processed in a continuous production
installation. An Aardelite plant consists of standard equipment like
mixer, pelletizer, silos and conveyors. Measures are taken to
prevent the nuisance of dust in the environment. The Aardelite
process itself doesn't generate any waste streams. Because Aardelite
is a cold process there is no fume or water-treatment equipment
required.
The
Aardelite product
Aardelite aggregate has a number of advantages
over natural gravel used in building products:
- because Aardelite is a lightweight aggregate
the products made from this material give considerable savings in
both handling and transportation costs;
- the spherical shape of Aardelite pellets
improves the workability of concrete mix considerably, thereby
reducing the efforts for compacting the mortar in the moulds;
- the required size of the aggregate for a
specific application can adjusted in the process.
The
Aardelite granulate applications
Aardelite pellets can be used as raw material in a
wide variety of applications for the building industry:
- masonry (building) blocks
- readymix concrete;
- prefabricated concrete elements;
- concrete piles;
- bitumen bonded asphalt for road construction;
- pavement stones.
The
Aardelite service package
In order to support potential clients we offer the
following services:
- testing suitability of the residue for the
Aardelite process;
- economical feasibility studies;
- support for the certification of the final
product according to locally applicable standards;
- basic and detailed design;
- delivering turnkey installations.
The optimum formula for the combination of residue, binder and
additives is designed and analyzed in a specialized laboratory.
Large samples can be processed into pellets for testing their
physical properties. The application of the aggregate in building
materials can also be tested.
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