Exclusionary measures are the best treatment for pavements ants whose nests are located outdoors. Sealing all cracks and crevices with caulk will eliminate the entrances used by foragers, keeping them outside. A vigorous application of rubbing alcohol will also remove any remnants of the ant’s pheromone trails, and further foraging can be discouraged by promptly storing or disposing of greasy and sweet foods.
http://bit.ly/29UVr3h