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Products
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Whether
the producer is in the cooler climates of Northern Europe
or North America - or in the more temperate climates of Southern
Europe or the Middle East - Envirocure offers the producers
the advantages no other system can. By keeping the environment
within the kiln, non-condensing conditions can be maintained
and climatic conditions, heat of hydration and product throughput
can be taken into account to maintain optimum curing conditions.
The advantages of the Envirocure system are numerous - from
the possibility of cement reduction through to secondary processing
online. It has the flexibility to enable the producer to maximise
the system and create the conditions required for their production
facility. |
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are five essential controlling factors for good curing
of concrete products: |
 Accurate
Temperature Control |
Recirculation
and Energy Saving |
| Accurate
Humidity Control |
Good
Insulation |
| Time
in the Curing Environment |
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The
CDS Envirocure system offers all the above plus much, much
more for any producer of pre-cast concrete.
Once any concrete product is formed, it is essential that
it is placed into a protective environment to initiate the
curing process. An environment which assists curing by increasing
the speed of the curing process produces a stronger end product.
This protective environment is Envirocure. With controlled
temperature and humidity conditions, the system will maintain
the required conditions 24 hours per day, 365 days per year
if so desired. |
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The Envirocure
II system is specifically designed to give the flexibility
of having different controlled parameters in each kiln / lane.
This enables different product groups to be cured at differing
control parameters.
So, if desired, the customer can produce retaining wall,
block and paving on the same shift and cure them at different
temperatures and humidity levels, however maintaining the
desired air circulation for constant conditions and the high
level of energy efficiencies expected of all CDS Systems.
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| Rad
Therm |
Rad
Therm Piping |
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| Rad
Therm Piping |
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Rad
Therm |
For some
manufacturers of particularly delicate products CDS
has now enhanced its Envirocure system with its Radtherm
system.
This system has a very low air circulation speed but
having all the advantages of the Envirocure system.
The system was mainly developed to use with the roof
tile industry, but can be utilised in other areas.
The basic system utlises either a low or medium pressure
hot water system to generate the heat energy within
the curing room. This, with gentle air circulation and
exact humidity control can provide some producers with
an opportunity of achieving a greater product quality
which was not possible before.
The design has been developed with energy saving also
in mind. With a fully recirculatory LPHW/MPHM system,
any energy that is generated remains in the system.
In a multiple chamber system this can be extremely energy
efficient.
The Radtherm system, as with Envirocure, can be designed
to operate on a variety of products and can easily be
retro-fitted if so desired. |
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| Space
Heating |
| With
CDS' wealth of experience in both the Concrete and
Ceramics Industry we can provide a cost effective
economical space heating system that can assist
in all areas of concrete product manufacturing where
the product is left in situ whilst being manufactured.
This will aid both in the quality of the product,
the efficiency of manufacture and the ability to
reduce the work in progress. |
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Space Heating Systems have been used in producing
a range of products such as:- |
| Pipe |
Wet
Cast Products |
| Sanitary
Pieces |
Veneer
Stone |
| Paving |
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As CDS
developed its curing systems it became apparent that
there was a demand in some areas for the raw material
entering a manufacturing facility also to be kept as
a constant.
Thus, CDS has now developed its own Aggregate Heating
System that can provide manufacturers an extremely cost
effective solution to bringing cold aggregates and sands
into the plant at a constant temperature and enable
the producer to operate the plant for a longer period
through the year as well as taking another variable
out of the manufacturing process.
The MaxThaw system uses well proven technology used
by CDS for many years. The aggregates/sands can be loaded
into the storage bins/silos and over a short period
of time can be heated to the desired temperature. The
aggregate/sand is heated by using a very flexible system
where warm air is blown into the bins in specific areas
and the temperatures controlled accurately. The system
design blends into the CDS philosophy of taking away
a variable, while being energy efficient, user friendly
and consistent.
CDS can provide a system that can be installed on a
new plant or retro-fitted onto an existing plant. |
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| Racking |
A
high manufacturing capacity is the rule in the concrete and
assembly unit industry. Fully automatic production lines,
often working in several shifts, produce thousands of square
metres of concrete stone daily. Curb stones, hollow stones
and elements for market gardening are other production examples.
The curing chambers made by HS Anlagentechnik
are the logistical link between the wet and dry sides of these
production lines. The newly manufactured elements have to
be put in storage, the hardened elements have to be taken
out of storage, then packed ready for dispatch. The required
storage capacity has to be available - stabile, strong, exactly
fitting.
