Use of catalytically oxidised asphalt precursors as rutting reducing additives in paving asphalt cements

摘要

A process to prepare a paving asphalt cement which comprises(a) catalytically oxidizing an asphalt precursor to form a catalytically oxidized asphalt cement; and,(b) mixing the catalytically oxidized asphalt cement with an asphalt precursor to obtain the desired grade of paving asphalt cement.