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Document Type:Latin Dissertation
Language of Document:English
Record Number:55073
Doc. No:TL25027
Call number:‭1447695‬
Main Entry:George A. Tannoury
Title & Author:Laboratory evaluation of hot mix asphalt mixtures for Nevada's intersections - phase IIGeorge A. Tannoury
College:University of Nevada, Reno
Date:2007
Degree:M.S.C.E.
student score:2007
Page No:153
Abstract:The state of Nevada is experiencing permanent deformation problems with hot mix asphalt pavements at or near intersections. The Nevada Department of Transportation (NDOT) is currently using a Type 2C dense graded HMA mixture in most of its construction. The NDOT Type 2C mixture showed excellent rutting resistance under normal highway traffic loading, while its resistance to rutting and shoving at intersections in the hot environment of Las Vegas is questionable. The overall objective of this research study is the develop special requirements that can be used to specify an asphalt mixture that can highly resist permanent deformation at intersections in hot climate such as Las Vegas in Nevada State along with a good resistance to fatigue cracking. The objective of the phase II of the research is to evaluate the fatigue resistance of the three rut resistant mixtures identified in the phase I of the study. Additionally, the rutting resistance of the mixtures is re-evaluated according to the new mechanistic empirical pavement design guide (MEPDG). A total of three HMA mixtures were evaluated in this research. All the mixtures were designed with a polymer modified PG76-22NV binder. The southern Nevada aggregate source (Sloan) was used in this study. The laboratory evaluation assessed the resistance of the mixtures to permanent deformation and fatigue cracking using the asphalt pavement analyzer test, the repeated load triaxial test and the flexural beam fatigue test. However, the mechanistic analysis of the various mixtures shows a consistency with the laboratory test results. The ranking of the mixtures from best to worst for permanent deformation was as follows; NRM mixture, followed by CT mixture, followed by NDOT T2C mixture. However, for the CT mixture showed the best resistance to fatigue cracking followed by the NRM mixture, followed by the NDOT T2C.
Subject:Applied sciences; Civil engineering; 0543:Civil engineering
Added Entry:P. E. Sebaaly
Added Entry:University of Nevada, Reno