Photo by Mark Price.
New taxiways are being constructed at Wanaka Airport from
a material not previously used at a New Zealand airport.
Instead of concrete or bitumen, the taxiways are being made
from a mixture of local clay, crushed rock and lime bound
together by a vegetable enzyme originating from Malaysia.
The process requires the material to be crushed and mixed by
a heavy-duty rotary hoe before it is rolled and then shaped,
using a grader.
A spokesman for the company doing the work, SBL Firmament, of
Christchurch, said most of the work the company did was
creating cow lanes on dairy farms, and the lanes had a life
expectancy of about 15 years.
Airport manager Ralph Fegan said the new taxiways replaced
grass that became muddy and potholed in winter. The new
taxiway areas cost about $50,000.