This paper’s purpose is to provide an update on the pavement condition of MnROAD’s three low volume road (LVR) Superpave test cells constructed in 1999 with different asphalt binders, see table below. These cells were built to field validate the current low temperature performance grading (PG) system currently being used at Mn/DOT and many other agencies around the world. The paper will document the mix designs, laboratory testing, forensics, environmental conditions, and the resulting distresses observed include rutting, transverse cracking, fatigue cracking and how they are affecting pavement performance and ride.
The purpose of this report is to document the reconstruction process and to provide background information about the historical performance and subsequent deterioration of Cell 26 that lead up to the reconstruction. Cell 26 extends from Station 170 + 75 to Station 174 + 65 on the LVR. The cell, one of eleven LVR HMA test cells, was originally designed to be a 6? full depth hot mix asphalt cell. The HMA had a Marshall Hammer design of 50 blows and uses an AC 120/150 penetration grade asphalt binder. Laboratory testing has shown that the 120/150 asphalt binder used at MnROAD has a Performance Grade (PG) of 58-28.
