Library builder

One of the best-known applications of an SMA mixtures for airfields is the northern runway of the airport in Frankfurt on the Main (Fraport). It has become famous not only because of the SMA application but also because of the atypical arrange­ment of the reconstruction of the runway pavement. The 2-year long removal of the […]

Despite the fast growth of applications on road pavements, SMA does not enjoy great success on airfields. This is because of the unique requirements for airfield pave­ments and special problems with SMA, which include the following: • Combining high macrotexture with low permeability • Low-initial antiskid properties and the impossibility of using gritting (FOD risk) […]

Requirements concerning wearing courses of airfield pavements are defined as fol­lows (namely, in the regulations of the U. S. Federal Aviation Agency (FAA) Advisory Circular AC No. 150/5370-10B): • Be impermeable to water and suitably protect intermediate course. • Provide surface free of foreign object damage (FOD) (i. e., loose particles). • Resist loads from […]

This chapter describes some special applications of stone matrix asphalt (SMA). Several brief case studies illustrate some of the less common, though advantageous, ways SMA mixtures can be used and also suggest some areas where they should be used with caution. 13.1 AIRFIELD PAVEMENTS According to a report by the European Asphalt Pavement Association (EAPA), […]

In most countries, SMA mixtures are more expensive to construct than comparable mixtures of AC. Higher initial prices result from the application of the following: • Larger amounts of binder (or a PMB) • Greater amounts of added filler • Large quantities of high quality coarse aggregates • Stabilizers (most often fibers) • Higher production […]

The European Asphalt Pavements Association and Eurobitume report of 2004 entitled Environmental Impacts and Fuel Efficiency of Road Pavements (Beuving et al., 2004) is one of the main sources forming the basis for this section of the present chapter. Rolling resistance is one of the numerous factors of intense interest when con­sidering the problem of […]

Figure 12.10 shows the results from tests of water permeability of an SMA mix­tures with gradations 0/4.75, 0/9.5, and 0/12.5 mm (Cooley and Brown, 2003). All instances concern U. S. SMA, previously described in Chapters 6 and 7. Figure 12.10 clearly shows the relationship between the maximum aggregate size of the SMA and the probability […]

For many people the surface appearance of an SMA course gives the impression of being excessively water permeable. Indeed, SMA differs from AC due to a substan­tially deeper macrotexture. SMA courses with an increased content of voids may occasionally be seen in practice, most frequently when the mixture was improperly compacted on a work site […]

The safety provided by wearing course mixtures is of primary importance. The anti­spray properties of some mixes enhance safety by preventing the buildup of water mist behind vehicles. After rainfall (or melting snow), drops of water are raised up from a pavement by vehicle tires, especially the tires of large, fast-moving vehicles. Consequently, a certain […]

Durability tests of asphalt mixtures, especially those intended for wearing courses, have become commonly used around the world (Hobeda, 2000; Sybilski and Mechowski, 1996). The above-average durability of SMA has been emphasized in numerous publications so they will not be described here. This durability is the result of a high binder content and a thicker […]