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1.1 These test methods cover the determination of the loose uncompacted void content of a sample of fine aggregate. When measured on any aggregate of a known grading, void content provides an indication of that aggregate's angularity, sphericity, and surface texture compared with other fine aggregates tested in the same grading. When void content is measured on an as-received fine-aggregate grading, it can be an indicator of the effect of the fine aggregate on the workability of a mixture in which it may be used.
1.2 Three procedures are included for the measurement of void content. Two use graded fine aggregate (standard grading or as-received grading), and the other uses several individual size fractions for void content determinations:
1.2.1 Standard Graded Sample (Test Method A)—This test method uses a standard fine aggregate grading that is obtained by combining individual sieve fractions from a typical fine aggregate sieve analysis. See the section on Preparation of Test Samples for the grading.
1.2.2 Individual Size Fractions (Test Method B)—This test method uses each of three fine aggregate size fractions: (a) 2.36 mm (No. 8) to 1.18 mm (No. 16); (b) 1.18 mm (No. 16) to 600 m (No. 30); and (c) 600 m (No. 30) to 300 m (No. 50). For this test method, each size is tested separately.
1.2.3 As-Received Grading (Test Method C)—This test method uses that portion of the fine aggregate finer than a 4.75-mm (No. 4) sieve.
1.2.4 See the section on Significance and Use for guidance on the method to be used.
1.3 The values stated in SI units shall be regarded as the 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B88 Specification for Seamless Copper Water Tube
B88M Specification for Seamless Copper Water Tube (Metric)
C29/C29M Test Method for Bulk Density (Unit Weight) and Voids in Aggregate
C117 Test Method for Materials Finer than 75-m (No. 200) Sieve in Mineral Aggregates by Washing
C125 Terminology Relating to Concrete and Concrete Aggregates
C128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate
C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C702 Practice for Reducing Samples of Aggregate to Testing Size
C778 Specification for Sand
D75 Practice for Sampling Aggregates
ACI DocumentACI116R Cement and Concrete Terminology Available from American Concrete Institute (ACI), P.O. Box 9094, Farmington Hills, MI 48333-9094, http://www.aci-int.org.
ICS Number Code 91.100.15 (Mineral materials and products)
UNSPSC Code 30111800(Aggregates)