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From page 92... ...
81 CHAPTER EIGHT IMPROVEMENT OF PAVEMENT ECONOMICS AND MANAGEMENT THROUGH ACCELERATED PAVEMENT TESTING APPLICATIONS INTRODUCTION This chapter in effect represents the core of what APT programs are about. Unfortunately it is also an area where sufficient information is often not available.
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82 TABLE 4 APT BENEFITS RELATIVE TO FIELDS OF ACTIVITY IN PAVEMENT ENGINEERING APT Program Description (a) Benefits of APT: Improved structural design procedures APLF Structural responses measured with strain gauges and LVDTs are used to improve design procedures and modeling techniques.
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83 TABLE 4 (Continued) APT Program Description (f)
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84 vehicle–pavement interaction. During the course of trafficking, pavement sections had to be rehabilitated as a remedial measure to remove roughness and reinstate failed sections.
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85 The DIVINE project (OECD 1998) , discussed in chapter three, provided conclusive evidence of the effect of interaction between suspension, quality of initial construction, and pavement materials on surface deterioration.
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86 nature of the pavement structure was such that it would not have been possible to conduct an experiment of this kind in any other way. An extensive source of knowledge was built up.
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87 ommend guidelines for their collection, storage, and retrieval. As mentioned earlier in the synthesis, a close link has been established with the COST 347 program, which provides access to the European APT activities (website: http:// www.cordis.lu/cost-transport/src/cost-347.htm)
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88 has been completed and one roadway study is under way. Aircraft load carts and military trucks are being used in conjunction with the HVS–A (Bigfoot)
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89 taminated in the reclamation process after treatment with foam asphalt. The contamination relates to the presence of granular base material and possibly subgrade soil inadvertently mixed in during the reclamation process.
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From page 101... ...
90 • Quad-axle groups with an allowable loaded mass 3 tons greater than the allowable mass of a tri-axle, and • An increase in tire pressure to 850 kPa. Clearly, these developments are most likely to be explored through APT in Australia, but also elsewhere in the world as trends cross international borders.
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