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22 October 2015

Netherlands: H4A tests tarmac with lignin

First publishedon www.AggBusiness.com
Dutch construction company H4A is testing a new type of tarmac which uses lignin to bind the sand and gravel together.

It is said that nothing unusual has been noticed about the bio-tarmac in four months but the tarmac is yet to be tested in the autumn and winter months.

Lignin replaces bitumen, which makes up some 4%-5% of tarmac, and of which between 400,000-500,000tonnes are used each year.

Lignin is harder and is not affected by rain and UV. It also needs to be heated to a lower temperature than bitumen which will reduce energy consumption.
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