1.1 This guide discusses procedures that may be used for evaluating the comparative change in pH of reagent water placed on the surface of a properly prepared concrete substrate surface. 1.2 This guide is intended to be used in conjunction with the flat surface electrode pH meter manufacturers calibration procedures, operation instructions, and interpretive data where available. 1.3 This guide is intended to be used in conjunction with the pH paper manufacturers instructions, product shelf life, and interpretive data where available. 1.4 This standard does not purport to address all the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Some specific hazards statements are given in Section 9 on Hazards.
Keywords1.1 alkali; carbonation, pH, reagent water; substrate
WK Item 69831 was withdrawn due to one or more persuasive negatives. Currently, there is no stand-alone procedure for determining the substrate surface pH of a concrete floor slab. Currently, paragraph 5.2 of Practice F710 addresses this; however, incorporating a test method within a Practice is inconsistent with the requirements of the ASTM Form & Style Manual. A separate standard such as proposed here, which F710 and manufacturers could reference at their discretion, would address this. Also, previous methods to evaluate substrate surface pH were significantly flawed; there was no requirement to test the pH of the reagent (distilled or deionized) water before using that water to evaluate the concrete substrate surface pH. This Guide addresses this.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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