ASTM C70 - 20
Standard Test Method for Surface Moisture in Fine Aggregate
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Significance and Use
4.1 This test method is not widely used. However, it is a convenient procedure for field or plant determination of moisture content of fine aggregate if specific gravity values are known and if drying facilities are not available. It can be used to adjust the aggregate mass for moisture content and to determine surface moisture contribution to mixing water in portland cement concrete.
4.2 The accuracy of the test method depends upon accurate information on the bulk specific gravity of the material in a saturated surface-dry condition.
1. Scope
1.1 This test method covers field determination of the amount of surface moisture in fine aggregate by displacement in water.
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.
1.3 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.
1.4 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
C125 Terminology Relating to Concrete and Concrete Aggregates
C128 Test Method for Relative Density (Specific Gravity) and Absorption of Fine Aggregate
C566 Test Method for Total Evaporable Moisture Content of Aggregate by Drying
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
ICS Code
ICS Number Code 91.100.30 (Concrete and concrete products)
UNSPSC Code
UNSPSC Code 30111800(Aggregates)
Referencing This Standard
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DOI: 10.1520/C0070-20
Citation Format
ASTM C70-20, Standard Test Method for Surface Moisture in Fine Aggregate, ASTM International, West Conshohocken, PA, 2020, www.astm.org
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