The High Court has granted an injunction preventing the obstruction of the entrance to a quarry in Gort in Co Galway.
Peter Good of Good Concrete sought the injunction against Peter Howley.
The court was told there was a dispute in which Peter Good alleged the diesel supplied by Mr Howley was contaminated and Mr Howley alleged he was owed €90,000 by Mr Good's company.
On Friday morning, Mr Good said the entrance to his quarry at Sheehaun in Gort was blocked by six vehicles.
Mr Good said he had a contract worth €8m with SIAC Willis to provide concrete for the new motorway between Gort and Cusheen and SIAC had told them they would have to source the concrete elsewhere unless he could restore supply.
The case will be before the court again tomorrow morning.