There are several magazines online about infrastructure and project finance. These can be recommended:
infra-news.com (Charged service)
infrastructurejournal.com (Charged service)
projectfinancemagazine.com (Partly free)
pfie.com (Partly free)
Research Papers and News
Brownfield, Greenfield, Public-Private Partnerships (PPP), Private Finance Initiative (PFI), Private Infrastructure Funds, Listed Infrastructure Funds, Infrastructure Investments