Murray & Roberts Infrastructure expects two roadworks rehabilitation contracts on the N2 in Kwazulu-Natal awarded to it by Sanral, to be completed in November. Murray & Roberts Infrastructure was established through the integration of Concor Civils and Concor Roads & Earthworks into a new single business.
Both contracts, already under way, included periodic maintenance, with the first contract overseeing a 22-km stretch between the Umzinto river to the Umkomaas river. and the second the rehabiliation of a 14.5-km stretch between where the N2 crossed the Umlaas canal to Spaghetti Junction.
Project manager Bennie Hook said the projects involved milling out a layer of the existing asphalt and replacing it with new material, followed by a final ultrathin friction course (UTFC) layer on top.
This would entail using a Comar mobile asphalt plant which provided the recycled asphalt pavement (RAP) mix for the projects. Both projects would use a 40% RAP content.
“The project is pretty straightforward. However, obtaining the correct RAP mix is tricky, as the varying binder content of the old asphalt affects the ratios of the mix. This has to be monitored closely as quality control is critical,” he noted.
http://www.engineeringnews.co.za/article/n2-roadworks-to-be-completed-by-november-2015-02-03/rep_id:3182
