05-07-2017, 05:50 AM
MAGAZINE - Concrete International APRIL 2017 V. 39 No. 4
Author(s)/Editor(s): American Concrete Institute | Size: 6.28 MB | Format: PDF | Quality: Original preprint | Publisher: American Concrete Institute | Year: 2017 | pages: 84
Author(s)/Editor(s): American Concrete Institute | Size: 6.28 MB | Format: PDF | Quality: Original preprint | Publisher: American Concrete Institute | Year: 2017 | pages: 84
Successful Design of Wet-Mix Shotcrete
Although wet-mix shotcrete has proven to be an ideal alternative to conventional concrete in numerous applications, its further success is sometimes hindered by a few common misconceptions. The article discusses some of those fallacies and presents corresponding facts. It also explains why successful shotcreting requires consideration of all desired performance criteria and project needs.
Precast Concrete Pavement Implementation
Precast concrete pavement (PCP) technology is gaining wider acceptance in the United States for the rapid repair and rehabilitation of heavily trafficked asphalt and concrete pavements. Rehabilitation work using PCP is typically performed overnight over a single lane. Two applications of PCP technology are described: installation of concrete bus pads at the East Main Street Station in New Britain, CT, and rehabilitation of the SH 97 and SH 72 intersection in Fowlerton, TX.
2016 ICRI Project Awards
The International Concrete Repair Institute (ICRI) presented the 2016 ICRI Project Awards at the ICRI Fall Convention in Cleveland, OH, on November 10, 2016.
A Creative, Functional Upgrade
A team of consultants were contracted to correct a functional deficiency in a contact basin at the Sid Copeland Water Treatment Plant, Louisville, CO. The team found that although the roof structure was visibly weathered, the concrete structure was in good overall condition. To correct the functional problem, the team recommended a series of baffle walls to increase the flow distance through the basin and ensure sufficient chlorine contact time. The contractor used self-consolidating concrete to construct full-height baffle walls, solving the functional issue and providing additional support to the roof.
Computerized Project Management System
A computerized project management system (CPMS) was developed in 1980s during construction of the King Saud University campus, Riyadh, Saudi Arabia. The CPMS was built around the critical path method algorithm. The significance of the CPMS was to provide a realistic management tool for handling an enormous number of detailed activities over the nearly 10 years required to execute the project.
Products & Practice Spotlight: Repair of ASR-Damaged Piles
In 2000, severe cracking due to alkali-silica reaction was noted in piles supporting a bridge over the tidal estuary of the Barron River near Cairns, Queensland, Australia. After 14 years of searching for a system that could protect the piles and provide confinement to combat further damage, the PileMedic® system was selected. The adopted solution met these goals, could be rapidly and safely installed, and provided major savings compared to the original reinforced concrete encasement option.
Knowledge to Practice: ACI Foundation
Concrete Research Council Announces High-Strength Steel Research Product
Awards at The ACI Concrete Convention and Exposition – Spring 2017
For their outstanding achievements and service to the Institute, ACI recognized selected members at The ACI Concrete Convention and Exposition – Spring 2017 in Detroit, MI.
Concrete Q & A: Reinforcement Termination in Wastewater Concrete Containment and Designing Roads for 50+ Years
Does ACI 350-06 allow terminations of vertical reinforcing bars in a wastewater concrete containment tank wall? Is it a reasonable goal to design roads to last at least 50 years before they need to be rebuilt?
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