Tire Tread For Heavy Vehicle Of Construction Plant Tire

A tire for a heavy vehicle of construction plant type, comprising:

• a tread comprising raised elements separated by grooves;
• each raised element extending radially outwards from a bottom surface as far as a contact face over a height H and comprising lateral faces;
• each said groove being a cut in the tread which cut is delimited laterally by lateral faces of raised elements that face one another and is delimited radially towards the inside by a groove bottom resting on the bottom surface;
• the tread comprising at least one first elastomeric compound, referred to as base compound, and at least one second elastomeric compound, referred to as painting compound, fully covering the base compound;
• the base compound and coating compound respectively having elongations at break at 23° C. AR1 and AR2;
• wherein the coating compound has a constant maximum thickness emax, at the contact face of each raised element, at most equal to 0.15 times the height H of the raised element, wherein the coating compound has a constant minimum thickness emin, at each groove bottom, at least equal to 0.04 times the height H of the raised element, and wherein the elongation at break at 23° C. AR2 of the coating compound is at least equal to 1.05 times the elongation at break at 23° C. AR1 of the base compound.