What takes 2746 cubic metres of concrete, 16 hours, and a continuous fleet of 60 trucks to complete?
The folk at NZ Refining, which runs the Marsden Pt Oil Refinery, have the answer - the base for the refinery's $365 million Continuous Catalyst Regeneration Platformer project.
The $365-million CCR project will lift the refinery's capabilities to 80 per cent of all New Zealand's fuel needs, providing a more reliable fuel source. Building work will also create about 300 on-site jobs and hundreds more off-site over the next four years.
On Saturday a convoy of 60 concrete trucks took 550 separate loads over 16 hours to pour 2746cu m of concrete into a hole 1.5 to 2 metres deep for the base.
The pour - believed to be one of the largest single-day concrete pours in New Zealand - started at 3.30am on Saturday and continued through to 9pm, Refining NZ communications and external affairs manager Greg McNeill said.
"There was 2746cu m of concrete poured to a depth of between 1.5 and 2 metres. Around 550 separate concrete truck deliveries were required from five batch plants in Whangarei and Ruakaka - using a fleet of 60 trucks," Mr McNeill said. "At any one time there were 15-20 trucks on the refinery site, with a truck delivery to the concrete pour about every 90 seconds."
He said, having completed the pour, the concrete base for the refinery's new CCR unit will be carefully monitored over the next four weeks until the concrete is fully cured.
The pour was directed by United Civil with assistance from Allied, Firth, Atlas, Golden Bay Cement, Winstones; Marsden Industrial Solutions (formerly MPCL), Stan Semenoff Sand Supplies, Opus Engineering and Sika (concrete admixtures). Special assistance was provided by police and NZTA.