| 摘要 |
Disclosed herein is an embodiment of a heater for use in repaving asphalt concrete roadways, and the like. The heater utilizes fuel, such as pentane, to direct a flame into a radiant heating target element by means of a nozzle which changes the direction of the flame from a combustion chamber and a deflector to redirect and focus the flame onto the radiant heating target element. The flame is redirected radially outwardly along the radiant heating target element so that the flame will not impinge on the road surface, thereby providing substantially entirely radiant heat to heat the road surface. Such radiant heating burners will penetrate the road surface to a depth of one inch or more in a relatively short period of time whereupon the heated and softened asphalt together with portions thereof beneath the heated portions are excavated. Additional heat is applied to the excavated material to further soften it and small quantities of new aspahlt material may be added if desired before the reworked material is again laid to form a road surface. |
