Hollow Core Precast
 
 
 
PROGRAMS
ADVANTAGES
  • Building with pre-cast concrete elements opens up the opportunity to have a separate production because a part of the required products can be stored ahead of time no matter at what stage the construction is.
  • Pre-casting takes place in work sheds and therefore weather conditions are irrelevant.
  • Pre-cast concrete parts have a different rate of production than at the construction site. One could therefore stock supply and only deliver the amount required to the construction site.
  • This production technology is extremely precise when it comes to measuring. As a result, the usually prescribed width of the fixed concrete layer can be reduced. The steel reinforcement can be built exactly to requirement and therefore used optimally.
  • The finished construction is built with a high level of precision.
  • Due to a so called "all round calculation" the normally statically required reinforcement can be completely built and set into the concrete parts. As a consequence the time required to process reinforcement material at the construction site is reduced.
  • Transporting the pre-cast concrete parts to the construction site is easy. The measurements of most pre-cast concrete parts often do not require the use of a long vehicle.
  • This technology could replace building with skeleton frameworks. The advantage lies in having smooth wall and ceiling surfaces. Visible support structures are no longer required as they are incorporated within the concrete part.
  • Pre-cast concrete parts replace formwork at the construction site as they themselves form the layer into which in cast concrete is poured.
  • The surface of the pre-cast concrete elements is smooth due to being produced in pallets (steel formwork). Plastering is not required as very often the concrete surface is good enough for paint work.

 
Extruders
 
 

 

The extruder produces 15 cm - 50 cm high and 120 cm wide hollow core slabs.

The hollow core slabs impresses with a perfect wire bond, a smooth underside view without any pores and a high concrete strength of up to 900 kg/cm²

By exchanging the individual compaction units and using the same power unit hollow core slabs with different heights can be produced.

A decisive advantage of our extruder compared with other brands is the possibility, to adjust the speed of the augers during production according to their wear, so that a homogeneous compaction all over the profile cross section is guaranteed.

Features

  • Reliable Design with powerful Motor groups.
  • Flexibility with Exchangeable Compaction Units –only 30 minutes required.
  • Variable production speed between 1.5 and 2.4 m/min depending on the product height.
  • Adjustable augers speed ensures homogenous compaction of the entire cross section.
  • Lowest Wear and operation Costs by using wear resistant Materials.
  • Demand of cement minimized- using zero slump concrete with low water content.
  • Equipped with 1st. Quality Standards: SIEMENS, BOSCH, SKF, SEW
 
Concrete saws Top
   

The concrete saws are suited for cutting Precast concrete elements on the production beds.

Due to their robust construction, clear design and exact guides; maintenance and repair are reduced to their minimum. The saws are designed for diamond tipped saw blades, having a diameter from 600 to 1200 mm.

All types have mechanical stops for the stroke of the saw blade to avoid any damages to the production bed or rails. They have a single point suspension, so that they are lifted by the over-head crane without needing any additional lifting hoists.

Optionally the saws have two drums to keep the electric feed cable and the water hose automatically stressed and wound up.

We provide four types of saws according to our clients specifications.


1. The standard saw
The machine is positioned by the operator at the required cutting position. The Standard Type is equipped with manual operated hydraulic valves - thus the cut is performed by the operator of the machine. All speeds can be separately controlled with flow control valves.


2. Semi automatic Saw
The machine is positioned by the operator at the required cutting position. The Semi-Automatic Type is equipped with electro operated hydraulic valves, limit switches and a PLC controller - thus after starting the automatic program a complete cut is carried out automatically and the saw blade returns to its starting position. A "safety package" controls an automatic supply of coolant and the feed of the saw blade to avoid its overheating and bogging down

 

3. Universal Cutting Saw
The Universal Cutting Saw runs on the same rails [part of the casting bed] as those used for the molding machine unless the design is changed to suit other arrangements

The Universal Cutting Saw is composed of:

  • A gantry-type traveling main frame straddling the casting bed, with two driven wheels and two trailing wheels, with the operator’s stand mounted on one end, and the reels for both power cable and water hose on the other end, respectively;
  • A machine support beam [traverse], mounted into the main frame perpendicular to the direction of travel, and supported by four rack-and-pinion drives for moving up and down;
  • For angular cutting a rotating machine support console is provided, with indexing drive from plus 90° to minus 90°, and support bracket for the V-belt driven saw blade; the console is riding on the support beam by means of a reversible travel mechanism for traversing;

The saw motor with drive pulley, mounted onto the support console.


4. Fully Automatic Saw
Concrete cutting saw for the automatic cutting of pre stressed concrete units on the stressing bed: variable saw blade diameter of up to 1200mm, max cutting depth of 50 cm, equipped with among others:

  • modern central hydraulics integrating a valve block system
  • Reliable machinery including infinitely variable drives requiring low maintenance automatic feed control for saw blade.
  • Angular cuts is done by the machine.
 
