Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Multi-laboratory validation study on resilient modulus of asphalt concrete using SHRP LG Device
The Strategic Highway Research Program (SHRP) Load Guide (LG) Device was developed as a part of the Strategic Highway Research Program's Long—Term Pavement Performance project. This device was recommended by the National Co-operative Highway Research Program (NCHRP) Project 1–28 as the most promising testing equipment after extensive comparisons among conventional testing equipments. Also, the NCHRP Project 1–28 proposed a new resilient modulus testing procedure of asphalt concrete using the SHRP LG Device. However, the feasibility of a new testing procedure using the SHRP LG Device should be proved by other testing agencies in order to be accepted as a standardized method. In addition, the test results should be reproduced with ease by investigators. Based on these backgrounds in mind, the resilient modulus test of asphalt concrete was conducted by two laboratories.
The resilient modulus test results demonstrated that the moduli values determined from the calculated Poisson's ratio showed greater difference between the laboratories than those from the assumed Poisson's ratio. In particular, when the calculated Poisson's ratios were used in computation, the moduli values from North Carolina Department of Transportation (NCDOT) were always higher than those from North Carolina State University (NCSU). Based on these two observations, assumed Poisson's ratios may become a better choice for more consistent moduli in order to minimize the operator-to-operator variation. Also, the graphical comparison and statistical analysis results obviously demonstrated the possible effect of operator-to-operator variation. The effect of tested versus untested specimens on resilient moduli values was negligible within the given size of experiment, which could be attributed to the reduction of load levels proposed as a result of NCHRP Project 1–28.
Multi-laboratory validation study on resilient modulus of asphalt concrete using SHRP LG Device
The Strategic Highway Research Program (SHRP) Load Guide (LG) Device was developed as a part of the Strategic Highway Research Program's Long—Term Pavement Performance project. This device was recommended by the National Co-operative Highway Research Program (NCHRP) Project 1–28 as the most promising testing equipment after extensive comparisons among conventional testing equipments. Also, the NCHRP Project 1–28 proposed a new resilient modulus testing procedure of asphalt concrete using the SHRP LG Device. However, the feasibility of a new testing procedure using the SHRP LG Device should be proved by other testing agencies in order to be accepted as a standardized method. In addition, the test results should be reproduced with ease by investigators. Based on these backgrounds in mind, the resilient modulus test of asphalt concrete was conducted by two laboratories.
The resilient modulus test results demonstrated that the moduli values determined from the calculated Poisson's ratio showed greater difference between the laboratories than those from the assumed Poisson's ratio. In particular, when the calculated Poisson's ratios were used in computation, the moduli values from North Carolina Department of Transportation (NCDOT) were always higher than those from North Carolina State University (NCSU). Based on these two observations, assumed Poisson's ratios may become a better choice for more consistent moduli in order to minimize the operator-to-operator variation. Also, the graphical comparison and statistical analysis results obviously demonstrated the possible effect of operator-to-operator variation. The effect of tested versus untested specimens on resilient moduli values was negligible within the given size of experiment, which could be attributed to the reduction of load levels proposed as a result of NCHRP Project 1–28.
Multi-laboratory validation study on resilient modulus of asphalt concrete using SHRP LG Device
KSCE J Civ Eng
Kim, Nakseok (Autor:in)
KSCE Journal of Civil Engineering ; 3 ; 47-55
01.03.1999
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Resilient Modulus of Asphalt Concrete
| NTIS | 1992
Validation in the SHRP asphalt research program (October 1991)
| UB Braunschweig | 1990
| British Library Conference Proceedings | 1992