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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
Architectural concrete requires a higher aesthetic finish than typical structural cast-in-place work. If structural concrete is expected to meet the aesthetic requirements normally associated with architectural concrete, the more subjective properties must be qualified and bid as architectural requirements. Otherwise, final acceptance of cast-in-place structural concrete might be difficult.
Available in the following language(s): Spanish
The HOUSEofCARDS is a design-build project in Arnaudville, LA, USA, which won an ACI Louisiana Chapter Excellence in Concrete Construction Award. The project was conceived as a folly on a rural piece of land and serves as an artist’s retreat for a nonprofit community organization.
Available in the following language(s): Spanish
The first part of this two-part Q&A focuses on provisions for using bundled No. 11 bars in beams and bundled No. 14 and No. 18 bars in drilled shafts. The second part discusses requirements on extending column ties into the footings and drop panels.
Available in the following language(s): Spanish