The effect of surface roughness on the measurement of slip resistance

摘要

Friction coefficient is widely used to measure slipperiness. It is also known that surface roughness affects friction. Surface roughness on quarry tiles was systematically varied by sand blasting. The relationship among slip resistance, tilesurface roughness, surface conditions and slipmeters used was investigated. The results indicated that the effect of surface roughness on friction index depends on the slipmeter used, due to the different characteristics among these slipmeters. It wasalso shown that tile surface roughness could be correlated with the measured friction index. For dry surfaces, surface parameters R{sub}a and R{sub}(3z) (see Table 1 for definitions) had the highest correlation with the measured friction indices among 21surface parameters evaluated in the study. Surface parameters R{sub}(pk) and R{sub}(pm) bad the highest correlation with the measured friction indices for wet surfaces. A rougher surface generally led to a higher friction index. For wet surfaces,moreover, sharper and higher peaks with an optimal high peak density on tile surfaces could increase friction index further.