Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2024. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ Evaluation of Superpave, Superpave 5, and Stone Matrix Asphalt https://rip.trb.org/View/2140132 Tue, 21 Mar 2023 10:30:52 GMT https://rip.trb.org/View/2140132 Development of a Refined Superpave Binder Purchase Specification https://rip.trb.org/View/2085721 Fri, 16 Dec 2022 14:15:16 GMT https://rip.trb.org/View/2085721 Analysis of Asphalt Mixtures Using Alternative Aggregate in SMA and Superpave https://rip.trb.org/View/1992149 Fri, 08 Jul 2022 15:58:26 GMT https://rip.trb.org/View/1992149 SPR-4514: Material Characterization and Determination of MEPDG Input Parameters for Indiana Superpave 5 Asphalt Mixtures https://rip.trb.org/View/1724641 Wed, 29 Jul 2020 11:30:22 GMT https://rip.trb.org/View/1724641 Superpave 5 Lab Mix Design Procedure https://rip.trb.org/View/1708235 30 million and 3 —30 million shall be considered. Binder shear modulus, phase angle, Bending Beam Rheometer (BBR) stiffness, etc. will be determined. The Dynamic Shear Rheometer (DSR) will be conducted at high temperature following the AASHTO M 320 standard. The binder will be aged using Rolling Thin Film Oven (RTFO) and Pressure Aging Vessel (PAV). Test data will be analyzed to determine the impacts of the properties of the binder on rutting and cracking. All Superpave5 and Superpave mixes shall be evaluated for further performance criteria, with the following testing conducted on both 4% and 5% laboratory air voids: • Permeability • Rut Resistance (Hamburg) • Tensile Strength Ratio (TSR) test - moisture damage • Volumetric comparison • Texas Overlay Test - reflective cracking • Beam Fatigue or Semi-Circular Bending (SCB) intermediate temperature bottom-up or top-down fatigue cracking • Thermal Stress Restrained Specimen Test (TSRST) - low temperature cracking resistance ]]> Fri, 22 May 2020 15:27:51 GMT https://rip.trb.org/View/1708235 Performance Evaluation of SP-9.5 and SP-12.5 Superpave Mixtures https://rip.trb.org/View/1704775 Tue, 05 May 2020 15:12:18 GMT https://rip.trb.org/View/1704775 NCHRP Implementation Support Program. Facilitating Balanced Mix Design Implementation https://rip.trb.org/View/1695723 Mon, 30 Mar 2020 17:03:35 GMT https://rip.trb.org/View/1695723 SPR-4211: Implementing the Superpave 5 Asphalt Mixture Design Method and Refining the INDOT Ndesign Table, Lift Thickness and Mixture Compactability https://rip.trb.org/View/1494140 Thu, 04 Jan 2018 10:17:03 GMT https://rip.trb.org/View/1494140 Research for AASHTO Standing Committee on Highways. Task 412. Adjustments to the Superpave Volumetric Mixture Design Procedure for Selecting Optimum Asphalt Content https://rip.trb.org/View/1491277 Mon, 11 Dec 2017 20:09:59 GMT https://rip.trb.org/View/1491277 Producing Bio-Modified Rubber (BMT) Asphalt; A Sustainable and Bio-Based Alternative for Petroleum-Based Asphalt https://rip.trb.org/View/1442173 Sun, 08 Jan 2017 10:26:20 GMT https://rip.trb.org/View/1442173 PPRC14 SPE 3.32: Support for Superpave Implementation https://rip.trb.org/View/1441810 Wed, 04 Jan 2017 10:53:10 GMT https://rip.trb.org/View/1441810 SPR-4152: Pavement Density Demonstration Project https://rip.trb.org/View/1435496 Tue, 22 Nov 2016 15:56:51 GMT https://rip.trb.org/View/1435496 Performance of Unbound Layers of a Flexible Pavement System During Aircraft Loading https://rip.trb.org/View/1360993 Wed, 15 Jul 2015 01:01:33 GMT https://rip.trb.org/View/1360993 Evaluation of Modified Performance Grade Binders in Thin Lift Maintenance Mixes, Surface Mix, and a Reflective Crack Relief Layer Mix https://rip.trb.org/View/1358414 Mon, 22 Jun 2015 01:01:00 GMT https://rip.trb.org/View/1358414 Implementation of the Asphalt Mixture Performance Tester (AMPT) for Superpave Validation https://rip.trb.org/View/1358413 Mon, 22 Jun 2015 01:00:58 GMT https://rip.trb.org/View/1358413