Forming beds Top
 

Our casting beds are delivered completely with heating pipes and insulation.
Ridged build as 12m long ready to install units. The delivery is with or without pumps and valves ready to be connected to boiler and heat control system. The casting beds are to be welded to the fixing plates in the floor and to the pre stressing abutments at the end of the casting beds. The edges of the casting bed consist of profiled steel rails which are forming the edge of the hollow core slab. The rails also serve as rails for all machines that are used on the casting bed during the process of production.
Optional, we can offer special produced steel channels to be installed between the casting beds and on the outside of last and first casting bed. These steel channels provide an easy to clean surface.

  • High quality steel
  • 12 m complete ready to install units
  • Produced with narrow tolerances,
  • Special treated steel surfaces.

Technical Details :

   
Tolerance ± 1,5 mm over the distanceof 3.000mm
Width ±0-2 mm over the distance of 12.000,,
Dimensions L *W 12.000*1.288mm
Heating pipes 1,5” steel pipes
Insulation beneath the bed 30 mm
Steel surface 8 mm Special treated steel plate
   

The different types of beds that can be produced are shown below.

Hollow Case Steel Casting Bed
Post Tensioned Steel Casting Bed
 
Handling Equipment Top
 

The cut-to-size concrete elements are lifted by the main traveling overhead crane off the forming bed by means of special grabbing tongues and lifting beams and brought to the storage area. Alternatively, the elements are placed on carts and pulled to the storage area by a fork lift or tractor

 
As an alternative, we offer our own lifting device: It travels on the rails straddling the bed and features its own grabbing tongues. It is self-propelled by an engine [diesel, gasoline, or LPG]. The advantage of this device is that the main plant overhead crane is not tied up with lifting the finished concrete elements.
 
 
 
 
 
Auxiliary Equipment Top
 

Bed Cleaning Machine with multipurpose Application

The cleaning machine sucks up all the concrete debris and residual water from the saw and disposes both in an on-board container which can be lifted off for emptying. This machine can also be fitted with a pre-oiling system and with a wire pulling yoke.

FEATURES

  • Fully Hydraulically Operated Control.
  • Powerful Vacuum System for Dry Bed Cleaning in a One-Pass Operation.
  • Hydraulic Bottom Discharging Double Flap.
  • Easy and Quick Handling: Single Point Suspension and Variable Traveling Speed up to 60 m/min.
  • Reliable Design with Powerful Motor Rigid Frame.
  • Wire Pulling Device with 4 Wheel Friction Drive (Option).
  • Bed Oiling Device and Side Nozzle (Option).
 
Pre-stressing and detensioning systems Top
 
Stressing

Automatic Single Wire Stressing Jack:
The automatic universal- single-wire-stressing jack is designed for the pre stressing and post-tensioning of solid steel and strand-wire. It consists of a motor unit and a stressing jack. Different types of stressing jacks for the corresponding wire diameters can be connected to the motor unit. With a Special adapter, two stressing jacks can be connected at the same time.

We offer reliable quality and modern technology :

  • Safe and easy operation due to automatic working sequence.
  • Reliable due to maintenance free hydraulic in modern block construction in accordance with the CETOP-Norm.
  • High working safety due to automatic depressing of the anchor grips.
  • Easy handling for flexible use at construction or at the plant.
  • High precision due to low friction of the sealing elements.
  • The high pump and motor performance guarantee rational and fast work.

Detensioning Equipment:

After the concrete has achieved 80% of it’s specified final strength, then the stretching force can be transferred onto the elements. For this, the lifting jack and the motor driven pump unit is used to lift the stress bend, the support shells are removed, and thereafter strain is taken off the lifting jacks until the stretching force is totally transferred onto the concrete elements.

 
 
 
Consultation about plant design layout, selecting machines, and feasibility study Top
 

To all our Buisness partners, Technical service is done free of cost.

Deewan technical service includes :

  • Giving information to make feasibility study for the market calculating all costs and expected solution depending on the type of purchased plant.
  • Helping in selecting the proper land for the project with the suitable plant layout designing finished products handling and stocking.
  • Help in deciding proper slabs sizes for the projects and the required capacity.
  • Consultation and ideas on factory layout along with suggestions to optimize infrastructure design are done by our engineers. In addition to enhancing our designs for the plants to be expandable for future developments.
  • Installation of our equipment in such a way that it can give the maximum capacity with the lowest maintenance cost and suitable to the skill of staff working in the factories.
  • Full training of the staff dealing with our machines, along with extra visits after installation and commissioning to insure the maximum benefit of the machines.
  • Providing market tools such as broachers and catalogues with the clients name supporting him in selling his products.
 
 
 
 
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