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Diamond drilling


Diamond drilling is now in big demand throughout the construction industry, from drilling holes for services such as cables, pipes and air conditioning to test coring for site investigation.All diamond drilling is virtually vibration and dust free, causing minimum disturbance to the surrounding environment.

Diamond drilling can be carried out either wet or dry depending on specific site requirements.Both of these techniques provide precise holes through all types of hard material.The drill diameters we have in stock range from 8mm to 1200mm in diameter and from 150mm to 3.5m in length.

We also offer an unlimited drilling depth by using standard drill lengths of 450mm to start with then use longer barrels and extension bars until the required depth has been met.


Stitch drilling

Where access is restricted for our larger plant e.g. floor saw or track saw, by drilling a series of over lapping cores, known as stitch drilling we can form openings any size, shape and depth. This is an effective solution for cable trays, pipe runs, lift shafts, escalator openings, door ways and windows, the list goes on.

Hamd held drilling


Hand held drilling is an idea solution when holes for vents and flue holes are required, with a drilling depth of up to 2m depending on the material to be cored the compact size of the machine solves the problems of restricted access when our larger drilling equipment is unsuitable for the task.


Test coring

Test coring is normally used in connection with rail and vehicular tunnels, roads, newly poured concrete slabs and in some cases where site investigation work is being carried out.

The core which is removed from the material is taken from site in its own specific core box, labelled and numbered in accordance with where they were taken from, taken to an independent materials testing company who we work closely with. After being put through a series of tests a report of the results is then forwarded on to the client.

Diesle Floor Sawing


Our diesel floor saws are the biggest floor saws on the market capable of accommodating a 1500mm diameter blade.

Cutting to a depth of 635mm with 72 horse power being delivered to the shaft by an 84 horse power engine cutting reinforced concrete has never been easier.

The large floor saws we have are ideal for the removal of large unwanted concrete slabs. When tracks are required e.g. in roads or concrete floor slabs for installation of services the self propelled diesel saw is ideal.

Electric floor sawing


As shown below, electric floor sawing is mostly carried out inside e.g. warehouses, shop floors, and other areas where diesel machines can not be used due to noise levels and fumes. The electric floor saw is operated by a 3 phase 415v supply which C.D.C can also supply. By running cable to a 3 phase generator situated outside keeps noise levels and fumes away from the immediate working area.

Concrete bursting


With health and safety regulations concerning Hand Arm Vibration Syndrome ( H.A.V.S ), men working with breakers for lengthy periods of time are a thing of the past. This is where hydraulic bursting comes into its own.By drilling random 112mm diameter holes in a section of concrete, we insert the burster head, which consists of 3 hydraulic pistons being pushed out by 100 - 1500 bar of pressure, cracking and breaking the material with no noise, dust or vibration, the 3 worst hazards in the construction industry .This method is ideal for breaking up plinths, mass concrete bases, heavily reinforced concrete beams and columns or even unwanted lumps of rock.Although being vibration, dust and noise free the initial drilling of the 112mm diameter holes has minimal noise and a creation of slurry which is controlled by means of a wet vac.Used alongside diamond drilling hydraulic bursting IS the answer.

Concrete crunching


Hydraulic crunching is another effective way of reducing concrete to rubble.This method can either be carried out by machine or if access is restricted by hand. This is also powered by 3 phase, 415v volt eliminating any fumes that emit from diesel machines.Normally used for the reduction of concrete beams, floor slabs and walls the hand cruncher with two operators is a very fast and efficient way of removing concrete with zero disturbance to surrounding areas.

If there is ample access for our remote control demolition machines we then send the machine into the area while the operator stands 15m or so away keeping him out of any immediate danger.

More about our remote controlled machines is illustrated on ROBOTIC DEMOLITION .

Robotic Demolition


Robotic demolition is exactly what it is, a remote controlled track machine built purposely for safe demolition. The machines C.D.C have on board come in two sizes, we have the BROKK 90 model and the BROKK 180 model.

The BROKK 90 is the smallest one we have capable of going through doorways and window openings, weighing just over 900kg it is also light enough to be driven into most goods hoists. However where there are no hoists or lifts for access the BROKK 90 is more than capable of climbing staircases to get to its required destination. The BROKK 180 is roughly double the size and weight and has double the power normally involved in taking down single story buildings. It can also climb staircases but given the dimensions of this particular machine we normally leave that to the BROKK 90.Being remote controlled the machines can be sent into anywhere up to 30m away as long as the operator can see what it is doing.The best thing about these machines is that 1. it is remote controlled, keeping the operator out of any immediate danger of falling debris. 2. it is powered by 3 phase eliminating any fumes. 3. has the same power as any other track machine of its size.Also an operator can work all day breaking out concrete or rock without the risk of developing Hand Arm Vibration Syndrome.Basically a Health and safety friendly machine.

anchor and barrier installation


We also offer mechanical and resin anchor installation service. As you can see from the examples shown, the anchors we install are used for many reasons from light weight pedestrian barriers (which we also supply and fit) to tying down points for ships and ferries.Rotary percussive (hammer) drilling is the best form of hole that can be drilled out for use of the resin anchor, the way that the percussive drill leaves the hole is very rough around the perimeter, giving an excellent keying surface for the resin to bond to. However if for example we were drilling into a reinforced concrete slab and drilled down so far then started to hit steel mesh situated within the concrete we would then use our diamond drilling techniques to core through and remove the obstruction before continuing with the percussive drilling.

In some cases when larger diameter anchors are required we core the complete hole using diamond drilling then reaming out the hole is necessary to roughen the sides for the resin to key to.

C.D.C have been involved in many barrier installation contracts all over the U.K. We use an independent materials testing company who on request offer an excellent pull testing service to ensure that all anchors are secure.