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ACI 506: Shotcrete Witness Evaluation by ScribdTranslations is a document available to read on EtoBox.

This chapter describes the ACI 506 requirements for assessing the quality of shotcrete and qualifying operators. Test panels must be prepared for each mix and operator, and the compressive strength of unreinforced specimens must be evaluated and reinforced specimens classified on a scale from 1 to 5. An average grade of less than or equal to 2.5 is acceptable.

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