Synthesis and evaluation of lightweight concrete research relevant to the AASHTO LRFD bridge design specifications : identification of articles for further evaluation and potential revision.

2012Final report.PDFManuscriptFHWA-HRT-13-029;NTIS PB2013-102358Bridge designLightweight concreteMix designSpecificationsResearchBridges--Design and construction--SpecificationsLightweight concreteUnited StatesUnited States. Federal Highway Administration. Office of Infrastructure Research and DevelopmentGreene, GaryGraybeal, Benjamin A.United States. Federal Highway Administration. Office of Infrastructure Research and DevelopmentNTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and StructuresNTL-HIGHWAY/ROAD TRANSPORTATION-DesignFederal Highway AdministrationMuch of the fundamental basis for the current lightweight concrete provisions in the AASHTO LRFD BridgeDesign Specifications is based on research of lightweight concrete (LWC) from the 1960s. The LWC that waspart of this research used traditional mixes of coarse aggregate, fine aggregate, portland cement, and water.Broad-based advancement in concrete technology over the past 50 years has given rise to significantadvancements in concrete mechanical and durability performance. The purpose of this document is to givemembers of AASHTO Subcommittee on Bridges and Structures T-10 the opportunity to begin consideringwhether revisions to provisions related to LWC within Chapter 5 of the AASHTO LRFD Specifications arewarranted. Five specific topics are described in this document where recent LWC research may be sufficient towarrant consideration of a revision to the AASHTO LRFD Specifications. For each topic, the current articles inAASHTO LRFD are described, some of the recent research efforts are mentioned, and then potential revisionsare outlined. This document served as supplemental information in support of the discussion that occurred at theMarch 2012 T-10 meeting in Chicago, Illinois