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2013SumShotcreteEMag

Shotcrete Corner next step for the document will be balloting document produced by ACI Committee 350, to the main ACI 506 committee. The ACI Environmental Engineering Concrete Struc- Committee 506 leadership is also considering tures. It is a construction specification similar incorporating the material into the revised to ACI 301 but intended for liquid-containing “Guide for Evaluation of Shotcrete” rather than structures rather than buildings. Because shot- publishing it as a stand-alone document. crete is widely used in environmental structures, • ACI Committee 506 new document, “Tech it addresses both concrete and shotcrete. Note for Visual Evaluation of Shotcrete Core ASA members continue to play a significant Quality”: Chaired by John Zhang, this task role in the leadership of ACI Committee 506 and group is developing a Tech Note to provide a contribute to the efforts of the subcommittees. reference for visual evaluation of shotcrete Readers should contact the subcommittee Chairs quality using cores. As with the “Guide to if they have contributions. Shotcrete,” good-quality images are key to the It should be noted that the only ACI Committee usefulness of the document. Watch your 506 document mentioned that can be directly e-mail, as ACI Committee 506 may request incorporated by reference into project specifications photos from members of ASA of specific is ACI 506.2R-95 (hopefully soon to be replaced examples of cores. by ACI 506.2-13). If portions of any of the other • ACI 506 new document, “Tech Note on Accep- documents are appropriate for the project tance of Shotcrete”: Chaired by Jim Ragland, specification, the applicable language should this task group is working on a document to be put into mandatory language and inserted address acceptance criteria of shotcrete. by the specifier into the project specification. Because the scope and complexity of shotcrete ACI Committees 506 and C660 and subcommittees projects can vary widely, the task group is will meet in Phoenix, AZ, during the ACI Fall developing the concept of “Application Dif- 2013 Convention. ficulty Level” and establishing corresponding acceptance criteria that can vary with the ASTM International application. The ACI Committee 506 leader- ship is also considering incorporating the (www.astm.org) material into the revised “Guide for Evaluation ASTM International Committee C09, Concrete of Shotcrete” rather than publishing it as a and Aggregates, continues its work on specifica- stand-alone document. tions and test methods for shotcrete. The C09 • ACI C660: Both English and Spanish versions committee and most subcommittees met in of CP-60(09), “Craftsman Workbook for ACI Indianapolis, IN, June 10-12, 2013, to work on Certification of Shotcrete Nozzleman,” are avail- the latest ballot activities for revising documents able from ACI and were updated by ACI Com- and developing new ones. The author is a voting mittee C660, which is chaired by Marc Jolin. member of ASTM Committees C09, Concrete • ACI 350.5-12, “Specifications for Environ- and Concrete Aggregates, and ASTM Subcom- mental Concrete Structures”: This is a new mittees C09.46, Shotcrete; C09.64, Nondestructive STRUCTURAL SHOTCRETE SYSTEMS, INC. LICENSE #579272 A JASON E. WEINSTEIN, P.E. VICE PRESIDENT 12645 CLARK STREET (562) 941-9916 SANTA FE SPRINGS, CA 90670 FAX (562) 941-8098 Shotcrete • Summer 2013 45


2013SumShotcreteEMag
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