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https://theconversation.com/a-green-trifecta-how-a-concrete-alternative-can-cut-emissions-resource-use-and-waste-192501>
"Building materials and construction generate about 20% of global greenhouse
gas emissions. Much of these emissions are due to the environmentally
unfriendly process of producing ordinary Portland cement, which is widely used
in construction materials such as concrete and mortar.
Portland cement production generates about 2.6 billion tonnes of carbon dioxide
(CO₂) a year – more than 7% of annual global emissions. Cement emissions have
doubled in the past 20 years. And over the next 40 years, construction is
expected to double the building floor area worldwide.
Every tonne of cement produced also uses about 1.6 tonnes of raw materials,
including fuels and other resources. Concrete production also uses large
amounts of aggregate such as sand and gravel. This requires energy-intensive
quarrying operations that deplete non-renewable natural resources – the world
is running out of building sand.
The problems of emissions and resource depletion mean suitable substitutes for
Portland cement and natural aggregate are required. Our research shows it is
possible to develop more sustainable construction materials, reinforced using
natural fibres. Industrial byproducts and waste materials can be used to
replace cement binder and aggregate, reducing emissions, resource depletion and
waste."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
