Concrete Products

JUL 2019

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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26 • July 2019 www.concreteproducts.com NEWS SCOPE PRACTICE The new Verify app allows users to quickly and easily confirm American Concrete Insti- tute-certified individuals' status by name or certification ID number. ACI has certified 400,000-plus concrete finishers, technicians, supervisors, inspectors and managers since the 1980s, and counts more than more than 120,000 active certifications across 25-plus programs worldwide. "Verify is the perfect tool on the jobsite," says ACI Managing Director, Certification John Nehasil. "Using simply a phone or tablet, anyone can easily verify the status of people working on a particular project or find the The latest American Society of Concrete Contractors position statement, "Measuring Air Content in Non-Air-Entrained Concrete," conveys contractors' point of view for archi- tects, engineers, owners and other project stakeholders. The document explains that while air content is reported in the mix design submitted for air-entrained concrete and gauged in the field for compliance, air content measurements are rarely specified or performed for non-air-entrained concrete. Widely referenced specifications cite maximum air content in concrete floors to receive a hard-troweled finish for good reason, according to ASCC Technical Director Bruce Suprenant, PE, PhD, FACI. "Air-en- training admixtures should not be specified or used in concrete to be given a smooth, dense, hard-troweled finish due to the prob- ability of blistering or delamination," he explains. ASCC contractors have observed that when water-reducing and/or waterproofing admixtures are used in concrete to receive a hard-troweled finish, air contents often exceed the 3 percent maximum set out in ACI 302.1R-15, Guide to Concrete Floor and Slab Construction. Often contractors aren't alerted to this issue because the air content isn't measured, notes Suprenant. Consequently, the new position statement concludes, contractors should encourage owners to direct specifiers to require measuring the air content of concrete to receive a hard-troweled finish. ACI app instantly checks technician, inspector certification CONTRACTORS MEASURE AIR CONTENT OF NON-AE MIXES total number of ACI-certified individuals in an area. Certified workers provide assurance that testing, placing, and inspecting are performed correctly." The Verify app helps the entire verifica- tion process move more quickly and easily so jobs can proceed, he adds, and bears the same functionality of the ACI's concrete. org/verify web-based tool. The app is cur- rently available in iOS platform from the Apple App Store; an Android version is in the works. — www.concrete.org Toll-Free (US): 888-235-8235 | Tel: (920) 894-1113 | Email: sales@bftech.com Concrete Reclaimers RED LINE • pH Controls • Flocculants • SMART Bunker BFK T ECHNOLOGIES I NC. Clear Water Solutions BLUE LINE TOTAL SYSTEMS SOLUTIONS

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