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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 8 Abstracts search results

Document: 

CI4802Klinger

Date: 

February 1, 2026

Author(s):

James Klinger, Jeremiah Mistele, Frank Salzano, Eamonn F. Connolly, and Bruce A. Suprenant

Publication:

Concrete International

Volume:

48

Issue:

2

Abstract:

In this article, information is provided regarding top-of-column tolerances and their impacts on constructability and productivity. The authors recommend that key ACI committees provide guidance on top-of-column tolerance specifications.

DOI:

10.14359/51749509

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: 

SP-355_15

Date: 

July 1, 2022

Author(s):

Johann Plank, Lei Lei

Publication:

Symposium Papers

Volume:

355

Abstract:

Polycarboxylates (PCEs) currently dominate the global superplasticizer market. Among them, HPEG and IPEG PCEs have attained a prominent position as they present the most cost-effective PCEs known at present. Recently, novel vinyl ether PCEs designated as EPEG and GPEG PCEs were introduced, thus broadening the family of VPEG PCEs, and their overall performance is still evaluated. Well documented are now the advantages of novel phosphated comb polymers which can significantly reduce the stickiness of concrete e.g. in UHPC. In spite of many attempts, so far no overall cost-effective clay tolerant superplasticizer has been identified, the challenge being that such a structure must include side chains that however do not contain polyethylene glycol/polypropylene glycol (PEG/PPG) or polyamines. Fortunately, for calcined clay blended cements, HPEG PCEs of specific molecular design as well as zwitterionic (amphoteric) PCEs have proven to be highly effective. Moreover, AAS binder systems were successfully fluidized with APEG or HPEG PCEs exhibiting particularly short side chains (nEO < 10). This review underlines the critical role that innovation in chemical admixtures will play in the future to facilitate a successful migration to low-carbon binders.

DOI:

10.14359/51736021

Document: 

CI4407DestreeMobasher

Date: 

July 1, 2022

Author(s):

Xavier Destrée and Barzin Mobasher

Publication:

Concrete International

Volume:

44

Issue:

7

Abstract:

The authors discuss an article by J.L. Silfwerbrand, “Industrial Fiber Concrete Floors,” published in the May 2021 issue of CI. Focusing on Belgian/Continental and Swedish approaches to the design of steel fiber-reinforced concrete slabs, the article presents an alternative perspective based on recent publications and latest developments in design and testing.

DOI:

10.14359/51735985

Document: 

CI4309Q&A

Date: 

September 1, 2021

Author(s):

Jim Klinger

Publication:

Concrete International

Volume:

43

Issue:

9

Abstract:

Q. I’m working on a project that requires my team to place concrete on various substrates prepared by other subcontractors. What should I focus on when accepting these substrates to avoid any unnecessary issues?

DOI:

10.14359/51734161

12

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