00730288

Component

https://doi.org/10.3141/1539-15

http://scholar.google.com...Uzan&publication_year=1996

Because the Superpave system is not readily available for use, an interim pavement design and rehabilitation method was developed that can be used for Israeli traffic and environmental conditions. The existing method was upgraded to include most of the relevant available information and to produce reliable pavement design for the specific conditions in Israel. The upgrading concentrated on multiple topics. An axle-load distribution specific to Israeli conditions was included because analysis indicates that axle loads in Israel are typically above the standard 80-kN single axle load. The extended California bearing ratio (CBR) method was adapted to a variety of axle-load combinations by using Miner's law for damage accumulation. Converting the axle-load distribution to the standard 80-kN equivalent single axle load leads to underdesign of approximately 10% in pavement thickness (or to a reduction of about 70% of the design life). A fatigue consideration to determine the asphalt-layer thickness was added. Local temperatures were analyzed to determine an equivalent temperature for fatigue calculation. For Israeli conditions, an equivalent temperature of 14 deg C can be used countrywide for asphalt-layer thicknesses up to 250 mm. An overlay design method consistent with the upgraded design procedure was assembled. It includes backcalculation of layer moduli to determine the subgrade CBR and the quality of the pavement layers; pavement condition surveys to evaluate a representative effective thickness of the asphalt layer; and component-layer analysis to determine the overlay thickness.

This paper appears in Transportation Research Record No. 1539, Flexible Pavement Design and Rehabilitation Issues.

English

p. 110-115

1996

Transportation Research Record

0309059127

Figures (2) ; References (23) ; Tables (4)

Axle load force; Backcalculation; California bearing ratio; Condition surveys; Design methods; Driver rehabilitation; Equivalent single axle loads; Fatigue (Mechanics); Flexible pavements; Layer coefficient (Pavements); Load transfer; Modulus; Overlays (Pavements); Pavement design; Pavements; Subgrade (Pavements); Thickness; Traffic equivalence factor

Layer moduli; Pavement thickness; Rehabilitation

Israel

Israel

Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB

Dec 19 1997 12:00AM

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