@inproceedings{42c4d4ea3ba741a0830c7aefff96ab08,
title = "Laboratory investigation of asphalt pavements with low density and recommendations to prevent density deficiency",
abstract = "In most USA asphalt construction projects the goal of compacting a hot-mix asphalt (HMA) layer is to achieve the optimum density which is 92% of the maximum specific gravity (Gmm) of the asphalt mixture. However, this level of density is not always achieved. This paper evaluates the effect of field compaction deficiencies on the HMA durability through laboratory testing. HMA samples were collected from construction sites in the United States. A series of laboratory tests were conducted to compare the performance of HMA mixtures at their actual in-place density as well as the desired density of 92% of Gmm. The statistical analysis on the results showed that the performance of the pavements could significantly improve by eliminating the deficiencies in their in-place densities. Moreover, the compactibility of the mixtures was investigated using the compaction data from the Superpave gyratory compactor. Compaction characteristics of the mixtures were compared to a control mixture, and the results showed that the shortage in the binder content of the mixtures could be a major factor which may have caused the density deficiencies. Furthermore, the effect of higher-than-optimum binder content was evaluated on the compactibility of the control mixture.",
keywords = "Air void content, Compactibility, Fatigue, Hot-mix asphalt, In-place density, Pavement materials, Performance test, Rutting, Superpave gyratory compactor",
author = "Alireza Zeinali and Blankenship, {Phillip B.} and Anderson, {R. Michael} and Mahboub, {Kamyar C.}",
year = "2013",
doi = "10.4028/www.scientific.net/AMR.723.128",
language = "English",
isbn = "9783037857403",
series = "Advanced Materials Research",
pages = "128--135",
booktitle = "Innovation and Sustainable Technology in Road and Airfield Pavement",
note = "null ; Conference date: 14-07-2013 Through 18-07-2013",
}