Webinar: Durable Bonded Post-Tensioning-Webinar: Durable Bonded Post-Tensioning

Video Transcription

Video Summary

In October's webinar by the Post-Tensioning Institute, Kyle Boyd introduced the session focused on durable bonded post-tensioning, particularly in bridge construction. The discussion highlighted improvements in post-tensioning systems to enhance performance and durability. Bob Swart from Structural Technologies detailed past issues related to poor grouting practices and material choices that led to corrosion and structural failures. The presentation addressed how industry stakeholders, including PTI and ASPE, collaborated to improve post-tensioning systems through specifications, better materials like prepackaged grout, and advanced equipment such as colloidal mixers.<br /><br />The introduction of protection levels (PL1 to PL3), advancements in anchorage and duct systems, and testing measures were discussed. Training programs for installers and inspectors were emphasized as key improvements, ensuring that grouting and installation procedures are properly executed. The session also considered new technologies, such as epoxy-coated strands and flexible fillers. The audience was informed about upcoming PTI webinars focusing on PT slab-on-ground fundamentals, structural aspects, and the impact of electric vehicle weights on parking structures, scheduled for the upcoming months.

Keywords

post-tensioning

bridge construction

durability

corrosion prevention

grouting practices

construction materials

structural technologies

training programs

new technologies