The corrected back-calculation moduli are reasonable and close to the splitting moduli, and its data variation is smaller than that of the uncorrected back-calculation moduli. toolbox backcalculates non-linear pavement layer moduli from actual field data with better accuracy compared to regression and conventional backcalculation. In this paper, a new algorithm for backcalculating pavement layer moduli from pavement deflection basin is presented. The results show that the quintic polynomial is effective at eliminating the noise information of deflection basin. The back-calculated moduli (with and without deflection basin correction) were compared, and splitting moduli from coring samples of the surface asphalt layer were additionally compared for partial validation. The optimum mathematical regression model for the theoretical deflection basin without interference was analysed using the probabilistic density method, which was then applied to remove the noise information of the in–situ measured deflection basin. The influence of noise, including the pavement surface condition and internal anomalies, on the deflection basin was studied. Estimate remaining structure life, and 2.
![pavement backcalculation modulus pavement backcalculation modulus](http://jase.tku.edu.tw/images/article_images/13/13_2_04.jpg)
The major additions to this system are routines to: 1. Pavements, LTPP, FWD, deflection data, elastic modulus, backcalculation, forwardcalculation, screening of pavement moduli.
#PAVEMENT BACKCALCULATION MODULUS MANUAL#
This report is a Users Manual for MODULUS 5.0.
#PAVEMENT BACKCALCULATION MODULUS SOFTWARE#
The noise in in–situ measured asphalt pavement deflection basin is the primary cause for the difference between the theoretical deflection basin in back-calculating software and measured basin, which affects the accuracy of the modulus back-calculation. Research Study Title: Pavement Design Support MODULUS 5.0 is the latest version of the widely used flexible pavement backcalculation system developed by the Texas Transportation Institute for the Texas DOT.