Sri Lanka has planned more than $21 billion in public investment through 2015, aiming to revive the island nation's infrastructure after the end of civil war in 2009, the Central Bank Governor Ajith Nivard Cabraal said.

"Our public investment programme is more than $21 billion over the next five years," the Central Bank Governor told Reuters. "It will be around 6.5 percent of our gross domestic product (GDP) each year. This will be spent towards all infrastructure."

Sri Lanka has planned to spend $3.75 billion for public investment this year, $4.43 billion next year and $5.05 billion in 2013, he said. The number will rise to $5.76 billion in 2014 and $6.53 billion in 2015.

The increased infrastructure spending has boosted banks' appetite to capture a piece of the post-war pie. India's Axis Bank last month opened its first branch in Sri Lanka, and said it would focus on loan syndication for infrastructure.