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A variety of sand and gravel crushers ushered in new upgrades, but it seems that it has not changed. What has changed?

A variety of sand and gravel crushers ushered in new upgrades, but it seems that it has not changed. What has changed?

Feb 03, 2020 ACI 506 has a new document ACI 506.6T-17, “Visual Shotcrete Core Quality Evaluation Technote,” that is intended to assist specifiers with evaluating shotcrete core quality for an intended use. So yes, the 506.2-95 version of the specification and the grading system it included is no longer supported as an industry standard.

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