High-friction surfacing

Industrial or environmental problems caused by high frictional surfaces of materials exist in our daily life. The search for materials with a low surface friction has been one of the classical and everlasting research topics for material scientists and engineers. Despite many efforts, it has been shown that surface modification or adding of lubricant are not very effective in reducing the steady-state sliding friction between two solids, which show a frictional coefficient jU 10 even in the presence of lubricant [38],... 

The traffic level is expressed in terms of the expected commercial vehicles (cv) per lane, per day (cv/lane/day). HFS, specialised high friction surfacing, incorporating calcined bauxite aggregate. 

HFS, specialised high-friction surfacing, incorporating calcined bauxite aggregate. 

A rapid change from a slippery surface to a high friction surface can be hazardous. In this simation, people may smmble, rather than shp. In a smmbUng fall, the foot encountering a high friction surface may lock and not move or pivot as expected. With the rapid change in surface conditions, a person s body moves faster than the feet and creates an unstable condition. 

Similarly, a sudden change to a high friction surface can require adjustments. Failure to adjust may lead to a fall forward. The second surface may prevent movement between the shoe and the surface. 

Provide high-friction surface on the High Street northbound approach to the traffic signals. 

On high-speed approaches, the length of high-friction surfacing should be increased. 

High-friction surfacing on the approach to a pedestrian crossing... 

I high-friction surfacing not specified (or too short for the approach speeds) ... 

In the case of high-friction surface finishes, such as OSP-copper, forces appUed during the press-fit process may be so great as to cause damage to the PTH barrel or adjacent inner- or onterlayer circuit traces. Check the board visually and by electrical test as part of a first article inspection. 

Use Heavy Duty Staticide for porous, absorbent, or high friction surfaces. On a hard surface, one gallon of Heavy Duty Staticide will cover several thousand square feet and last from eeks to months, depending upon the application. 

It is common sense that friction between the paste and the aperture walls has a strong influence on paste transfer. This has implications both for materials and fabrication technologies. For example, the electro-forming process results in inherendy smooth aperture surfaces. This is enhanced by the low coefficient of friction displayed by nickel, from which electro-formed stencils are generated. On the other hand, laser-cut apertures present a relatively high friction surface, even though they are demonstrably adequate for many applications. If market pressures demand, stencils cut by laser from nickel-rich stainless steel may provide a workable balance of outright paste-release efficiency, turnaround time and overall stencil cost. 

Economic rates of return of 500% have been achieved by using high-friction surfacing as a mass action progranune at pedestrian crossings, bends, and approaches to roundabouts. 

Figure 6.22 The high-friction surface should be long enough for the speed of traffic...

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