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Concrete Dec 2018

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Page 26 of 43

SPONSORED CONTENT 27 COATINGSPRO CONCRETE COVERED DECEMBER 2018 The appendix is not a mandatory part of the standard, but it provides useful additional information. Acceptance Criteria Updated As the committee members reviewed the standard, it became apparent that some major changes were needed to make the standard relevant for today's industry users. One area that required updating was the acceptance criteria section. "e acceptance criteria have been given a little more 'teeth ' by making them required instead of just a suggestion," said Jenkins. e most critical section of this standard — the accep- tance criteria of concrete surfaces prepared for coating instal- lation — is similar to the original, but it has been updated and some areas rewritten for clarification. For example, the original version suggested criteria for acceptable surface preparation; the new version states minimum acceptance crite- ria that is only superseded by the procurement documents or more stringent requirements indicated by the manufacturer of the specific coating or lining intended to be applied, according to a presentation given at SSPC 2018 by the TG leaders. Updated Tables Provide More Guidance In this revised version, the standard includes updated tables. For the first time, surface preparation classifications are detailed in Table 1 in the standard. For example, in Table 1, the acronym "D-VC" represents "vacuum cleaning." To accompany the information in Table 1, Table 2 provides minimum acceptance criteria for concrete surfaces before coatings are applied, and it includes relevant test methods and references. e updated appendix (nonmandatory) also includes updated tables: Table A1 provides typical surface properties Surface Preparation Standard Table 1 - Classes of Surface Preparation Class Method Profile Range (CSP) (A) Section Referenced D-VC Vacuum Cleaning NC (B) 4.2.2 W-LP Low Pressure Water Rinse NC (B) 4.2.2 W-DS Detergent Scrubbing NC (B) 4.2.3 W-SC Steam Cleaning NC (B) 4.2.3 W-AE Acid Etching 1 – 3 4.4 W-WJ Waterjetting (includes 3 – 10 4.3.2 M-GRD Hydrodemolition and Hydroblasting) 1 – 2 4.3.4 M-GRD Grinding – Dry 1 – 2 4.3.4 M-GRW Grinding – Wet 1 – 2 4.3.4 M-ABD Abrasive Blasting – Dry 3 – 7 (A) 4.3.1 M-ABW Abrasive Blasting – Wet 3 – 7 (A) 4.3.1 M-SB Shot Blasting 3 – 9 (A) 4.3.1 M-SC Scarifying 4 – 7 4.3.3 (A) ICRI (1) 310.2, 2 Concrete Surface Profiles (CSP). (A) The CSP profiles produced by the various preparation methods listed here are defined in ICRI 310.2. NOTE: There may be some differences between this standard and ICRI on the actual profile range achieved by each surface preparation standard. Each method produces a range of CSP profiles, depending on the quality and strength of the concrete and the degree to which the method is applied. A nonag- gressive use of a preparation method on good quality concrete results in a CSP profile at the low end of the range of listed profiles (i.e., a less coarse surface). When selecting a preparation method, a test area should be performed to determine the CSP profile. (B) No Change

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