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International Concrete Abstracts Portal

The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

Showing 1-5 of 315 Abstracts search results

Document: 

CI4804Parra-Montesinos

Date: 

April 1, 2026

Author(s):

Gustavo J. Parra-Montesinos, Sergio M. Alcocer, Martin A. Cuadra, and Rashid Ahmed

Publication:

Concrete International

Volume:

48

Issue:

4

Abstract:

ACI CODE-318-25 provisions for calculating horizontal joint shear force in beam-column joints of structures assigned to Seismic Design Category (SDC) A and B generally assume moment transfer to the joint is governed by the nominal flexural strength of the beam(s). There are cases, however, where moment transfer is governed by column flexural yielding or where both the beams and columns framing into the joint are expected to remain elastic. Examples can be found in roof joints and in joints with post-tensioned beams whose design is governed by serviceability conditions. Guidance is provided herein for determining horizontal shear force in joints where moment transfer is not governed by beam flexural yielding through an example roof joint between a cast-in-place post-tensioned beam and a reinforced concrete column.

DOI:

10.14359/51750641

Document: 

CI4802PTIAwards

Date: 

February 1, 2026

Publication:

Concrete International

Volume:

48

Issue:

2

Abstract:

The 2025 Post-Tensioning Institute (PTI) Project Awards recognized projects that demonstrate innovation, complexity, cost effectiveness, and aesthetics in post-tensioned (PT) concrete design and construction. The 2025 Project of the Year Award was bestowed to One River North, in Denver, CO, USA.

DOI:

10.14359/51749507

Document: 

CI4706Allred

Date: 

June 1, 2025

Author(s):

Bryan Allred, Frank Malits, and Neel Khosa

Publication:

Concrete International

Volume:

47

Issue:

6

Abstract:

For all concrete structures, cost effectiveness is heavily influenced by the timing of formwork cycling. For post-tensioned structures, review and approval of elongation records is a critical step within each formwork cycle. This article explores the timeliness of reviews, purpose of elongations and tolerances, evaluation of stressing records, and reasonable expectations for all stakeholders.

DOI:

10.14359/51747830

Document: 

CI4607Reigstad

Date: 

July 1, 2024

Author(s):

Gordon H. Reigstad, Jason G. Reigstad, and Jared M. Reigstad

Publication:

Concrete International

Volume:

46

Issue:

7

Abstract:

The PS=Ø system allows engineers to design post-tensioned (PT) and reinforced concrete members with more restraint releases and without the construction schedule delays of traditional pour strips. With or without temporary PT stressing strips, PS=Ø couplers can be used as restraint relief details in slab-to-slab, slab-to-wall, and beam-to-beam joints.

DOI:

10.14359/51740981

Document: 

CI4604Britt_spotlight

Date: 

April 1, 2024

Author(s):

Jennifer Britt

Publication:

Concrete International

Volume:

46

Issue:

4

Abstract:

Existing concrete slabs and structures require scanning and imaging before any build out, renovation, or excavation work begins. Ground-penetrating radar technology has established itself as the primary tool for fast, effective, and efficient determination of the presence of utilities and embedded structural members, such as post-tensioning tendons and reinforcing bars.

DOI:

10.14359/51740722

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