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2014FallShotcreteEMag

EFNARC Nozzleman Certification Scheme By Dan Millette Eresenting producers and applicators of remedy these shortcomings in undergroundConsequently, EFNARC and the ITA launchedthe Nozzleman Certification Scheme in 2009 to-FNARC was an acronym for “EuropeanFederation of National Associations Rep specialist building products for Concrete,” applications. Unlike the ACI program, the which was founded by the European concrete EFNARC program only deals with wet-mix industry in 1989. Over the years, the name of shotcrete or “sprayed concrete” as it is termed in the organization has changed to “Experts for Europe, and rightfully so, as concrete is exactly Specialised Construction and Concrete Sys- what is being sprayed. tems,” but the acronym remains EFNARC. In cooperation with the International Tunneling Program Differences and Underground Space Association (ITA), it The EFNARC scheme does not even discuss was decided that there needed to be a standard dry-mix and they have no distinction between for robotically sprayed concrete. vertical and overhead certifications as the ACI As is now occurring in North America, program does; if you are shooting underground, Europeans were early to convert from dry-mix then it is simply assumed that you will be shotcreting to the wet-mix process, especially shooting vertical and overhead. Other than the in underground applications. In North America, omission of the dry-mix, the education portion the American Concrete Institute (ACI) began or the course for the EFNARC program is a to offer shotcrete nozzleman certification little heavier on certain aspects than the ACI programs for both dry-mix and wet-mix. But program. EFNARC has more emphasis on the this certification program only deals with materials that go into a mixture, including handheld nozzle application and is somewhat aggregate, cements, pozzolans, and chemicals, lacking in shooting methods for underground and their effects when shooting. applications. The ACI program also does not The course also spends some time discussing deal with any type of mechanical or robotic nozzle accelerators. One other item where there arms or spraying equipment, which is becoming is significant focus is in the handling of plugged the standard in tunneling and mining operations. lines because this is a significant safety issue. There is also a section on concrete testing. Then, of course, there are the sections of the education portion that cover the equipment used to spray as well as procedures for unloading the mixers. One other major difference is that the ACI certification is valid for 5 years while the EFNARC certification is only valid for 3 years. Examiner Selection EFNARC examiners must fill in an application form and submit a résumé. EFNARC states that “an Examiner shall have a wide experience of underground construction and sprayed concrete applications.” The application form also asks the examiner in what region he expects to do certifications and in what language(s). The region can be as specific as a single portion of a country or as large as the entire world. Once accepted, the examiner must travel to the Hagerbach test facility in Switzerland for a 3-day course that consists of 30 Shotcrete • Fall 2014


2014FallShotcreteEMag
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