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Swirl and broom finishes are typically specified for working surfaces of parking structures, parking lots, commercial pavements, or walkways. Unfortunately, the construction documents for many such projects specify unachievable F-numbers for slabs that are also specified to receive textured finishes. The article provides a bibliography of recommendations and requirements for slab F-numbers and finishes published in ACI documents, other industry resources, and sample project specifications, demonstrating that many conflicting requirements can negatively affect contractors charged with producing swirl and broom finishes.
Available in the following language(s): Spanish
Available in the following language(s): Spanish
The American Concrete Institute (ACI) Excellence in Concrete Construction Awards program is entering its 8th year. In addition to project nomination through local ACI chapters or international partners, a new self-nomination option has been announced, making it easier for companies and organizations to achieve recognition for their work.
Available in the following language(s): Spanish
Asphaltic concrete pavements are generally repaired using cold patch and hot mix products. While cold patch material can be applied quickly and is low in cost, it is not durable. Because hot mix repair products are applied like newly paved surfaces, they are high in cost and are typically used for larger repairs. The article discusses a new type of a cementitious repair material suitable for asphalt and concrete pavements that is easy to apply and durable.
Available in the following language(s): Spanish
There is a need to further study mixtures for three-dimensional concrete printing (3DCP) that incorporate fractions of large aggregates to develop more robust composition and achieve a feedstock with lower embodied energy. The main scope of this article is the scaling up of the solid constituents in such 3DCP mixtures.
Available in the following language(s): Spanish