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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Q: Last winter, we placed concrete grade beams for an industrial building. A technician from the owner’s testing agency took test cylinders but left them unprotected in the cold weather for a week. At 28 days, the average cylinder compressive strength was 2750 psi. Because this was far below the specified fc of 6000 psi, the engineer required three cores to be taken to evaluate the in-place concrete strength. The individual core compressive strengths were 4940, 4970, and 5370 psi, resulting in an average strength of 5090 psi (84.8% of fc). The engineer rejected the concrete on the basis that the ACI 318-19 Code1 requires the average core strength to equal 85% of the specified strength. In this case, 0.85 fc = 5100 psi, so isn’t the average core strength of 5090 psi close enough?

Available in the following language(s): Spanish


The American Concrete Institute showcases the contributions and efforts of its global membership and the concrete industry worldwide through its varied honors and awards program.

Available in the following language(s): Spanish


The nominee for ACI President in 2021-2022 is Cary S. Kopczynski, CEO and Senior Principal of Cary Kopczynski & Company, Seattle, WA, USA. If elected during membership balloting, he will serve a 1-year term as ACI President that begins at the conclusion of the ACI Concrete Convention Spring 2021 and ends at the conclusion of the ACI Convention Spring 2022

Available in the following language(s): Spanish


ACI Committee 133, Disaster Reconnaissance, was established in 2013 to deploy teams to investigate damage from natural disasters. Critical lessons learned from the information gathered through deployments is reported to ACI’s technical committees and membership. To date, an ACI team has been deployed to investigate damage resulting from five earthquakes, one bridge collapse, and one wildfire. This article provides descriptions of these investigations, including references to reconnaissance reports and collected data.

Available in the following language(s): Spanish


Applying ACI 318: Can I use ACI 318 to design slabs-on-ground? Minimum Reinforcement: What is the minimum reinforcement required for slabs-on-ground? Hard Troweling and Air Content: Can concrete with a total air content exceeding 3% be hard troweled successfully? Exposure Conditions: What can be done to protect slabs-on-ground that will be subject to various exposure conditions as defined in ACI 318?

Available in the following language(s): Spanish

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