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- W646945508 abstract "The determination of the in-situ pavement material moduli is an essential step in the non-destructive structural evaluation of flexible pavements. If the modulus values of the various layers can be determined, then the remaining pavement service life can also be predicted. This mechanistic evaluation can then serve as a rational basis for pavement management systems. This paper describes the results of a research project designed to determine the in-situ modulus values and remaining pavement life based upon the deflection basin obtained from a road rater device. Elastic layer theory and the Gaussian method of elimination were used to formulate surface deflections in terms of elastic modulus, load intensity, and layer thickness. The resulting equations were used to analyze the effect of changing layer modulus on the surface deflection. On the basis of this analysis, a computer program for calculating in-situ modulus values from road rater deflection basins was developed. The calculated in-situ modulus values were then used to calculate the maximum tensile strain in the bituminous concrete base layer of a four layer pavement system. The road rater deflection basin was used to calculate the surface curvature index, sci, the base curvature index, bci, and the base damage index, bdi. These criteria were correlated with the maximum tensile strain, the fatigue cracking of the pavement sections and the traffic loading. A relationship was established between the sci and the traffic loading resulting in the prediction of remaining pavement life. Results are presented graphically in terms of the structural number (sn) of the pavement section.(a) for the covering abstract of the conference see IRRD 815640." @default.
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- W646945508 date "1982-01-01" @default.
- W646945508 modified "2023-09-26" @default.
- W646945508 title "EVALUATION OF IN-SITU MODULI AND PAVEMENT LIFE FROM DEFLECTION BASINS --PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON THE STRUCTURAL DESIGN OF ASPHALT PAVEMENTS HELD DEFLT UNIVERSITY OF TECHNOLOGY, AUGUST 23-26 1982. VOL 1 AND 2. -- NETHERLANDS" @default.
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