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Shotcrete Corner U.S. Shotcrete Standards update By Charles Hanskat tmember of ASA; a past Chairman and active • this document. The development of revised text-ACI 506R-05, “Guide to Shotcrete”: The subcommittee (506-C) is working on revisions tohis article is dedicated to Pete Tatnall, afounding member, Past President, and Board member of various ASTM International committees is completed in the subcommittee and will be dealing with fiber and shotcrete; and a longtime balloted to the main committee before the ACI active member of American Concrete Institute Fall 2013 Convention. As the Guide is a non- (ACI) Committee 506, Shotcreting. He was a mandatory document and serves as a “primer” regular contributor to Shotcrete magazine and on shotcrete for the industry, good photos are provided regular updates to Shotcrete Corner with an important component of the document. articles on U.S. shotcrete standards. With great Watch your e-mail, as ACI Committee 506 may sorrow, we note that Pete passed away April 26 request photos from members of ASA for of this year after a long, valiant 18-month battle specific aspects of shotcreting for the Guide. with illness. Pete was a great contributor to the • ACI 506.1R-08, “Committee Report on Fiber- shotcrete industry who readily shared his knowledge Reinforced Shotcrete”: Pete Tatnall was Chair and experience with members and committees of of this subcommittee (506-B) and completed ACI, ASTM International, and ASA. He will be revisions to the 1998 version of the document. greatly missed. The current Chair, Jeff Novak, is working with It’s been over 5 years since we last updated our the subcommittee on revisions to the document. reference list of shotcrete-related standards and • ACI 506.4R-94 (Reapproved 2004), “Guide specifications. In that time, we’ve seen a significant for Evaluation of Shotcrete”: Marc Jolin, Chair increase in activity by various standards developing of the subcommittee (506-A), has revised the organizations in creating new documents incor- document within the subcommittee and is porating shotcrete and updating their existing planning a ballot on proposed revisions for the documents. Readers are requested to contact the main committee before the ACI Fall 2013 editor and author if inaccuracies are found in the Convention. A new section on “Acceptance of following report, if additional activities should be Shotcrete” is concurrently being developed by reported, or if new activities should be initiated. Jim Ragland. • ACI 506.5R-09, “Guide for Specifying Under- ACI (www.concrete.org) ground Shotcrete”: Pete Tatnall also chaired ACI Committee 506, Shotcreting, is currently this subcommittee (506-F), which prepared chaired by Larry Totten; and Marc Jolin serves as ACI Committee 506’s newest document. This Secretary. The committee is divided into subcom- document serves as a guide for engineers and mittees and task groups, each concerned with a owners who are specifying shotcrete for under- specific document or issue. The subcommittees ground applications. It is not a construction are working on: specification geared toward the contractor that • ACI 506.2-95, “Specification for Shotcrete”: can be directly incorporated into contract The specification has been completely revised documents for a specific project (such as ACI and balloted through the subcommittee (506-E) 506.2-95) but serves to provide specifiers guid- and the main committee, passed Technical ance on what is needed in their particular Activities Committee (TAC) review, and project specification. undergone a public review period of 45 days. • ACI Committee 506 new document, “Guide The main committee has balloted the responses for Contractor Qualifications for Specific to public comments. It is anticipated that the Projects”: Chaired by Marcus von der Hofen, new version, ACI 506.2-13, will be available this subcommittee (506-G) is close to finishing for purchase later this year. the document within the subcommittee. The 44 Shotcrete • Summer 2013


2013SumShotcreteEMag
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