Abstract
An increase oftire/road noise level was measured as the surface roughness of porous pavement decreases under its auface treatment The new surface evaluation method by micro-texture based on wearing out of asphalt-mortar and clogging condition is proposed assuming nonmovement of the coarse aggregates. The result of the text= analysis shown the existence of the non-movement duration of the aggregates, then it is confirmed that the proposed method can evaluate the changes of micro-texture and that an adequate correlation between the changes of microtexture and the dynamic friction coefficient And then, it is estimated that the increase of tire/road noise level after surface treatment is generated by the sfick-slip phenomena of tire tread block.
