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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 348 Abstracts search results

Document: 

CI4806Suthar

Date: 

June 1, 2026

Author(s):

Deepak Suthar, Akanshu Sharma, and Taylor Marchment

Publication:

Concrete International

Volume:

48

Issue:

6

Abstract:

Spray-based 3D-printed concrete (3DPC) is gaining popularity due to its ability to realize complex geometries, optimize materials, and reduce labor and construction costs. Anchorages are widely used in concrete to connect structural or non-structural elements to the concrete. However, there are currently no tests that evaluate the behavior of anchorages in 3DPC. In this pilot study, steps were taken to assess the behavior and performance of anchorages in 3DPC.

DOI:

10.14359/51751763

Document: 

CI4804Hörmann-Gast2

Date: 

April 1, 2026

Author(s):

Andra Hörmann-Gast and Tara C. Hutchinson

Publication:

Concrete International

Volume:

48

Issue:

4

Abstract:

In the most recent updates to the ACI 355 prequalification standards, changes were made to the requirements for testing and assessment of anchors intended for use in seismic design environments (SDC C through F). These changes are reflected in ACI CODE-355.2-24 and ACI CODE-355.4-24. Both standards are referenced in ACI CODE-318-25, “Building Code for Structural Concrete—Code Requirements and Commentary.” This article provides background for these changes, including a historical perspective on seismic qualification and design of anchorage, supporting research, and ACI Committee 355 decisions.

DOI:

10.14359/51750637

Document: 

CI4605Sicaras

Date: 

May 1, 2024

Author(s):

Victoria K. Sicaras

Publication:

Concrete International

Volume:

46

Issue:

5

Abstract:

New research funded by the ACI Foundation developed and tested retrofit techniques for diaphragms using externally bonded fiber-reinforced polymer (FRP). Key findings from the research are being translated into guidance on how to establish the effective FRP design strain and the nominal shear strength contribution of the FRP. The recommendations also address the use of intermediate and end FRP anchors and limitations on the clear spacing between sheets

DOI:

10.14359/51740754

Document: 

SP-360_40

Date: 

March 1, 2024

Author(s):

Lin S-H, Kim I, Borwankar A, Kanitkar R, Hagen G, Shapack G

Publication:

Symposium Papers

Volume:

360

Abstract:

Fiber reinforced polymers (FRP) are commonly used to seismically retrofit concrete structural walls. Limited design guidance for the seismic application of FRP strengthening is currently available to designers in guidelines such as ACI PRC-440.2-17 or standards like ASCE/SEI 41-17. This paper presents the description and results of an experimental effort to investigate the effectiveness of FRP retrofitted concrete walls. The specimen wall thickness was either 6 in or 12 in, which represents a typical range of wall thickness seen in older buildings. To better reflect the most common applications seen in the industry, the walls were retrofitted with FRP, and anchored with fiber anchors only on one side of the wall. The study demonstrates that the effectiveness of FRP is reduced as the wall thickness increases and that the FRP must be anchored to the wall for any tangible benefit. The results are used to assess the current provisions in ACI PRC-440.2-17 and ASCE/SEI 41-17. It is apparent that additional testing is required to better understand the complexities involved in the FRP strengthening of shear walls and such testing is scheduled for the near future.

DOI:

10.14359/51740652

Document: 

SP-360_09

Date: 

March 1, 2024

Author(s):

Juan Torres Acosta and Douglas Tomlinson

Publication:

Symposium Papers

Volume:

360

Abstract:

Three bridge barriers were tested under pseudo-static loading to assess the effectiveness of a dowelling repair technique for restoring the capacity of damaged glass fiber-reinforced polymer (GFRP) reinforced systems. Barriers were 1500 mm (59.1 in.) wide and tested with an overhang of 1500 mm (59.1 in.). One barrier was entirely reinforced with steel reinforcement with the layout and geometry common in Alberta, Canada for highway applications. A second barrier replaced all steel reinforcement with GFRP bars. The third barrier simulates repair where the barrier is damaged and needs to be replaced by removing the barrier, drilling holes, and using epoxy to dowel GFRP bars into the deck. All barriers failed by concrete splitting at the barrier/deck interface which is attributed to the complex interaction of stresses from the barrier wall and overhang. The steel reinforced barrier was strongest but had slightly lower energy dissipation than the GFRP reinforced barriers. The repaired GFRP reinforced barrier had very similar response to the baseline GFRP reinforced barrier but reached a slightly larger capacity. Previously completed finite element models showed similar general responses and failure modes but larger stiffnesses and strengths than the tests which requires further investigation.

DOI:

10.14359/51740621

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