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Nynas Endura Z2 is a highly modified Premium hot mix binder. The product has excellent workability characteristics and has been specially developed to deliver the optimum balance between toughness and flexibility. Nynas Endura Z2 is suitable for the most onerous asphalt paving applications.
In summer 2010, quays 34 and 35 in the eastern section of the Port of Southampton were given a new asphalt surface. The two quays cover an area of around 40 acres, where Wallenius Wilhelmsen, one of the world’s leading operators of ro-ro vessels, has its operations. The contractor Aggregate Industries opted for an asphalt solution that was different from the one originally envisaged by the port’s owners. But after showing that this solution had been used with great success in the Port of Hamburg, and that the cost and time required were reduced by 8% and 18% respectively, they were given the green light to proceed. The surface included a 60 mm binder course and a 40 mm surfacing course using Nynas Endura Z2 as binder.
The evaluation revealed that the surface had performed as well as promised, with no rutting or other degradation. The instances of damage that were noted from the so-called MAFI trailers did not affect the integrity of the material. This outcome means that Associated British Ports (ABP) is also planning to use the same solution in other parts of the port. The good durability is especially important bearing in mind the loss of income if the port cannot be fully utilised because of maintenance measures.
There are many benefits associated with laying asphalt on quaysides and other heavily used areas in ports. Asphalt can be laid without splices, which makes life easier for the special vehicles used for loading and unloading. Asphalt is also resistant to a number of substances and chemicals. This property explains why asphalt is also used on runways at airports.
At the same time, it is important to be aware that the requirements differ in one crucial way from a conventional road surface. In a port, the surface is subjected to high static loads, primarily from containers. The load is further increased by forklift trucks and other special vehicles that travel at very low speeds on relatively small wheels.
Nynas Endura Z2 is a polymer-modified premium binder that has been specially developed to cope with these kinds of extreme stresses, with its combination of deformation resistance, flexibility and good temperature properties.
SITE NAME Port of Southampton
ASSIGNMENT Asphalt surface on quaysides where containers are loaded and unloaded
CLIENT NAME Associated British Ports
ASPHALT PRODUCER Aggregate Industries Ltd
DATE August 2010