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Concrete In Australia : March 2014
Concrete in Australia Vol 40 No 1 15 AUSTRALASIAN C ONCRETE S ERVICES WATER IN THE BASEMENT? ACS LEAKSEAL ACS ALSO SUPPLIES BeA NAIL GUNS AND FASTENING SYSTEMS AND A WIDE RANGE OF ADHESIVES AND TAPES. JERA COOKE 0420 554 699 firstname.lastname@example.org www.acsco .com.au WATERSTOP — T HE VE RY BEST AVAILABLE (GLOBALLY) — ENGINEERS WHO CARE SPECIFY ADEKA WHERE THEY NEED THE WATERSTOP TO ACTUALLY DO THE JOB INTENDED, AND FOR THE FUTURE LIFE OF THE STRUCTURE. — ADEKA PROVIDES A RANGE OF HIGH QUALITY WATERSTOPS. For further information please contact FOR A STRUCTURAL REPAIR TO CRACKS IN CONCRETE SPECIFY SHO-BOND BICS MADE IN JAPAN Concrete 2015 Concrete 2015, the 27th Biennial National Conference of the Concrete Institute of Australia, will be held next year in conjunction with the 69th RILEM Week conference. This historic joint event will provide national delegates with valuable exposure to cutting edge research and development exchanges in the international forum of RILEM Week and will be held at the Pullman Albert Park in Melbourne, from 30 August to 2 September, 2015. Concrete 2015 will focus on the theme ‘Research into Practice’. The conference is dedicated to bringing together global leaders in the concrete industry, covering all aspects of concrete design improvements, research, construction, maintenance and repair of concrete projects. Concrete 2015 will offer participants from around the world the opportunity to connect face to face and share innovative and interesting ideas on valuable research outcomes and latest construction practices. Papers are invited that are based on experimental work, research and development, practice or industry application, case studies, innovations and other relevant work of interest. The multidisciplinary theme of Concrete 2015 will provide an excellent forum for networking and education and an opportunity to meet and interact with practitioners, engineers, scientists, researchers, academics, and professionals, and also to engage with international delegates from RILEM technical committees. We hope you can join us in Melbourne in August next year. Save the date! Professor Jay Sanjayan, Conference Chair – Concrete 2015 Dr Kwesi Sagoe-Crentsil, Technical Committee Chair underpass 629 piles were installed using a combination of Continuous Flight Auger (CFA) piling inside Perth Station, and secant piling in Wellington Street forecourt,” he said. “Mini piling rigs were used to bore 300mm diameter piles up to 45 metres deep down to the Kings Park rock formation. CFA piling was the most efficient method to use and its major benefit was the minimum level of noise and vibration, which ensured the integrity of nearby structures and buildings was maintained.” Holcim Australia supplied a variety of special purpose concrete mixes that were engineered and tested to minimise concrete expansion, and to ensure the required 120 year design life would be achieved. “Within the piled walls, 50MPa concrete was used and 40MPa structural concrete mix in other areas. In some sections the waterproofing additive caltite was mixed, supplied by Cementaid, where other means of waterproofing was not possible and to ensure the roof of the underpass remained water tight. Low heat concrete was also used for certain walls to prevent shrinkage during the base slab curing process,” McCarthy said. Some of the project challenges involved temporarily closing three traffic lanes on Wellington Street to build the connection from Perth Station to Perth Underground, and suspending the station building before excavating underneath. Post-tensioned concrete underpinning beams supported by the piles were used to ‘clamp’ the existing Perth station building foundations to carry out the station underpinning. The technique was a success with zero settlement recorded. To ‘breakthrough’ into Perth Underground and link the two stations, a staged process was carried out to wire- saw through the existing 1.2metre thick diaphragm walls. Features of the new underpass include architectural skylights at platform level inside Perth Station which provide natural light and air below ground. In addition, new lifts, stairs and escalators improve passenger flow and provide better access between the two stations. Each day more than 9300 passengers transfer between Perth Station and Perth Underground. By 2031, this will increase to an estimated 22,600 people per day. The completed pedestrian underpass, December 2013. 14-15 - News.indd 15 14-15 - News.indd 15 3/02/14 11:44 AM 3/02/14 11:44 AM