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Browse from hundreds of recorded presentations from ACI Conventions and other concrete industry events.

This Week's Featured Presentation

Actual Applications of 3D-Printing: Chapter 7 of the Emerging Technology Report
Presented by: Raissa Ferron, University of Texas at Austin

Presentation details

Additive Construction by Concrete Extrusion: An Update on the Emerging Technology Report (ACI Fall 2023, Boston, MA) This presentation highlights some case studies related to 3D-printing of cementitious mixtures and compares and contrasts commonalities among them and lessons learned. In additions, best practices related to soliciting case studies for ACI documents is presented.


Upcoming Presentation

March 18 - 24

Increasing the Seismic Moment Capacity of Concrete Columns and Walls Using EBR-FRP and FRP Anchors
Presented by: Enrique del Rey Castillo, University of Auckland

Presentation details

Anchorage of Flexural Externally Bonded FRP Strengthening Systems (ACI Fall 2023, Boston, MA) Existing reinforced concrete structures are frequently prone to severe damage and/or collapse as a result of the loads that the structure is expected to experience if it were to be subjected to large intensity earthquake shaking. ACI 440.2R 2017 recognizes using externally bonded fiber reinforced polymer (EBR-FRP) systems in combination with FRP anchors as one of the valid methods for seismic strengthening, but ACI 440.2R does not provide design guidance, other than broad statements and basic engineering judgment (e.g. ?Mn = Mu). A design method was proposed following several experiments, resulting in the moment capacity of the FRP strengthened columns being accurately calculated, although the deformation capacity could not be calculated using standard models and theories. A new tri-linear behavior model is proposed, and additional insight on the influence of the tension-compression cyclic loading, transverse reinforcement, using a bond breaking layer or quality of installation is included.

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