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The article discusses research performed by the Joint Transportation Research Program in West Lafayette, IN, USA. The study concluded that nano-titanium dioxide and two forms of colloidal nanosilica can accelerate the early-age hydration process of cementitious pastes, particularly those containing fly ash and cured at low temperatures; however, an excess of nanoparticles may reduce the scaling resistance of concrete.
Available in the following language(s): Spanish
New research funded by the ACI Foundation developed and tested retrofit techniques for diaphragms using externally bonded fiber-reinforced polymer (FRP). Key findings from the research are being translated into guidance on how to establish the effective FRP design strain and the nominal shear strength contribution of the FRP. The recommendations also address the use of intermediate and end FRP anchors and limitations on the clear spacing between sheets
Available in the following language(s): Spanish
The Slag Cement Association (SCA) announced the recipients of its 2023 Slag Cement in Sustainable Concrete Awards program. These awards were unveiled during the ACI Concrete Convention – Spring 2024 in New Orleans, LA, USA.
Available in the following language(s): Spanish
This month's Q&A discusses existing protocols for determination of a need for shoring of structures during repair, minimum information required for delegation of a shoring design to a contractor for bidding and construction, as well as responsibilities of an engineer of record when reviewing a delegated shoring design submitted by the contractor.
Available in the following language(s): Spanish
The ACI Excellence in Concrete Construction Awards program is entering its 10th year. Due to the tremendous increase of nominations in the Infrastructure Category, the International Project Awards Committee has introduced a separate Bridges Category for 2024. There are now eight categories to choose from.
Available in the following language(s): Spanish