Translated Articles

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Translated Articles

Volunteers from ACI’s international chapters and international partner associations have translated CI articles into several languages. This activity helps advance the mission of ACI by further disseminating knowledge of concrete technology around the world.

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Showing 16-20 of 260 search results

Understanding the Mysterious Overstrength of Post-Tensioned Flexural Members

Precompression is included in service stress analyses of post-tensioned (PT) members but is ignored in flexural strength calculations. With the goal of reassuring practicing engineers that restraint cracking should not be a concern with respect to flexural strength, the authors explain why PT flexural members have significantly greater capacity than predicted by typical calculations.

Available in the following language(s): Spanish

Tech Spotlight: Zigzags for Greener Construction

An Architecture PhD Student at Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland, has developed a lightweight, foldable, and reusable formwork system for vaulted floors. Known as Unfold Form, this system is easy to fabricate, transport, and use.

Available in the following language(s): Spanish

The Shotcrete Advantage: Enhancing Access, Efficiency, and Safety in Geohazard Mitigation

In July 2024, GeoStabilization International used shotcrete for the construction of a soil nail wall for a large data center in Atlanta, GA, USA. To enhance efficiency, GeoStabilization implemented innovative techniques, including the use of a shotcrete robot. This proved especially effective during the installation of the initial structural layer of the wall.

Available in the following language(s): Spanish

Concrete Q&A: Coefficient of Friction for Not Intentionally Roughened Contact Surface and Verifying Compliance Requirements for Intentional Roughening per Table 22.9.4.2 in ACI CODE-318

This month’s Q&A discusses changes in ACI CODE-318-25 for coefficient of friction for concrete placed against hardened concrete that is clean, free of laitance, and not intentionally roughened, as well as new provisions for determining if an intentionally roughened surface meets the 1/4 in. roughness specified in Table 22.9.4.2.

Available in the following language(s): Spanish

Thoughts Concerning Post-Tensioning Elongation Records

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.

Available in the following language(s): Spanish

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