UTRUSTNING FOR UPPVERMNING AV DE OVRE LAGREN AV ASFALTBELEGGNINGAR ELLER LIKNANDE

摘要

The embodiment of the invention disclosed herein is directed to equipment for heating the upper strata of asphalt concrete pavement. The equipment includes a chamber having a chamber-forming wall including a roof adapted to overlie an area of the pavement to be heated, and wherein the chamber-forming walls provide downwardly extending peripheral side portions having lower edges adapted to be closely spaced from the pavement. Heater means are positioned within the chamber so formed for heating the pavement therebeneath. A horizontally disposed exhaust manifold unit is secured to each side of the roof of the heating chamber and directed forwardly of the chamber. The exhaust outlet opening of the exhaust manifold is located at the forward portion of the chamber and includes a downwardly directed outwardly flaring portion through which the hot gases emanating from the exhaust manifold are directed to the surface of the asphalt concrete pavement in front of the heating unit to preheat the pavement. The outwardly directed flaring configuration of each of the exhaust manifolds provide means for preheating the edge most portion of the area beneath the chamber.