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Chlorides in sufficient amounts contribute to the corrosion of reinforcing steel in concrete. However, there is no singular critical chloride threshold that covers every case. The industry’s understanding of the role of chlorides that may initiate corrosion is evolving. This article discusses various parameters affecting the critical chloride threshold and the sources of uncertainty associated with the concept.
Available in the following language(s): Spanish
The contractor who is responsible for the site, typically the general or prime contractor, is responsible for: 1) secure location; 2) water sources; and 3) electrical power. The contractor requirement to meet ACI SPEC-301-20 requirements is supported by ACI PRC-132-2. ACI PRC-132-24 states the “testing agency has the responsibility to provide the means and methods for initial curing unless that responsibility has been assigned to another party in the contract documents.”
Available in the following language(s): Spanish
The construction industry faces a key challenge: delivering consistency and public trust while building faster and more efficiently than ever before. This challenge is especially clear in concrete construction, thefoundation of modern infrastructure. ACI Certification programs play a vital role in addressing this challenge.
Available in the following language(s): Spanish
For their outstanding achievements and service to the Institute, ACI recognized selected members at the ACI Concrete Convention – Spring 2026 in Rosemont/Chicago, IL, USA. Five individuals were granted Honorary Membership, ACI’s highest honor.
Available in the following language(s): Spanish
Construction issues attributed to Type IL cement have included reduced bleeding and extended setting time, which can lead to surface scaling. These issues are not necessarily due to the use of Type IL cement. Commonly used SCMs, slag cement, excessive entrained air, or finely ground Type I/II cement can also reduce bleeding and lead to scaling. This article focuses on how petrographic examination can help determine the probable causes of scaling in exterior flatwork.
Available in the following language(s): Spanish