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An improvement project on a 23-mile (37 km) section of Interstate 17 (I-17) in Arizona, USA, includes widening of 15 miles (24 km) of roadways, replacing two bridges, widening of 10 additional bridges, and constructing 8 miles (13 km) of flex lanes. PERI USA provided customized and fully rentable formwork/falsework for concrete construction on this project.
Available in the following language(s): Spanish
Concrete columns are traditionally produced by placing concrete into a mold or form. Assembling and then removing the formwork takes time and labor; and eventual replacement of the formwork leads to increased material use and transport costs. A new alternative, a permanent three-dimensionally (3-D) printed concrete form in which a core is cast with self-consolidating concrete, was investigated in this project.
Available in the following language(s): Spanish
This article, the fourth in a five-part series on calculating deflections using a new expression for the effective moment of inertia Ie introduced into ACI CODE-318-19, provides a deflection example. The example follows the procedure outlined in Part 1 to compute the deflection of reinforced concrete (nonprestressed) one-way slab with both ends continuous.
Available in the following language(s): Spanish
The ACI Officers and Board of Direction Members for 2025-2026 were announced, including ACI President Maria Juenger, ACI Vice President Matthew R. Sherman, and four new Directors elected by the ACI membership. These designations took effect at the conclusion of the Spring 2025 ACI Board of Direction meeting.
Available in the following language(s): Spanish
This month’s Q&A discusses minimum requirements for performing, implementing, and documenting service life predictions on new construction projects per ACI CODE-365-24. It outlines the service life prediction process and provides information on the role and responsibilities of a service life engineer.
Available in the following language(s): Spanish