| 摘要 |
Road-surface material intended for dressing asphalted roads comprises crushed rock-material, such as quartzite (SiO2) and a binder, such as pitch. The invention is characterised in that the road-surfacing material also includes an additive material which will fluoresce when irradiated with ultraviolet light and which has been produced by melting-down a mineral and doping the mineral with a substance wich will cause the mineral concerned to fluoresce, and by granulating and/or crushing the material to a particle size corresponding to the particle size of the quartzite. |
