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/ Testing Sand-Lightweight Concrete Bridge Deck Members Reinforced with Glass FRP Bars: Phase I https://rip.trb.org/View/2652545 Tue, 13 Jan 2026 15:59:44 GMT https://rip.trb.org/View/2652545 Lightweight, Durable, and Cost-Effective: Advancing Voided Concrete Technology with Engineered Cementitious Composites https://rip.trb.org/View/2646966 Tue, 06 Jan 2026 17:19:21 GMT https://rip.trb.org/View/2646966 Durability of Lightweight Concrete Bridge Decks https://rip.trb.org/View/2270035 Tue, 17 Oct 2023 18:43:07 GMT https://rip.trb.org/View/2270035 Use of All Lightweight Concrete in Conjunction with UHPC Connection for Prefabricated Barrier System https://rip.trb.org/View/1833699 Mon, 08 Mar 2021 17:23:20 GMT https://rip.trb.org/View/1833699 Behavior of Reinforced and Unreinforced Lightweight Cellular Concrete for Retaining Walls https://rip.trb.org/View/1632304 Sun, 30 Jun 2019 15:00:11 GMT https://rip.trb.org/View/1632304 Lightweight Concrete Modification Factor for Shear Friction https://rip.trb.org/View/1286101 Thu, 16 Jan 2014 01:00:24 GMT https://rip.trb.org/View/1286101 Lightweight Concrete Code Provisions https://rip.trb.org/View/1230548 Thu, 03 Jan 2013 14:02:00 GMT https://rip.trb.org/View/1230548