News - June 29, 2017

Organic asphalt smells woody

Roelof Kleis

The new organic asphalt cycle path between the Bornsesteeg and the Kielekampsteeg, which was officially opened on Monday, is nothing out of the ordinary to look at.

Photo: Guy Ackermans

But it smells different. Woody. That is because the bitumen, an adhesive made out of petroleum, has been partially replaced by lignin, the polymer which lends firmness to materials such as wood, grass and straw. Wageningen Food & Biobased Research has been doing research on ways of using this polymer for years. Three kinds of lignin have been used in the Wageningen cycle path.