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27. Oct 2017 | Coatings Technologies

New concrete makes buildings earthquake-resistant

Researchers have developed a new fibre-reinforced concrete that can make buildings earthquake-resistant. The technology could save the lives of citizens throughout the world.

A researcher inspects EDCC-reinforced wall after earthquake simulation test. Source: UCB

The material is engineered at the molecular scale to be strong, malleable, and ductile, similar to steel-capable of dramatically enhancing the earthquake resistance of a seismically vulnerable structure when applied as a thin coating on the surfaces.

Successful simulation tests

Researchers at the University of British Columbia in Vancouver, Canada, subjected the material, called eco-friendly ductile cementitious composite (EDCC), to earthquake simulation tests using intensities as high as the magnitude 9.0-9.1 earthquake that struck Tohoku, Japan in 2011. Their new development will see its first real-life application this fall as part of the seismic retrofit of a Vancouver elementary school.

10 millimetre-thick layer is enough

"We sprayed a number of walls with a 10 millimetre-thick layer of EDCC, which is sufficient to reinforce most interior walls against seismic shocks,” says Salman Soleimani-Dashtaki, a PhD candidate in the department of civil engineering at UBC. "Then we subjected them to Tohoku-level quakes and other types and intensities of earthquakes - and we couldn’t break them.” Other applications include pipelines, pavements, offshore platforms, blast-resistant structures, and industrial floors.

Cement with polymer-based fibres

EDCC combines cement with polymer-based fibres, flyash and other industrial additives, making it highly sustainable, according to UBC civil engineering professor Nemy Banthia. "By replacing nearly 70 per cent of cement with flyash, an industrial byproduct, we can reduce the amount of cement used,” he said. "This is quite an urgent requirement as one tonne of cement production releases almost a tonne of carbon dioxide into the atmosphere, and the cement industry produces close to seven per cent of global greenhouse gas emissions.”

EC Techb Report Sustainability

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EC Tech Report Sustainability

Making coating systems more environmentally compatible is a burning issue for everyone in the industry, and one that is being fuelled by the European Green Deal. Learn all you need to know about sustainable coatings, how to produce coatings in a more environmentally friendly way and how to give coated products a longer service life. You will find an overview in the EC Tech Report of the many various approaches being adopted. We will dive deep into the European Green Deal, its key points and main purpose as well as consequences for the coating industry, see which new raw materials are being developed to replace or lower the content of products in the SVHC group and learn about different approaches to sustainable paint formulation.

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