/tags/vulcan-materials Vulcan Materials en-US Copyright Tue, 13 Dec 2011 14:35:00 GMT /business-economy/2011-12-13/martin-marietta-seeks-to-take-over-rival Raleigh-based Martin Marietta wants to merge with its main competitor. What started out as a private negotiation is now a hostile takeover.Martin Marietta… Tue, 13 Dec 2011 14:35:00 GMT /business-economy/2011-12-13/martin-marietta-seeks-to-take-over-rival Leoneda Inge