11-19-2017, 10:02 AM
(This post was last modified: 11-20-2017, 11:02 AM by Dell_Brett.
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Concrete International November 2017 No. 11 Complete Issue
Author(s)/Editor(s): ACI | Size: 7.38 MB | Format: PDF | Quality: Original preprint | Publisher: ACI | Year: 2017 | pages: 64
Author(s)/Editor(s): ACI | Size: 7.38 MB | Format: PDF | Quality: Original preprint | Publisher: ACI | Year: 2017 | pages: 64
Position Statements from the Concrete Polishing Council of ASCC
Concrete Polishing Association of America (CPAA), created by a small group of contractors in 2010, is now the Concrete Polishing Council (CPC)—one of four specialty councils within American Society of Concrete Contractors (ASCC). The CPC has spent the last year developing educational products, refining its certification process, and publishing documents to help define the industry and the polishing contractor’s place in it. Three Position Statements that accompany this article comprise some of this work.
Uncoupling Modulus of Elasticity and Strength
To limit lateral deformations and ensure occupant comfort, designers of tall concrete buildings may specify a high modulus of elasticity (MOE) for the structural concrete. While MOE can be raised by increasing concrete compressive strength or using stiffer aggregates, such mixtures can be prone to brittle behavior and high autogenous shrinkage. There is an alternative way to obtain a high MOE, using carbon nanotubes, which, if well dispersed, can increase MOE of concrete without increasing the compressive strength.
Winners of the 2017 ACI Excellence in Concrete Construction Awards
A house comprised of architectural concrete, R·torso·C, received “The Excellence Award,” the highest honor in the ACI Excellence in Concrete Construction Awards program for 2017. The winning project was submitted by the Japan Concrete Institute. This award is given to a project that demonstrates excellence in concrete innovation and technology and stands out above all other entries. Eleven additional global projects were recognized October 16, 2017, during the Gala event at The ACI Concrete Convention and Exposition in Anaheim, CA.
Can We Design Concrete to Survive Nuclear Environments?
This article is a summary of a panel discussion that took place during the 123 Forum session at The Fall 2016 ACI Concrete Convention and Exposition in Philadelphia, PA. The panelists and one of the moderators have been actively involved in research efforts to improve understanding of the effects of nuclear environments on concrete and cementitious grouts as well as the ability to monitor degradation of nuclear structures.
A Tale of Two Dams
The failure of the primary service spillway for California’s Oroville Dam on the Feather River has piqued the interest of the dam building profession worldwide. Possible origins of the failure are examined through a comparison between Oroville Dam and Daniel-Johnson Dam in Quebec, Canada.
Concrete Q&A: Welded Wire Reinforcement Placement
ACI 301-16 provides placement requirements for WWR
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