1. Scope

1.1 These test methods describe 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: ( ) 2.36 mm (No. 8) to 1.18 mm (No. 16); ( ) 1.18 mm (No. 16) to 600 [mu]m (No. 30); and ( ) 600 [mu]m (No. 30) to 300 [mu]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 problems, 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.

ASTM Standards

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 Document

Keywords

angularity; fine aggregate; particle shape; sand; surface texture; void content;

ICS Code

ICS Number Code 91.100.15 (Mineral materials and products)

DOI: 10.1520/C1252-03

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