_AT01_pages_24-33 2/21/08 3:36 PM Page 33
require intensive quarrying and with almost 280 weighing around 50 per cent of natural
million tonnes of aggregate used by the aggregate. By taking this saving into account,
construction industry each year, there is great when (PFA) is used in concrete a 25 per cent
potential to not only reduce demand for primary reduction can be made in its weight and
materials, but also make use of materials that therefore, architects are able to design greater
would otherwise go to landfill. spans maximising floor space for users whilst
“It’s not only about using recycled aggregate, using less supporting columns as floors will be
we’ve found that secondary materials, such as that much lighter. The entire structure will be
sintered pulverised fuel ash (PFA) are proven lighter than one using traditional concrete, so
alternatives to natural aggregate for use in reduced foundations can carry the building,
structural and precast concrete. This is not a resulting in cost savings for the client.
One easy place for Architects to start is in the
selection of aggregates
new concept - some of the UK’s biggest When developing within an existing
landmarks have already embraced secondary structure, using normal weight concrete can
aggregates – take Swiss Re, Heathrow Terminal cause contractors issues by requiring
5 and Wimbledon Centre Court as just a couple strengthening work to be undertaken to the
of examples,” adds Gareth Moores. structure to enable it to carry any extension.
Secondary aggregate diverts substantial By specifying a lightweight aggregate concrete,
tonnages of waste from landfill every year. architects can reduce this additional work, and
Sintered pulverised fuel ash aggregate, for still achieve a structure that is compliant with
example, provides a new use for thousands of the original design.
tonnes of ash – a by-product of coal burning It is clear that sustainability is going to
power stations. Most certainly without the continue to push its way to the top of the
construction market most of this would end construction agenda, and architects, designers
up in our depleted landfill resources. and specifiers all need to embrace it to meet
However, it can be manufactured into a high increasing client demands. There are the
quality aggregate that offers designers a materials available that will enable architectural
sustainable option alongside some excellent technologists to achieve innovative designs that
performance characteristics. have sustainability at their core.
Pulverised fuel ash is a lightweight aggregate,
171
CLASSIFIED & DIRECTORY CLASSIFIED & DIRECTORY CLASSIFIED & DIRECTORY
ARCHITECTURAL METALWORK
Hillaldam Coburn Ltd
www.coburn.co.uk
Unit 6, Wyvern Estate, Beverley Way
New Malden, Surrey KT3 4PH
Tel: 020 8336 1515 Fax: 020 8336 1414
A market leader in the manufacture and
supply of sliding door gear. Ranges to
suit from wardrobe doors to hanger
doors, straight sliding and
sliding/ folding.
Enquiry No. 501
For details of advertising
DISABLED LIFTS
on these pages
The Wheelchair Lift Co Ltd
www.thewheelchairlift.co.uk
Unit 3, Jefferson Way, Thame, Oxon
OX9 3SZDRAINAGE & P
Ring SUZANNE on:
Tel:01844 208595 Fax:01844 208192
Email: info@thewheelchairlift.co.uk
Enquiry No. 502
01435 863500
www.atdonline.eu
See inside back cover for Reader Enquiry Card or go online: www.atdonline.eu 33
Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36