A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation and Response of Aged Flexible Airfield Pavements at Ambient Temperatures Using the Falling Weight Deflectometer
A research study was conducted to evaluate the response of aged flexible airfield pavements at varying ambient temperatures using the Falling Weight Deflectometer (FWD). Eight field tests were performed on three sites at Duke Field, Florida, at pavement surface temperatures ranging from 30 to 130.F. Monthly subgrade moisture readings were taken along with the measuring of pavement temperature profiles during each test. Laboratory tests were conducted on collected asphalt concrete and sand asphalt cores. Tests included low-temperature rheology tests, indirect resilient modulus, and indirect static creep tests (fracture energy). The analysis of the test data provided a reliable and effective method for predicting the asphalt modulus and fracture energy using asphalt viscosity and air void content. Back calculation of layer moduli using measured FWD data was performed by the layered elastic computer program BISDEF. The asphalt concrete modulus (E1)was computed using the developed asphalt modulus prediction equations which BISDEF iterated for the base and subgrade layer moduli. This technique greatly reduced the errors in determining E1 from the iteration process. Uncracked segments of pavement gave good results using the prediction equations for all asphalt layers. However, adjustments to E1 were necessary to accommodate the degradation of modulus due to pavement cracking. Theses. (sdw)
Evaluation and Response of Aged Flexible Airfield Pavements at Ambient Temperatures Using the Falling Weight Deflectometer
A research study was conducted to evaluate the response of aged flexible airfield pavements at varying ambient temperatures using the Falling Weight Deflectometer (FWD). Eight field tests were performed on three sites at Duke Field, Florida, at pavement surface temperatures ranging from 30 to 130.F. Monthly subgrade moisture readings were taken along with the measuring of pavement temperature profiles during each test. Laboratory tests were conducted on collected asphalt concrete and sand asphalt cores. Tests included low-temperature rheology tests, indirect resilient modulus, and indirect static creep tests (fracture energy). The analysis of the test data provided a reliable and effective method for predicting the asphalt modulus and fracture energy using asphalt viscosity and air void content. Back calculation of layer moduli using measured FWD data was performed by the layered elastic computer program BISDEF. The asphalt concrete modulus (E1)was computed using the developed asphalt modulus prediction equations which BISDEF iterated for the base and subgrade layer moduli. This technique greatly reduced the errors in determining E1 from the iteration process. Uncracked segments of pavement gave good results using the prediction equations for all asphalt layers. However, adjustments to E1 were necessary to accommodate the degradation of modulus due to pavement cracking. Theses. (sdw)
Evaluation and Response of Aged Flexible Airfield Pavements at Ambient Temperatures Using the Falling Weight Deflectometer
C. W. Manzione (author)
1988
336 pages
Report
No indication
English
Civil Engineering , Air Transportation , Asphalt , Concrete , Landing fields , Pavements , Surface temperature , Test and evaluation , Computations , Computer programs , Cores , Cracks , Creep tests , Elastic properties , Energy , Equations , Experimental data , Field tests , Flexible materials , Florida , Fracture(Mechanics) , Laboratory tests , Layers , Low temperature , Predictions , Resilience , Rheology , Sand , Static tests , Temperature , Theses , Viscosity , Deflectometer
Structural Evaluation of Airfield Rigid Pavements Using Falling Weight Deflectometer.
| Online Contents | 1993
Load Transfer Determination for Airfield Pavements Using the Falling Weight Deflectometer
| British Library Conference Proceedings | 1994
Dynamic analysis of falling weight deflectometer (FWD) tests on airfield pavements
| Tema Archive | 1997
Dynamic Analysis of Falling Weight Deflectometer (FWD) Tests on Airfield Pavements
| British Library Conference Proceedings | 1997
Falling Weight Deflectometer Configuration Standards for Airfield Testing
| British Library Conference Proceedings | 2002