Journal Published Online: 11 October 2011
Volume 40, Issue 1

Evaluation of Various Test Devices for the Measurements of Aggregates and Asphalt Mixtures’ Specific Gravity



Current test procedures for determining the density properties of aggregate and hot mix asphalt mixtures (HMA) are time consuming and subjective. The density can have significant impact on the performance of asphalt pavements. Three devices (SSDetect, CoreLok, and CoreDry) which can significantly reduce testing time were independently evaluated. Three experiments were performed to evaluate these devices. In the first experiment, specific gravity and absorption of two aggregate types (coarse sand and number 11 limestone) were conducted. The second experiment evaluated the HMA mixture bulk specific gravity (Gmb) of two mixture types (open graded friction coarse and dense graded). The last experiment examined the HMA Gmb of roadway cores. It is noted that the results from these test devices were compared to their counterpart conventional ones. Ten laboratories in Louisiana participated in this experimental program. In general, the SSDetect single operator and multilaboratories precision of both aggregate specific gravity measurements were better than that determined from American Association of State Highway Transportation Officials (AASHTO) T84. Furthermore, the results from the SSDetect device did meet the AASHTO precision criterion. Also, HMA Gmb precision values for the CoreLok were similar to that of AASHTO T166 for both mixtures. HMA Gmb values computed from results of the CoreDry device were similar to the ones determined from conventional method for the roadway cores.

Author Information

Bae, Abraham
Civil Engineering Division, Samsung Construction and Technology, KR
Mohammad, Louay
Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA, US
Cooper, Samuel
Louisiana State Univ., Baton Rouge, LA, US
King, William
Louisiana State Univ., Baton Rouge, LA, US
Pages: 8
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Stock #: JTE103592
ISSN: 0090-3973
DOI: 10.1520/JTE103592