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Significance and Use
The procedure in this practice for estimating the percentage of coated particles after varying mixing times is used to establish the least mixing time required to produce satisfactory coating for a given set of conditions. This procedure can also be used to sample cold mixtures from stockpiles to determine that satisfactory coating has been retained in the stockpile.
This procedure is used with hot-mixed, hot-laid bituminous paving mixtures or with cold-mixed, cold-laid bituminous paving mixtures such as specified in Specification D 4215.
Note 1—Even when a paving mixture complies with the “percent of coated particles” that may be specified, there is no assurance that the asphalt cement is uniformly distributed throughout the mixture.
This practice should not be used for acceptance/rejection by owner agencies.
1.1 This practice provides an estimate of the degree of particle coating in a bituminous-aggregate mixture on the basis of the percentage of coarse particles classified as being completely coated.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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 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.
D8 Terminology Relating to Materials for Roads and Pavements
D979 Practice for Sampling Bituminous Paving Mixtures
D995 Specification for Mixing Plants for Hot-Mixed, Hot-Laid Bituminous Paving Mixtures
D3665 Practice for Random Sampling of Construction Materials
D4215 Specification for Cold-Mixed, Cold-Laid Bituminous Paving Mixtures
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
ICS Number Code 91.100.50 (Binders. Sealing materials); 93.080.20 (Road construction materials)
UNSPSC Code 30121500(Bituminous derivatives); 30111800(Aggregates)