Guidelines for the Use of Ultra-High-Performance Concrete (UHPC) in Precast and Prestressed Concrete-UHPC Webinar

Video Transcription

Video Summary

The video is a webinar presentation titled "Guidelines for the Use of Ultra-High Performance Concrete, UHPC, in Precast and Pre-Stressed Concrete." The presenter, John Lawler, discusses the guidelines developed by PCI's Concrete Materials Technology Committee for the use of UHPC in precast and pre-stressed concrete. He explains the origins of the guidelines and the research project funded by PCI to develop UHPC mixtures for structural applications. Lawler discusses the materials and mixture proportioning for UHPC, including the selection of materials such as cement, silica fume, supplemental materials, sand, fibers, and superplasticizers. He explains the particle packing concept and the importance of optimizing the mixture for performance. Lawler also covers the production process for UHPC, including batching and mixing, fiber addition, placement techniques, and curing methods. He discusses the testing and qualification of UHPC, including compressive strength, flexural strength, and durability tests. Lawler also mentions the guide specification for UHPC, which provides guidance for materials qualification, fabrication, and acceptance testing. He concludes by highlighting the successes of participating precasters in producing UHPC and meeting the design targets.

Keywords

Ultra-High Performance Concrete

UHPC

Precast Concrete

Pre-Stressed Concrete

Concrete Materials Technology Committee

Mixture Proportioning

Particle Packing Concept

Production Process

Testing and Qualification