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 130 Abstracts search results

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.


Document: 

CI4701Zhang

Date: 

January 1, 2025

Author(s):

Leo (Lingfeng) Zhang, Mike Hernandez, James Dare, Mack Kowalski, and Ezra Che

Publication:

Concrete International

Volume:

47

Issue:

1

Abstract:

This article covers a study designed to revisit an ongoing debate regarding the use of three-dimensional (3-D) laser scanners for evaluating concrete construction tolerances. Scanner hardware and software as well as general practices continue to evolve, so how has this progress affected the accuracy of scan measurements?


Document: 

CI4607Klinger

Date: 

July 1, 2024

Author(s):

James E. Klinger, Eamonn F. Connolly, Charles D. Charlson, Oscar R. Antommattei, and Bruce A. Suprenant

Publication:

Concrete International

Volume:

46

Issue:

7

Abstract:

Various codes, specifications, and reports provide different requirements/recommendations for anchor bolt (rod) installation in foundations. The article discusses the issues related to these requirements/recommendations and encourages designers to add 2 in. (50 mm) to the calculated design embedment length and to specify the elevation of the top of the anchor bolt.


Document: 

CI4509Zhang

Date: 

September 1, 2023

Author(s):

Lingfeng (Leo) Zhang and John M. Russo

Publication:

Concrete International

Volume:

45

Issue:

9

Abstract:

The method and apparatus used to verify concrete tolerances should be capable of reliably measuring to the specified tolerance or less. The purpose of this article is to provide users with an in-depth review of the data comparison from a live laser scanning event at Geo Week 2023, as well as to help users in selecting a proper laser scanner for concrete tolerance verification.


Document: 

CI4503Q&A

Date: 

March 1, 2023

Author(s):

Bruce A. Suprenant and Jim Klinger

Publication:

Concrete International

Volume:

45

Issue:

3

Abstract:

This month’s Q&A discusses a disagreement between a subcontractor and a general contractor (GC) on tolerances governing concrete work on the project. While the subcontractor believes that 1 in. tolerances in ACI 117-10(15) for horizontal deviations for edge-of-slab location and column location apply, the GC insists on a zero-tolerance condition illustrated in a detail drawing.


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