AP Pavers is proud to offer a Super 1800-3i SprayJet to our ever-expanding fleet. Ideally suited to paving thin layers on spray seal, or for any kind of conventional paving on tack coat.
So why use a Spray Jet? It is a well-known fact that the UK falls behind the rest of Europe in terms of road quality - but the Spray Jet is set to change that. There are just a handful of the units in the UK (mainly the older generation), and we feel it is now time to make the newer generation units more available to this market.
The SprayJet allows the tarmac to be continuously laid onto hot emulsion, without the need for a tanker and avoids all the problems associated with wheel tracking. The technology has been proving its value for many years and is being used for rehabilitation and construction projects in many markets around the world.
AP Pavers will be able to provide two different services to the industry from small scale to large. The first is to supply the 1800-3i SprayJet with our specialist operator only - Possibly suiting the larger contractors.
The other option is providing not only the 1800-3i SprayJet and an operator, but also the emulsion bond coat and all associated technological needs whilst working the job - to sum it up this option provides the full package!
The SprayJet module is a system that sprays polymer-modified binder directly in front of the mix being laid, this avoids the well-known problem of the tyres on the tarmac delivery lorry constantly rolling over the just sprayed emulsion. It is then followed immediately by aggregate. It is the most economical and clean alternative to previous methods yet.
The largest issue associated with using a conventional paver and tarmac delivery lorry is that the wheels on the lorry rolling over the fresh emulsion removes the tack coat before the tarmac has even been laid, as it transfers onto the tyres. This wouldn't be such an issue, if it wasn't for the fact that where the tyres of the lorries are, is exactly where the tyres of cars will be driving on - leaving the worst part of the surface as the most used part of the surface. Tracking and pickup causes many problems; the consequences of poor bonding include slipping, shovage, increased rutting and also reduced fatigue life.
A key feature is that operation of the spray module has been integrated into the sophisticated ErgoPlus 3 operating system. The module has also been designed as a completely self-contained functional unit. It features a modular design that makes the system simpler to service and allows it to be used both as a spray paver and as a conventional asphalt paver. The paver has a maximum spray width of 6m.
With multiple spray bars the SprayJet can ensure that there will be full coverage of the existing surface with emulsion, even when the pave width varies. The rate of spread can be selected accurately from 0.3-1.6kg/m². The SprayJet pulses to achieve a uniform film of emulsion with no overlaps, and the function can be automatically adjusted to suit the speed, width etc. therefore providing increased accuracy and quality.
The module comes with an insulated emulsion tank with a capacity of 2,100litres and that can be increased to 7,100litres using an optional additional tank. The integrated electric heating (2 x 7kW) ensures that emulsion is maintained at the ideal temperature for spraying. And a heated emulsion pump circulates the emulsion in the tank, ensuring that it is homogenous.
AP Pavers believes that the best way to rehabilitate roads is by replacing the surface course using the VOGELE 1800-3i SprayJet, it is a cost-effective and eco-friendly process and is already very popular in numerous countries across the globe.
AP Pavers are extremely excited to announce that this new generation SprayJet will be the FIRST of its kind in the UK, and we look forward to following its progress across the country throughout 2017. We will be taking all enquiries and bookings immediately, so please, do not hesitate to call - we are sure this is going to prove a very popular new addition to UK surfacing market.
Roller Compacted Concrete
Roller Compacted Concrete (RCC) is a common alternative to asphalt and used extensively. RCC consists of uncrushed and/or crushed aggregate, hydraulic binders and sometimes concrete additives. It is mixed in a concrete mixing plant on or near the job site. The mix is transported by conventional feed vehicles and transferred to a paver, which places the material in layers up to 25cm thick. Finally, the concrete layer is compacted with rollers.
RCC is stiff enough to be compacted with vibratory rollers. However, the number of roller passes must be kept to a minimum in order to achieve the best possible stability, evenness and surface structure. This is guaranteed by the VOGELE High Compaction Screed in TP2 version. In addition to a tamper, the screed comes with 2 pressure bars operated by pulsed-flow hydraulics. VOGELE is the only manufacturer worldwide to offer this pulsed-flow hydraulics technology. A pulse generator inside the system generates high-frequency pressure pulses. These ensure that the pressure bars are in permanent contact with the mix, forcing the mix down until it cannot be compacted any more. This unique technology produces the highest compaction values that can be achieved by a road paver. Plus, roller passes are reduced to an absolute minimum. Often, just static roller passes are sufficient.
In order to achieve perfect results when laying RCC, a number of factors must be taken into consideration - referring to the properties of the concrete on the one hand, and to settings of the compacting systems inside the screed on the other.
The moisture content of the concrete is crucial for achieving maximum precompaction values. If the material contains too little water, optimal compaction of the concrete is not possible. If it contains too much water, the screed will risk sinking into the mix. Therefore, in order to determine the optimal moisture content, a test field should always be paved on the job site.
The pressue bars are located in the rear area of Vogele High Compaction Screed. In this location, the highest possible compacting intensity is achieved, as the mix is prevented from yielding to the front. Nor can it yield to the sides where it is confined by bevel irons.
At present AP Pavers are operating 3 Vogele 1800-3i TP2's and 1 Vogele 1800-2 TP1 high compaction screeds, all are equipped with everything needed to lay RCC and we find the Vogele does an exceptional job.
Please do not hesitiate to contact us with all enquiries for both the SprayJet and laying RCC.