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Recycled materials may become bricks of the future - COMMENT UPDATE

A building block made almost entirely of recycled materials that is six times as strong and uses less energy to produce than concrete blocks could be available in three years.

The Bitublock can be made from glass, metal, slag, sewage sludge, incinerator ash and pulverised power station fuel ash.

University of Leeds civil engineer Dr John Forth, who has been helping to develop the Bitublock, believes it could revolutionise the building industry by providing a sustainable, low energy replacement for the 350 million concrete blocks manufactured in the UK each year.

Bitumen is used to bind the mixture of waste materials together before it is compacted into a mould to form a solid block, which is then heat cured. This oxidises the bitumen so it hardens like concrete making it possible to use a higher proportion of waste in the Bitublock than in cement or clay binder.

He said: Our aim is to completely replace concrete as a structural material. Bitublocks use up to 100% waste materials and avoid sending them to landfill, which is quite unheard of in the building industry.

Comment
23/04/07: Is this Byker all over again? Encapsulation of haz & toxic waste into a solidification process will not effectively detoxify haz waste nor indeed do I think it will qualify under the EC WAC by using a fossil fuel based binder in a solidifaction process. This concept has been tested in Germany and results show that chemical re-activity will occur at some stage in the future. Bottom Ash from EFW? Okay (if metal extraction has taken place) then for building material but encapsulation of Fly Ash? Anyway, yes, I will agree with the base concept but only in so far as it mirrors to a degree our own European & USA Patented Scientific Waste Technology and which is about to be launched in the UK and will equally also be available for Peer review. However, please show me proven evidence that a signifcant Molecular change within the molecules Atomic Nucleous has taken place. Or in other words has the molecular matrix of the haz & toxic waste been altered with electron displacement? Bottom line, is the claim that haz, toxic and biodegradable waste can be converted into inert and inactive waste and which is incapable of further chemical reactivity? Our Patented Technology can and just like the author we will subject our Technology to any form of Peer review. Watch this space!
Posted by Elastic Stone

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