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Old 9th October 2016, 19:24   #1
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Default Indian professor tests self-repairing road in Karnataka

Found this interesting news item:

Indian origin Canadian professor tests road that self-repairs in Karnataka

Quote:
Construction of the road, which connects Thondebavi to the highway and replaces a dilapidated dirt track, was completed in the late winter of 2015, but the last few months were critical as it had to be monitored for how it lasted through the extreme heat of an Indian summer and the monsoon. Now, it can be claimed a success.
The road’s thickness, at about 100 mm, is about 60% less than that of a typical Indian road, reducing cost and materials. About 60% of the cement is replaced with flyash, thus curbing the usual carbon footprint, especially as cement production releases greenhouse gases. It comes with built-in crack healing, as high strength concrete is supplemented with fibre reinforcement with nano-coating that makes it absorb water and keeps the road hydrated.

Banthia described this as a “cute mechanism” and explained: “These are fibres which have a hydrophilic nano-coating on them. Hydrophilia means they attract water and this water then becomes available for crack healing. Every time you have a crack, you always have unhydrated cement and this water is now giving it the hydration capability, producing further silicates which actually closes the crack in time.”
I hope BHPians with knowledge of the technologies used can help us understand more about this topic.


Last edited by GTO : 10th October 2016 at 12:26. Reason: Adding video :)
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Old 10th October 2016, 12:31   #2
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Default Re: Indian professor tests self-repairing road in Karnataka

Two more videos for those interested in the topic:



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Old 19th October 2016, 12:19   #3
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Default Re: Indian professor tests self-repairing road in Karnataka

Quote:
Every time you have a crack, you always have unhydrated cement and this water is now giving it the hydration capability,
Smart and nifty.

This is the reason why cement and concrete cracks - dehydration.
So the road will behave a bit like wood now!
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