期刊
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
卷 64, 期 3, 页码 247-256出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10064-004-0267-0
关键词
SEM-EDX; asphalt and anti-skid aggregate; studded tyre test method; Los Angeles test method; particle size distribution; petrography; PM10
Urban road dust is formed during wintertime when cars use studded tyres and when anti-skid aggregate particles are being crushed under tyres. A road simulator fitted with studded and friction winter tyres was used in three test series in order to investigate dust formation at tyre and pavement interface with various anti-skid materials and tyre types. The bedrock and glaciofluvial anti-skid aggregates tested had variable mechanical-physical and mineralogical properties. A special emphasis was put on the particle size distribution of anti-skid materials and on asphalt aggregate characteristics. The proportions of particles < 10 mu m from asphalt vs anti-skid aggregate was defined with SEM/EDX. The results of this study indicate that the particle size distribution is the most important property of anti-skid aggregates, and that the wearing process of asphalt pavement is not homogenous with friction and studded tyres, and with various anti-skid aggregates. The mechanical-mineralogical relationship between anti-skid and asphalt aggregates is one decisive factor in PM10 formation and these properties affect the proportions of PM10 (anti-skid vs asphalt aggregate). Friction tyres and anti-skid aggregates with lower average hardness compared to asphalt aggregate cannot wear harder minerals (e.g., quartz) of the pavement aggregate homogeneously.
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