Extrusion Process

Gallery

	The Extrusion Process
	The Extrusion Team
	Extruded Asphalt Kerb – Our Service

Extrusion Process
Extrudakerb offer a complete design, installation and maintenance services of it's extruded asphalt kerb.

Team

Extrudakerb holds a number of UK and World patents for equipment operated by the group. This equipment is not offered for sale or operated by any other contractor.
Kerb extrusion machines have always been designed and manufactured in house.
Extensively trained teams are dispatched from Denaby to work on sites throughout the UK. Kerbing machines are towed on integral trailers behind medium box vans fitted out with all the specialised equipment required. The feeding machines are transported on dedicated lorries, travelling in convoy with the crews and kerbing machines.
The team supervisor arrives ahead of the crew and equipment. This allows adequate time for a full briefing with the principle contractor’s appointed site manager.
As a part of Extrudakerb’s commitment to quality and environment responsibility, the company operates within ISO9001 and 14001 systems certified by UKAS accredited company.
The safety of our workforce and those who might be affected by our operations is a paramount importance to the company. Bespoke risk assessments are undertaken for all activities and effective controls are employed throughout the business.

Preparation

Comprehensive methodology is provided, detailing required work space, mix design, together with safety and environment controls.

Preparation in advance of kerb extrusion is important but straightforward. The surface upon the kerb is laid must be clean, free from loose material and regular.
Setting out could not be simpler with only basic datum points being required at 30 metre intervals to indicate the required alignment of the kerb.
A sting line is laid out on the pavement surface immediately adjacent to the required kerb line.
A preparatory emulsion is then sprayed along the intended line of the kerb, again by equipment specially designed and manufactured in house. The emulsion acts to improve the adhesion achieved between the kerb and the surface upon which it is laid.
Within less than 30 minute of arrival on site the extrusion machine and feeding system are ready to start work.

Kerbing

The asphalt kerb material is compacted by a rotating auger and extruded at high pressure by the kerbing machine. It is the automated regulation of the extrusion pressure that ensures consistent production of uniform asphalt kerb section.
The high extrusion pressures achieved and automatically maintained ensure total compaction and fusion with the surface upon which the kerb is constructed.
The machine is steered manually with an operative simply following the preset guide line laid upon the pavement surface.
As with any hot rolled asphalt, hardening of the kerb material is dependent on the ambient temperature experienced immediately after laying. Although vulnerable to impact damage within the first hours of life, the kerb material hardens quickly and becomes extremely resilient to deformation within 12 hours.
The kerb always retains a degree of elasticity throughout its life. Unlike a rigid concrete section, it requires no form of contraction or expansion joint.

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