Standard Test Method for Density of Asphalt Mixtures in Place by the Electromagnetic Surface Contact Methods

Abstract

3.1 The test method described is useful as a rapid, nondestructive technique for determining the in-place density or relative compaction of compacted asphalt mixtures. 3.2 The test method can be used to establish the proper rolling effort and pattern to achieve the required density. 3.3 The nondestructive nature of the test allows repetitive measurements to be made at a single test location between roller passes or at multiple locations across the mat to monitor changes in density. 3.4 The density results obtained by this test method are relative. Device calibration (correlation with other test methods) is required to convert the results obtained using this method to actual density. Section 6 of this test method describes a method that has proven to be acceptable for correlation. Note 1: The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors. Note 2: The personnel and equipment used in performing this test can be evaluated in accordance with Specification D3666. Note 3: Research and evaluation of devices used in this test method has been conducted. Reference is made to “Evaluation of Non-Nuclear Gauges to Measure Density of Hot-Mixed Asphalt Pavements,” a pooled fund study, Pedro Romero, Ph.D., P.E., July 2002.