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Concrete In Australia : September 2014
NEWS 10 Concrete in Australia Vol 40 No 3 Concrete breakthroughs Perth based Eden Energy has its sights set on conquering the USA’s maintenance roads and bridges market after received promising results on its mortar that shows marked increases in strength. Initial tests conducted in the United States of carbon nanotube (CNT) enriched mortar paste have resulted in an increase of 23.3% in compressive strength and a 13.6% increase in flexural strength after 28 days, according to the company. The carbon nanotubes were produced using a proprietary pyrolysis process developed in conjunction with The University of Queensland by converting methane into carbon nanotubes and hydrogen, without directly producing CO2 as a by-product. Consequently Eden Energy has been selected as a finalist for the Built Environment Award in the Australian Technologies Competition 2014. Eden anticipates stronger and lighter structures can be built using the strengthened concrete which is also expected to produce significantly tougher high wear surfaces such as roads, bridges, car parks and warehouses. “Field trials are planned to start in the next couple of months in the USA of our CNT enriched concrete, initially targeting abrasion resistant applications like surfaces of roads and bridges that are exposed each winter to heavy abrasion resulting from clearing snow with snowploughs,” executive chairman Gregory H Solomon said. He said the company is aiming to have a commercial product within 1-2 years, initially targeting the USA’s annual US$40 billion bill for maintenance on its 89,000km of concrete roads and bridges before extending into high rise construction applications. Game-changer Boral Cement has been working on a lower carbon concrete product, Envisia, which has won the company a NSW Environment Innovation award from Cement Concrete & Aggregates Australia in recognition of its commitment to innovation and sustainability. The product was launched into the NSW market in 2013 and is made with ZEP technology developed by Boral as part of a process that uses less cement in the concrete manufacturing process while not impacting on performance. The company says Envisia behaves like conventional concrete and can be placed using standard OH&S and placement methods without any compromise on early strength and cycle times. Executive general manager for Boral Cement Ross Harper labelled the product a “true game-changer” and “the Lift shaft corner reinforcement with Dincel’s construction system. PHOTO: DCS CIA 40-3 FINAL.indb 10 CIA 40-3 FINAL.indb 10 26/08/14 9:18 AM 26/08/14 9:18 AM