Hanson explodes the myths about concrete
Published: 02 March, 2011
LONDON: At Ecobuild, heavyside manufacturer Hanson explained its work to reduce carbon emissions, protect resources and launch alternative materials.
Jasen Gauld said the company's sustainable cement replacements were a big feature of future developments.
"The use of waste-derived materials as cementitious replacements for natural raw materials helps to deliver sustainable credentials," he explained.
The UK concrete sector already uses and recycles more waste than it produces and cement substitutes such as ground granulated blastfurnace slag (GGBS) and pulverised fuel ask (PFA) have a key part to play in constructing low carbon buildings of the future.
Hanson, which claims to be the only UK manufacturer of GGBS, said this product is an 'upcycles' material.
It is a by-product os iron-making in which molten slag from blast furnaces is rapidly cooled and dried to form a granulated materials. This is then ground down to a fineness similar to that of Portland cement.
GGBS lowers embodied C02 and is said to enhance durability and resistance to deleterious attack. It also reduces the risk of early age thermal cracking.