A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Field Verification of KDOT's Superpave Mixture Properties to Be Used as Inputs in the NCHRP Mechanistic-Empirical Pavement Design Guide
In the MechanisticEmpirical Pavement Design Guide (M-EPDG), prediction of flexible pavement response and performance needs an input of dynamic modulus of hot-mix asphalt (HMA) at all three levels of hierarchical inputs. This study was intended to verify that this input modulus could be achieved in the field construction. Five newly built Superpave pavements for calibration of M-EPDG by the Kansas Department of Transportation and four Superpave pavement test sections on the Kansas perpetual pavement project on US-75 were selected as test sections in this study. Deflection data on all test sections was collected with a Dynatest 8000 Falling Weight Deflectometer. Normalized deflection data for all calibration sites and US-75 sections were used to back-calculate asphalt layer moduli using three backcalculation computer programs, EVERCALC, MODCOMP II and MODULUS. Laboratory dynamic modulus tests were conducted on asphalt concrete (AC) cores from five calibration sites and on laboratory-compacted samples from the US-75 perpetual pavement sections. Dynamic modulus was also predicted with the Witczak equation, new Witczak model and Hirsch model. The results show that the surface deflection was highly affected by the test temperature for calibration sites whereas test temperature and pavement thickness highly affected surface deflections for perpetual pavement sections. Repeating different target loads reduces nonlinearity significantly. Laboratory dynamic modulus on US marked highways is higher than on Kansas marked highways for the calibration sites.
Field Verification of KDOT's Superpave Mixture Properties to Be Used as Inputs in the NCHRP Mechanistic-Empirical Pavement Design Guide
In the MechanisticEmpirical Pavement Design Guide (M-EPDG), prediction of flexible pavement response and performance needs an input of dynamic modulus of hot-mix asphalt (HMA) at all three levels of hierarchical inputs. This study was intended to verify that this input modulus could be achieved in the field construction. Five newly built Superpave pavements for calibration of M-EPDG by the Kansas Department of Transportation and four Superpave pavement test sections on the Kansas perpetual pavement project on US-75 were selected as test sections in this study. Deflection data on all test sections was collected with a Dynatest 8000 Falling Weight Deflectometer. Normalized deflection data for all calibration sites and US-75 sections were used to back-calculate asphalt layer moduli using three backcalculation computer programs, EVERCALC, MODCOMP II and MODULUS. Laboratory dynamic modulus tests were conducted on asphalt concrete (AC) cores from five calibration sites and on laboratory-compacted samples from the US-75 perpetual pavement sections. Dynamic modulus was also predicted with the Witczak equation, new Witczak model and Hirsch model. The results show that the surface deflection was highly affected by the test temperature for calibration sites whereas test temperature and pavement thickness highly affected surface deflections for perpetual pavement sections. Repeating different target loads reduces nonlinearity significantly. Laboratory dynamic modulus on US marked highways is higher than on Kansas marked highways for the calibration sites.
Field Verification of KDOT's Superpave Mixture Properties to Be Used as Inputs in the NCHRP Mechanistic-Empirical Pavement Design Guide
D. Gedafa (author) / M. Hossain (author) / S. A. Romanoschi (author)
2009
247 pages
Report
No indication
English
Road Transportation , Transportation Safety , Transportation , Transportation & Traffic Planning , Administration & Management , Highway Engineering , Construction Equipment, Materials, & Supplies , Computers, Control & Information Theory , Pavements , Design guide , Hot-mix asphalt , Kansas Department of Transportation , Asphalt concrete cores , Computer programs , National Cooperative Highway Research Program (NCHRP) , Mechanistic Emperical Pavement Design Guide (M-EPDG) , Hot-mix asphalt (HMA) , Kansas Department of Transportation (KDOT)
| British Library Conference Proceedings | 2006
NCHRP Determines Superpave Protocols for Modified Binders
British Library Online Contents | 1999