ASTM C566 - 19
Standard Test Method for Total Evaporable Moisture Content of Aggregate by Drying
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Significance and Use
4.1 This test method is sufficiently accurate for usual purposes, such as adjusting batch quantities of ingredients for concrete. It will generally measure the moisture in the test sample more reliably than the sample can be made to represent the aggregate supply. In cases where the aggregate itself is altered by heat, or where more refined measurement is required, the test should be conducted using a ventilated, controlled temperature oven.
4.2 Large particles of coarse aggregate, especially those larger than 50 mm, will require greater time for the moisture to travel from the interior of the particle to the surface. The user of this test method should determine by trial if rapid drying methods provide sufficient accuracy for the intended use when drying large size particles.
1. Scope
1.1 This test method covers the determination of the percentage of evaporable moisture in a sample of aggregate by drying both surface moisture and moisture in the pores of the aggregate. Some aggregate may contain water that is chemically combined with the minerals in the aggregate. Such water is not evaporable and is not included in the percentage determined by this test method.
1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.
Note 1: Sieve size is identified by its standard designation in Specification E11. The alternative designation given in parentheses is for information only and does not represent a different standard sieve size.
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see 5.3.1, 7.2.1, and 7.3.1.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
C29/C29M Test Method for Bulk Density (Unit Weight) and Voids in Aggregate
C125 Terminology Relating to Concrete and Concrete Aggregates
C127 Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate
C128 Test Method for Relative Density (Specific Gravity) and Absorption of Fine Aggregate
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
D75/D75M Practice for Sampling Aggregates
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
Other Document
National Research Council Report SHRP-P-619 AvailaICS Code
ICS Number Code 91.100.01 (Construction materials)
UNSPSC Code
UNSPSC Code 30111800(Aggregates)
Referencing This Standard
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DOI: 10.1520/C0566-19
Citation Format
ASTM C566-19, Standard Test Method for Total Evaporable Moisture Content of Aggregate by Drying, ASTM International, West Conshohocken, PA, 2019, www.astm.org
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