30建筑相关,美国土木.pdf

ICCTP 2009: Critical Issues in Transportation Systems Planning, Development, and Management ©2009 ASCE 2611 Laboratory Investigation of Reclaimed Asphalt Pavement Mixed with Pure Binder Using X-ray CT Scanner 1 2 3 Cristian Druta , Linbing Wang , and Tulong Zhu 1Virginia Tech Transportation Institute, Virginia Polytechnic Institute and State University, VTTI 2001A, Blacksburg, VA; Ph (540) 23 1-1056; Fax (540) 231-1555; email: cdruta1@ 2The Via Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, 301N Patton Hall, Blacksburg, VA; Ph (540) 231- 5262; Fax (540) 231-7532; email: wangl@ 3Department of Mechanical Engineering, School of Engineering, Widener University, One University Place, Chester, PA; Ph (610) 499-404 1; Fax (610) 499-4059; email: tzhu@ ABSTRACT The use of reclaimed asphalt pavement (RAP) has proven to be economical and environmentally safe as being used extensively to produce new asphalt pavements. To examine the “black rock” problem of RAP material, a laboratory investigation was conducted in this study in which the blending process of simulated and actual RAP material with virgin binder was analyzed using an x-ray scanner. For this purpose, new aggregate was mixed with virgin binder containing 25% metal powder (by weight) at 4.5% asphalt content, and then the mixture was oven a