2115 - Long Term Pavement Performance Monitoring of Six LTPP SPS-10 Sections in Oklahoma with 3D Laser Imaging

The use of warm mix asphalt (WMA) technology, which is defined as an asphalt concrete paving material produced and placed at temperatures approximately 500F cooler than those used for hot mix asphalt (HMA), offers significant benefits, notably, lower energy demand during production and construction, reduced emissions at the plant and the paver, and increased allowable haul distances. As a result, WMA for asphalt pavement construction has dramatically increased in the United States over the past decade. At least 30 state departments of transportation (DOTs) have established specification permitting the use of WMA.The Long Term Pavement Performance (LTPP) Program of Federal Highway Administration (FHWA) recently initiated a new Specific Pavement Study (SPS) to evaluate the long term performance of WMA mixtures. Under the SPS-10 experiment initiative (“Warm Mix Asphalt Overlay of Asphalt Pavement Study”), the Oklahoma Department of Transportation (ODOT) will construct six LTPP SPS-10 experimental sections on State Highway 66 from 5.95 miles east of US81, extending 4.08 miles to Garth Books Blvd. in Yukon. This new experiment will be the testing bed for this proposed study to evaluate the long-term field performance of WMA. This proposed project requests the application of state-of-the-art PaveVision3D technology along with other advanced OSU instruments and software tools for data collection and subsequently surface characterization and performance evaluation of the ODOT SPS-10 WMA pavement sites on SH66. The goal of this study is to evaluate the long term field performance of WMA, and to reduce the current knowledge gap of the long term performance between WMA and HMA. The objectives of this study are to (1) perform data collection and evaluation of pavement surface characteristics and performance (including cracking, rutting, roughness, texture, friction, and hydroplaning) for five years using the OSU 1mm 3D technology and other instruments (a grip tester for friction, dynamic friction tester (DFT) for dynamic friction, and a ultra-high resolution portable LS-40 3D Surface Analyzer for pavement micro-texture), and (2) understand the short-term and long-term performance of WMA.