Workers across Argentina struck on Thursday of last week in the second general strike of the year.
Three of the five main union confederations supported the strike.
Some unions, including the powerful bus workers’ union, stood by the centre left government of Cristina Fernandez de Kirchner.
But trains were stopped, and port workers shut the Rosario grain export terminal.
Far left activists led blockades of major roads.
Rising inflation has wiped out wages or pushed workers into higher income tax brackets.
CGT union leader Hugo Moyano said unions could call a 48-hour strike.