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Exposure to heavy vehicles, rain, and high-water tables can cause damage that necessitates soil stabilization to restore the original load-bearing capacity and extend a road’s service life. With copolymers, these objectives become easy and affordable. Copolymers capsulate soil particles, bind them together into larger soil particles, and create a solid, dense, and hydrophobic layer.
Available in the following language(s): Spanish
To address a decline in productivity in concrete construction, ACI has introduced a new center of excellence. Established a few months ago, PRO: An ACI Center of Excellence for Advancing Productivity will bring together leaders from across the architecture, engineering, and construction (AEC) industry to identify potential barriers and find solutions.
Available in the following language(s): Spanish
This month’s Q&A discusses a disagreement between a subcontractor and a general contractor (GC) on tolerances governing concrete work on the project. While the subcontractor believes that 1 in. tolerances in ACI 117-10(15) for horizontal deviations for edge-of-slab location and column location apply, the GC insists on a zero-tolerance condition illustrated in a detail drawing.
Available in the following language(s): Spanish
Concrete materials are versatile and strong candidates for extraterrestrial construction. Initial observations from the Materials International Space Station Experiment-Flight Facility show promising results for the durability of geopolymer lunar concrete. While these experiments are a step forward, work is still needed to make the goal of human habitation on the lunar surface feasible.
Available in the following language(s): Spanish
The concept of “partial strength reduction factors” has long been used in Canadian, British, and European building codes. Expanding the use of material ϕ factors (one for concrete and one for steel reinforcement) to all sections and members would provide a uniform approach to factored strength calculations and resolve several abnormalities in the current ACI 318 Code.
Available in the following language(s): Spanish