It’s in the bag with Drymix plant - DEMM

Concern that New Zealand is 25 years behind Europe in the availability of drymix cement-based products, led Kiwi businessman Geoffrey Clark to invest heavily in a new plant incorporating the latest European equipment to provide the local market with a wide range of precisely formulated drymix products.

Clark’s company Cemix Drimix is building a fully automated plant in Onehunga which will have the capacity to produce 15 to 20 tonnes of finished bagged products per hour or 48,000 tonnes per year on one shift.

The plant handles dry powder material without using screw conveyors or air slides – instead it incorporates patented fluidization technology from Finland. This makes powders (sand and cement) flow like liquid, enabling the use of double flap butterfly valves for accurate and high-speed dosing.

The entire plant is computer-controlled for accuracy and consistency of finished products (it produces products with up to 17 ingredients), and requires just four people to operate it.

Project manager Bhav Dhillon says that until now there has been very little control over what happens on a building site. “Concrete blocks are made to fairly rigid specifications, yet builders mix concrete and mortar dumped on site with shovels.”

He says future legislation will tighten up on these unsafe procedures and Cemix’s new plant will provide consistency and low cost products, as well as enhanced product performance.

The plant will initially supply dry concrete, quick-setting concrete, mortar mix, and mason mix.

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