HS Anlagentechnik is a young innovative
team which has inherited 30 years' experience in shelf construction.
But that's not all. Their understanding of the product and
the whole trade as well as a perfectly thought-out rack system
complete the range.
Our Distinct Profile
One profile is not the same as another. The basic material
used for the curing chambers made by HS Anlagentechnik is
specially galvanised strip steel manufactured according to
DIN EN ISO 9002 (of EU derivation) for all supporting parts.
Top quality offering corrosion protection of at least 70u
pure galvanising. The steel strip for the bearer profiles
is cold-formed in a rolling automat, where it gets the contour
needed in the finished rack for the Snap-In connection with
all its constructive advantages.
The Snap-In Connection
Fast, safe, unmovable - just fit and screw. Simply slot in,
press down - and the lasting connection of the support and
bearer profiles is set up. The steel components are locked
together precisely and exact to the millimetre. The ideal
Snap-In connection offers many advantages. The simple assembly
saves time. The extreme stiffness of the curing chambers allows
maximum static loading and highest loading capacity. Technique
that means cost-saving and safe production - technique for
professionals.
Capacity and Planning Made to Measure
HS Anlagentechnik supplies curing chambers as a unit system
where 2-5 chamber aisles are combined together to form a frame.
For instance, 10 chamber aisles can consist of 2 five chamber
combinations or 2 four chamber combinations and a 2 chamber
combination. The number of storage spaces required can be
planned individually and easily expanded. Each of these constructed
units forms an individual, absolutely rigid element which
has its own static stability. The big advantage: curing chambers
made by HS Anlagentechnik are self-supporting and stand on
their own. The don't need support from the sides or above.
More safety for heavily loaded storage systems in permanent
use.
The Unit System together with the Snap-In
connection means the system can easily be self-assembled,
and results in cost saving. A great assistance for this are
our detailed assembly instructions. |
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| Pipe
Curing |
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Of
course, there are the manufacturers who demand little
or no air movement, so therefore we are able to design
the system using our wealth of knowledge which would
provide the system and environment specified by the
customer.
A CDS Envirocure Curing System allows
the plant to run in a closed loop.
Curing starts immediately after a
chamber is filled with product, and depalletising of
the cured products starts as soon as the curing cycle
is completed for that product run. |
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The
system is pre-programmed to ensure that chambers are opened
at the exact time when the product is cured to the required
specification.
CDS curing chambers are designed to account
for heat transfer to the concrete pipe and the required humidity.
Heat and moisture balance over the curing time is precise. |
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| Dry
Cast Curing |
The
curing process is particularly important with dry-cast mixes.
Adequate curing enhances the desirable properties of concrete,
such as strength, impermeability, surface hardness, and crack
resistance. Early curing periods are most critical to ensure
protection from extreme temperatures and dryness. Dry cast
products must be protected from drafts to prevent cracking
due to surface moisture.
Concrete can not cure properly without an
adequate amount of water in the mix. And, because the forms
are removed immediately, dry cast products have an undesirable
tendency to dry too quickly. Consequently, a dedicated curing
area, such as an insulated enclosure with misters, is generally
required.
A normal curing cycle for dry cast products
includes a preset period of about two hours, a ramp period
(to raise ambient temperature to the desired curing temperature)
of four to six hours. These curing cycles will vary with the
type of product being cured.
Curing in a controlled, moist environment
dramatically increases the concrete's rate of strength development.
In many cases, full design strengths can be achieved in one
day.
Note: Curing begins after the exposed surfaces
of the concrete have hardened sufficiently to resist marring.
Curing ensures the continued hydration of the cement and the
strength gain of the concrete. Concrete surfaces are cured
by water. The longer the concrete is kept moist, the stronger
and more durable it will become. The rate of hardening depends
upon the composition and fineness of the cement, the mix proportions,
and the moisture and temperature conditions. Most of the hydration
and strength gain take place within the first month of concrete's
life cycle, but hydration continues at a slower rate for many
years. Concrete continues to get stronger as it gets older.
Hydration Begins
Soon after the aggregates, water, and the cement are combined,
the mixture starts to harden. All portland cements are hydraulic
cements that set and harden through a chemical reaction with
water. During this reaction, called hydration, a node forms
on the surface of each cement particle. The node grows and
expands until it links up with nodes from other cement particles
or adheres to adjacent aggregates. |
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| © Copyright 2009 CDS Group |
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