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The Times of India
The Times of India
World
TOI World Desk

Switzerland reused old road concrete in 1990, and recycled mixes stayed durable for 20 years

In 1990, the A13 between Oberriet and Haag in the St Gallen Rhine Valley was converted from a motorway to an autobahn, and the 1967 road was completely renewed. Its old concrete pavement was crushed and processed. At the same time, a large-scale experiment put the recycled aggregate into new road concrete, where it made up 66 to 100 per cent by mass. These mixes were compared with a reference concrete made only from natural aggregate. After 20 years of use, all the recycled concretes were still in a good or very good state, according to the report for the Swiss Federal Roads Office.

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