04-18-2017, 07:04 PM
Concrete International February 2017 v. 39 No. 2
Author(s)/Editor(s): American Concrete Institute | Size: 8.63 MB | Format: PDF | Quality: Original preprint | Publisher: American Concrete Institute | Year: 2017 | pages: 80
Author(s)/Editor(s): American Concrete Institute | Size: 8.63 MB | Format: PDF | Quality: Original preprint | Publisher: American Concrete Institute | Year: 2017 | pages: 80
Shallow Embedded Anchors
Although ACI 318-14 provides design requirements for anchors in concrete, it does not apply to specialty inserts used for anchoring nonstructural elements. Background information is provided on the ACI 318 design procedure, shallow anchors and related parameters are discussed, and modification factors are proposed for ACI 318 design values.
Nano-Modified Fly Ash Concrete
Nano-modified fly ash concrete was recently used for partial-depth repair of transverse joints located on a major urban arterial road in Winnipeg, Canada. The project was the first field trial of the material, and it successfully demonstrated mixing, placement, and testing procedures as well as indicated potential for long-term performance.
Crumb Rubber Concrete Bridge Deck
In 2006, a bridge deck was constructed in China using a mixture of portland cement concrete and rubber crumbs. Although about 5% of the deck surface developed shallow shrinkage cracks shortly after placement, the rest of the deck remains crack-free. It is postulated that the crumbs create elastic joints that reduce stress concentrations near the tips of microcracks.
French Dam Technology Passes the Test
The "French Dam" is a new technology for construction of small- to medium-sized hydroelectric and water control systems. Comprising modular segments manufactured offsite in a controlled environment, the system is designed for new or retrofit projects. The fabrication, installation, and testing processes are described.
A Safe Corrosion Solution for Potable Water Reservoirs
A new potable water reservoir was constructed in Tarragona, Spain. Based on past experiences, migrating corrosion inhibitors were selected to provide long-term protection against corrosion and help meet a 50-year design life. The admixtures had no apparent negative effects on the setting time or physical properties of the concrete.
Guide to Shotcrete
This article is a reprint of a paper that originally appeared in the Summer 2016 issue of Shotcrete. It discusses updates to “Guide to Shotcrete (ACI 506R-16),” including new and expanded sections.
Concrete Q&A: ACI 318M-14 versus ACI 318-14—Eq. 18.10.4.1 and Fig. R18.7.5.2
Equation (18.10.4.1) of ACI 318M-141 looks the same as Eq. (18.10.4.1) in ACI 318-14.2 Why do the values assigned to the coefficient αc vary by a factor of 12 between the two versions of the code?
ACPA 2016 Excellence in Concrete Pavements Awards
The American Concrete Pavement Association (ACPA) has named the recipients of its 27th Annual Excellence in Concrete Pavements Awards, which recognize quality concrete pavements constructed in the United States and Canada.
ACI Concrete Sustainability Forum IX
ACI Concrete Sustainability Forum IX took place in October 2016 at the ACI Concrete Convention and Exposition. The forum featured presentations from seven experts on sustainability design, sustainability assessment systems, and new material technologies for sustainable buildings and civil engineering structures.
Revolutionary Concrete and Its Innovative Applications
Highlights of The ACI Concrete Convention and Exposition – Fall 2016.
Knowledge to Practice: ACI Foundation
CRC Announces New Research Product
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