ACTIVITIES OF AASHTO T-4, TECHNICAL COMMITTEE ON CONSTRUCTION Shoukry Elnahal, P.E., T-4 Chairman Vision and Mission Advance the state-of-the-art of bridge construction Develop and maintain the bridge construction specifications and technical guidance Identify research needs Guidance & Specification Objectives Review and recommend updates related to construction for the AASHTO LRFD Design and Construction Specifications. Develop and maintain AASHTO guidance documents related to bridge construction. Provide SCOBS leadership and guidance in advancing new bridge construction technologies, including research needs. Guidance & Specification Objectives Liaison with industry, academia, and TRB technical committees to advance technology used in bridge construction engineering. High-early-strength LWC in closure joints Grouted splice couplers Grouting voids in non-post-tensioned applications (evaluate specifications) Guidance & Specification Objectives Serve as the SCOBS focal point for ABC Coordinate with SCOBS committee chairs on bridge construction-related issues. Provide support in the review and comment of construction-related documents. Guidance & Specification Objectives Develop and present ballot and technical committee progress at SCOBS annual meeting forums and general session. Guidance & Specification Objectives Strategies Work with other committees to advance ABC specifications and guidance Coordinate issues with relevant committees (materials, construction) Review, evaluate, and promote ABC innovation recommendations to and through other SCOBS technical committees. Work with industry, gov’t, academia to promote emerging ABC technologies ABC Action Items Update NCHRP 20-07/Task 294 Report on Temporary Works and discuss during AASHTO’s 2013 annual meeting Update 3 draft ballot items for NCHRP 10-71, Web-only Document 173, Cast-in-Place Concrete Connections and coordinate with T-10 for cosponsorship with T-10 lead ABC Action Items NCHRP 12-74, Report 681, Development of a Precast Bent Cap System for Seismic Regions – coordination with T-3 as lead Work with SHRP2 team on R04 Product (Innovative Bridge Designs for Rapid Renewal ABC Action Items Coordinate with industry on appropriate use and curing / shrinkage of high-early-strength lightweight concrete in closure joints Monitor activity and research related to mechanical reinforcing connectors (e.g., grouted splice couplers) for use in plastic hinge region in high seismic zones Investigate the adequacy of existing specifications for grouting voids in non-post-tensioned applications Research Guidelines for PBES tolerances Dynamic effects of large-scale bridge moves for structure and temporary works Additional validated options for ABC connection details, especially in high seismic regions, with emphasis on long-term performance and constructability Research Ask TRB AFF10 to develop draft research need statement (RNS) on NCHRP 350 crash testing and durability of connections for prefabricated barriers, for T-4 consideration Develop draft NCHRP 20-05 synthesis needs paragraph on alternative materials for PBES connections Tolerances for prefabricated elements (research statement submitted 08/10/2012) Contact Me