An Australian research team from Swinburne University of Technology have created an eco-friendly bendable concrete that could save buildings from buckling during earthquakes the material, is made out of waste products such as fly ash – a by-product of coal-fired power stations.

It’s suited to earthquake zones in countries such as Japan and New Zealand where the brittle nature of conventional concrete leads to catastrophic structural damage.

‘Our laboratory test results showed that this novel concrete is about 400-times more bendable than normal concrete, yet has similar strength,’ said Dr Behzad Nematollahi at the Faculty of Science, Engineering & Technology at Swinburne University of Technology in Melbourne.

‘Building in areas vulnerable to that sort of natural disaster is one of the main uses that we can see for this material.

‘Its quality has a massive effect on the resilience of our infrastructures such as buildings, bridges and tunnels.’

Traditional concrete is not only prone to shattering when stretched or bent, but produces a huge carbon footprint.

This is because the production of cement involves heating limestone to extremely high temperatures, which releases carbon dioxide.

Using industrial waste products makes this process – which has been patented by the team of developers – much more sustainable.

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The team used a low-calcium fly ash supplied from Gladstone power station in Queensland, Australia and two types of slags – a glass-like by-product formed in smelting and welding.

Production of this bendy concrete requires about 36 per cent less energy and emits up to 76 per cent less carbon dioxide compared to other flexible concrete methods.

The inclusion of short polymeric fibres in the mix – a type of man-made fibre that used synthetic chemicals – creates multiple ‘hair-sized cracks’ when put under tension to prevent it from breaking.

Cracks in conventional concrete can make it less resilient against earthquakes or tornadoes, as well as man-made forces, such as bomb blasts in terrorist attacks.

This new creation is able to bend when force is applied to it, meaning buildings made from it will be more likely to remain intact during earthquakes, hurricanes, blasts or projectile impacts.

This is vital because of the reliance on concrete in new infrastructure projects worldwide.

‘Concrete is the most widely used construction material in the world – in fact, it is the second-most consumed material by human beings after water,’ Dr Nematollahi said.

The finding is published in the journal Construction and Building Materials.

Bendy concrete is not an entirely new creation – one laboratory at the University of Michigan has been taking its inspiration from iridescent material on the inside of sea snail shells to develop its own version.

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Nacre, the coating on the inside of sea snail shells, is highly pliable, allowing the shell to resist impacts without fracturing.

This is thanks to a natural layer of elastic polymer that allows the shells to slip from side to side under stress.

The University of Michigan’s resulting creation – engineered cementitious composite, or ECC — has 300 to 500 times more tensile strain capacity than normal concrete.