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Description of ASTM-C400 2013ASTM C400 - 98(2013)Standard Test Methods for Quicklime and Hydrated Lime for Neutralization of Waste AcidActive Standard ASTM C400 | Developed by Subcommittee: C07.05 Book of Standards Volume: 04.01 ASTM C400Significance and Use 4.1 Since all limes and waste acid solutions are different, this test method evaluates the relative quantity of a given lime needed for the neutralization of a specific quantity of acid. 4.2 Liming materials have a specific basicity factor or measure of alkalinity which can be used for comparing their relative neutralizing power. It avoids dependence on chemical analysis and is determined as grams of calcium oxide equivalents per kilogram of liming material. 4.3 Likewise, specific waste acids have an acid value that can be expressed as grams of hydrochloric acid equivalent per litre of acid waste. This value is related on a stoichiometric basis to lime neutralization requirements of a liquid acid waste. 1. Scope 1.1 This test method covers the testing of quicklime and hydrated lime for use in the treatment of waste acid solutions and includes the characterization of the liming material and of the acid waste.
Note 1 When agreed upon by the manufacturer and the purchaser, this method may be used directly to evaluate the
lime requirement for a plant waste acid and in the preparation of the lime slurry; the pH, the time, temperature, and other conditions of treatment may be adjusted to conform to plant
practice. Otherwise the test shall be performed as described in this method.
Note 2 Under some conditions of test the lime requirement may vary substantially from that indicated by
ultimate chemical analysis or by the use of a determination of available alkalinity by titration to a stoichiometric end point.
1.2 This standard does not purport to address all of 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.
ASTM Standards C50 Practice for Sampling, Sample Preparation, Packaging, and Marking of Lime and Limestone Products E70 Test Method for pH of Aqueous Solutions With the Glass Electrode Keywords acid value; alkalinity; basicity; lime requirement; liming material; neutralization; neutralization coefficient; pH; waste acid; ICS Code ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar) DOI: 10.1520/C0400 ASTM International is a member of CrossRef. ASTM C400This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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