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2013SumShotcreteEMag

ACI’s Certification Policies for mix shotcrete with the assistance of a task group under the direction of ACI Committee C660. Shotcrete Nozzlemen Qualifications must be submitted separately for ACI Committee C660’s original mandate was the dry- and/or the wet-mix processes. to develop, maintain, and update programs for The requirements are described as follows: use in certification of persons performing as • The Examiner shall be authorized by ACI to shotcrete nozzlemen. As the certification pro- conduct nozzleman certification examinations gram grows, the program policies are continually for only the shotcrete process for which the updated to maintain the integrity of the program. Examiner is approved; and • To be considered for approval as an Examiner ACI Recertification Policy and to maintain Examiner status, the applicant One of the committee’s objectives in main- shall meet the following requirements: taining the integrity of the program was to A. Be knowledgeable about shotcrete and provide an incentive to contractors to recertify thoroughly familiar with the current appli- before certification expires. To avoid dupli- cable reference documents; and cating the expense of the original shotcrete B. Have a total of at least 5 years of docu- certification program, the policies were updated mented experience in at least two of the to allow the shotcrete contractor to have recer- following four categories: tification conducted without mandatory ASA 1. Testing, inspection, and quality control training and related incidentals, such as the of shotcrete; written examination. These changes were intro- 2. Supervision of shotcrete construction duced as follows. work; A candidate may renew certification (recertify) 3. Design of shotcrete structures; and by successfully completing: 4. Shotcrete nozzling. 1. A structured oral interview with the Examiner. C. Have sufficient experience to evaluate and The interview is in lieu of the written exam judge the qualifications of shotcrete noz- requirement imposed for initial certification zleman applicants and conduct written and and is designed to substantiate that the can- performance examinations. For each pro- didates have retained their knowledge of the cess, this experience must be (but is not safe and competent application of shotcrete limited to): and are made aware of any new developments • Knowledge of both vertical and over- in this area of concrete construction; and head spraying; and 2. A performance examination as per the current • Knowledge and experience on more than policies. one type of equipment (gun, pump, or This recertification policy is available for nozzle). those who are seeking recertification in the D. Have participated to the satisfaction of the same process within 6 years of their previous Examiners of Record in all phases of at ACI-issued certification. Nozzlemen must least two ACI-sanctioned shotcrete noz- possess at least 1000 hours of work experience zleman certification programs for the as a shotcrete nozzleman within the 2 years process in which approval is sought, with immediately prior to seeking recertification or different Examiners of Record for each possess an average of 500 hours per year of shot- session. For the first session, the applicant crete nozzleman experience within the 5 years must serve as proctor and Supplemental immediately prior to seeking recertification. Examiner. For the second session, the Most recertification sessions have been applicant shall serve as a Proctor and conducted at job sites where ACI examiners Supplemental Examiner and conduct all were able to travel to conduct recertification phases of the session, including written rather than asking a group of nozzlemen to examination; performance examination; travel to a single location. This has enabled and core grading, under the direct supervi- recertification costs to be kept to a minimum. sion of the Examiner of Record for both vertical and overhead; ACI Examiner Requirements— E. Attain a passing grade on the written exam Approval Process Policy for each process sought; and As the certification program grows, the need F. To maintain Examiner status, the Examiner for more ACI-approved Examiners increases. must have conducted or assisted in at least Also, the program must be readily accessible to three ACI-sanctioned shotcrete nozzleman shotcrete nozzlemen throughout North America. certification programs in 5 years, if not According to the recent updated policy, an actively participating in ACI Committee Examiner must be approved for dry- and/or wet- C660 activities. 14 Shotcrete • Summer 2013


2013SumShotcreteEMag
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