Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2026. 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/ SPR-5027: Evaluation of Recycled Concrete Pavement (RCP) for Base and Subbase Layers https://rip.trb.org/View/2698666 Wed, 06 May 2026 15:26:33 GMT https://rip.trb.org/View/2698666 Evaluation of Processes Glass Aggregate for Utilization in Transportation Projects as a Sand Borrow (2.12) https://rip.trb.org/View/1875943 Thu, 14 Jul 2022 11:49:52 GMT https://rip.trb.org/View/1875943 Reclaimed Stabilized Base – Stabilizing Agent Selection & Design https://rip.trb.org/View/1663535 Mon, 04 Nov 2019 09:50:14 GMT https://rip.trb.org/View/1663535 Soil-Recycled Aggregate-Geopolymer Road Base/Subbase Mixtures - Step Towards Sustainability https://rip.trb.org/View/1505427 Fri, 23 Mar 2018 16:47:59 GMT https://rip.trb.org/View/1505427 Using Electrical Density Gauges for Field Compaction Control https://rip.trb.org/View/1229828 Thu, 03 Jan 2013 13:49:19 GMT https://rip.trb.org/View/1229828