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/ Understanding Causes of Concrete Culvert Pipe Joint Separation https://rip.trb.org/View/2244263 Tue, 12 Sep 2023 12:02:44 GMT https://rip.trb.org/View/2244263 Stabilization of Expansive Soils using Geopolymers Prepared from Locally Available Resources https://rip.trb.org/View/1948956 Mon, 09 May 2022 10:46:52 GMT https://rip.trb.org/View/1948956 Design, Construction and Performance Monitoring of Stabilization of Expansive Soils and Cement https://rip.trb.org/View/1641391 Mon, 29 Jul 2019 17:21:25 GMT https://rip.trb.org/View/1641391 Representative Testing of Expansive Soil Treatment Technologies for Transportation Earthworks https://rip.trb.org/View/1487825 Mon, 06 Nov 2017 14:37:30 GMT https://rip.trb.org/View/1487825 The Influence of Subgrade Soils Susceptible to Shrink/Swell and/or Frost Heave on Pavement Performance https://rip.trb.org/View/1466752 Fri, 12 May 2017 09:46:24 GMT https://rip.trb.org/View/1466752