Downer NZ’s cold mix asphalt solved an infrastructure conundrum, enabling the small nation of Kiribati to reopen its international airport three years after it closed due to the poor state of the runway.
The Pacific nation of Kiribati desperately needed its Kiritimati Island airport to reopen but it couldn’t afford a $5 million asphalt plant, or the large supplies of bitumen and energy required to patch the runway with traditional hot mix asphalt.
Cassidy International Airport closed in 2008 amid safety concerns about its crumbling 50-year-old runway.
To overcome the need for a hot mix asphalt batching plant, Downer NZ researched and developed a cold mix asphalt solution.
It could be stored in shipping containers, was stable for three months in tropical heat, and had sufficient strength to withstand heavy traffic loadings within 10 days.
The closure of the airport on Kiritimati Island had imposed social and economic restrictions on critical island activities, such as food supply from Fiji and Hawaii, travel to the capital Tarawa, and tourism and sport fishing activity (which provides more than 20 per cent of Kiribati’s GDP).
Downer NZ Chief Executive Cos Bruyn says: “The development of the cold mix technology was the only affordable remedy to get Kiritimati Island reconnected with the world.”
Downer NZ provides design, build and operate services across five sectors – transportation, water, telecommunications, facility management and energy.
The company anticipates signifcant demand from Pacific countries for cold mix technology as a cost effective and appropriate engineering solution for maintaining aged asphalt paving.
Mr Bruyn says: “The temporary repairs at Cassidy International Airport were very successful, providing a value-for-money solution and allowing this critical infrastructure to reopen to jets.”
After patching the runway with cold mix asphalt to get the airport reopened, Downer NZ was awarded the contract to permanently fix the runway.
In the last year, Downer NZ reported revenue of $1.2 billion, of which almost $53 million was from offshore earnings. The company’s international earnings were just over $10 million in 2008.