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America's Cup Waterfront 2000 Development at Aukland Harbor, New Zealand01-01-01 | 16
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Surebond SB-1370 Joint Stabilizing Sealer was specified to seal and stabilize the prestigious Aukland, New Zealand Waterfront 2000 boardwalk that provides the backdrop to the staging of this year's America's Cup international yachting challenge.

While the Surebond SB-1300 sealer, imported especially from America for the project, has performed very impressively under those harsh conditions, the same cannot be said for the American yachts that were sadly eliminated from the Louis Fuitton competition. This year will be the first time in 150 years than an American team will not be competing in the final event to defend the trophy that bears its name.

The Aukland City Council, together with private developers, decided to rebuild the boardwalk around this picturesque bay to upgrade the popular tourist section of the City. The architects, City Design Ltd., working with the international firm of consulting civil engineers, Ove Arup and Partners, elected to use patterned brick pavers manufactured in Australia as the primary surfacing material with cobble stone features in some of the high profile restaurant areas.

Surebond's SB-1300 Joint Sand Stabilizer/ Sealer forms a joint sand matrix that preserves the structural interlock of the pavement.

The decision to beautify the waterfront was taken after numerous studies that were made of similar boardwalks not only in Australia but as far afield as Europe and South Africa. Feedback obtained from developers in those countries established the cost saving benefits that were easily confirmed by doing lifecycle studies.

What they learned was that tremendous socio-economic benefits had accrued to those developers in particular, and to the cities as a whole. By introducing the decorative paving they created a whole new environment. These pavements not only provided attractive settings but also changed the demographic mix of visitors. A new class of tourists started visiting the waterfront areas that had previously been the haunt of a somewhat undesirable element. In response, property owners fronting these developments began to upgrade their facilities in order to cater to the new visitors. One such development in Cape Town, South Africa changed a deserted, dangerous old fishing harbor into the second most visited tourist venue in Africa. It all started with some decorative paving and became a win-win return for everyone involved.

The Aukland developers chose pavers in four different contrasting colors, to be installed in a variety of patterns on a sand bed over an aggregate base and joined in sand. This method of setting was chosen because the City wanted a pavement that would be built for posterity in this historic harbor. They also specified that it should perform with the absolute minimum maintenance cost.

The pavers, chosen for their dramatic colors, did not have the normal spacer lugs to ensure the exact spacing between the units for the jointing sand. The installers, however, planned for this contingency by installing the pavers on the uncompacted bedding sand in the normal way, leaving 1/16-inch spaces between the pavers. They then brushed in a small amount of joint sand to fill the bottom third of the joints before carrying out the initial plate compaction of the pavement. This ensured that the pavers retained their exact alignment. Once they were certain that they had established the correct lines, spaces, and patterns, the joints were filled with joint sand to the bottom of the chamfers. They carried out a final pass of the plate compactor to solidly bed the pavers and create the final interlock.

The Surebond SB-1300 was then applied to the pavement by pumping the material directly out of the drums using a low-pressure bulk sprayer. The excess material was squeegeed into the joints to bond up the sand and allowed to cure for 24 hours. The end result has been an unqualified success. The pavement has been subjected to very heavy construction traffic and wetter than normal climate conditions in New Zealand. Not a single damaged or chipped element was observed in the entire pavement during a walk-through that was done some six months after the contract was completed. The performance life for the pavement has been estimated at 100 years. A great testimonial for a well-designed and constructed pavement.

The SB-1300 penetrating Sealer provides surface protection from salt spray, acid rain, as well as other oxidizers while inhibiting plant growth between paving units
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