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The Rob and Melani Walton Center for Planetary Health at Arizona State University, Tempe, AZ, USA, rises from a triangular lot like a giant cracked-open geode. Clad in a shell of glass fiber-reinforced concrete (GFRC), the building’s paneled façade is based on biomimicry of a saguaro cactus’ orientation to the sun.
Available in the following language(s): Spanish
Relevant test data for a comprehensive study of factors influencing bond-splitting behavior was identified from literature review. Based on this review, a database of 79 column and beam tests was compiled and studied to develop an alternative provision for bond splitting that was adopted in Section 18.7.4.3 of ACI CODE-318-25. The article summarizes the details of this study.
Available in the following language(s): Spanish
This month’s Q&A is a follow up to the February 2025 Q&A. It discusses changes in core conditioning requirements in ACI CODE-318 and ASTMC42/C42M that took place within the last 25 years and research findings that led to these changes. It also explains whether standard moisture conditioning requirements could be changed on some projects.
Available in the following language(s): Spanish
Internally cured concrete was used to repair bridge decks of the Wilson Dam in Muscle Shoals, AL, USA, and to provide a 100-year service life. The article discusses characteristics of internally cured concrete and the benefits of using it, as well as lightweight aggregates needed to produce such concrete and their properties.
Available in the following language(s): Spanish
This article discusses differences between ordinary portland cement (Type I/II) and portland-limestone cement (Type IL) concrete based on direct observations and reports from concrete finishers. Developing an understanding of how these two concrete types differ from each other can help contractors modify and adapt finishing practices to avoid possible issues during placement.
Available in the following language(s): Spanish