在车辆高速行驶时,为在沥青面层上获得满意的抗滑阻力、路面面层上宏观纹理必须是适宜的。这种性质的量测是通过纹理深度获得的。而纹理深度又取决于铺砂试验。在这个试验里,将已知体积的干细砂铺在面层上,充填面层沉落地方,整修顶部构成一个圆形的水平面。纹理深度就是根据砂子体积除以铺砂面积计算出来的。 When the vehicle is moving at a high speed, the macroscopic texture of the road surface must be suitable for obtaining satisfactory anti-skid resistance on the asphalt surface. This measure of nature is obtained by texture depth. The depth of the texture depends on the sand test. In this test, a known volume of dry fine sand is spread over the surface layer to fill the area where the surface layer sinks and the top of the renovation forms a circular horizontal surface. Texture depth is calculated by dividing the sand volume by the sand area.