Banks are asked to make lending to construction projects more accessible on account of the difficulties the industry is facing, including higher interest rates and government budget cuts.
Authorities receive offers for a concession contract at Diego Aracena airport, which serves the city of Iquique.
The Italian firm says it has a "very preliminary and generic interest to examine common projects" with Abertis.
Brazilian water utility Sabesp has called an electronic tender for waterworks engineering services in the Baixada Santista region.
A new PPP contract will be tendered in 2018 and works are expected to be completed by 2022.