The Highways Term Maintenance Association (HTMA) has flagged up concerns about the proposed reclassification of bitumen as a carcinogenic when it is in a hot mix. The International Agency for Research on Cancer (IARC) is expected to report shortly on bitumen classification which could see a change from 'class 3' (insufficient knowledge) or 'class 2' which would imply restrictions on use.
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HTMA, which represents maintenance industry service providers, says that greater restriction would have cost implications, as the cost per tonne would rise and there would need to be a change to warm-mix and low temperature asphalt.
