The base course material null which designates the steel slug as the main

摘要

PURPOSE:To obtain such a subbase course material as no crack or no swelling is generated on the road surface of a pavement by adding coal ash containing desulfurized gypsum in a specific ratio to steel slag to mix. CONSTITUTION:Coal ash containing desulfurized gypsum is added to steel slag with a specific ratio of 0.05 - 0.3 wt. % having an equivalent quantity to SO3 to mix, and a coal ash adding and mixing subbase course material 2a is manufactured. The coal ash adding and mixing subbase course material 2a as an upper layer subase 2 is constructed on a lower layer subbase 3 consisting of crusher-run, etc. constructed on a road bed 4. In addition, asphalt concrete 1 is constructed thereon.