详情

原文传递 EARLY RUTTING OF ASPHALT CONCRETE PAVEMENT UNDER HEAVY AXLE LOADS IN HOT DESERT ENVIRONMENT: CASE HISTORY.

题名：	EARLY RUTTING OF ASPHALT CONCRETE PAVEMENT UNDER HEAVY AXLE LOADS IN HOT DESERT ENVIRONMENT: CASE HISTORY.
作者：	Vallerga-BA; Tayebali-AA; Monismith-CL
关键词：	RUTTING-; ASPHALTIC-CONCRETE; DESERTS-; CASE-HISTORIES; AXLE-LOADS; MARSHALL-MIX-DESIGN-METHOD; ASPHALT-CONTENT; HVEEM-MIX-DESIGN-METHOD; CREEP-TESTS; MECHANISTIC-ANALYSIS; STRATEGIC-HIGHWAY-RESEARCH-PROGRAM
摘要：	A case study of early rutting of an asphalt concrete pavement under heavy axle loads in a hot desert environment is presented. A section of four-lane divided Dubai-Hatta Highway in the Dubai Municipality of the United Arab Emirates experienced a 13-mm (0.51-in.) rutting in a mere 10-month period. Review of the project documents indicated that the pavement section under consideration was properly designed and constructed by a mix design procedure that used the Marshall test equipment applicable to heavy-duty asphalt pavements. By this procedure a design asphalt content of 4.3% by the weight of mix was selected. During the course of the investigation the design asphalt content was confirmed by the Hveem mix design procedure. However, neither of these conventional mix design methods indicated any potential for rutting; moreover, the method of laboratory test specimen fabrication did not produce compaction levels representative of those obtained in situ under the actual traffic loading. On the basis of the results of this investigation the most probable cause for premature rutting was attributed to axle loadings that exceeded the loading conditions for which the Marshall and Hveem mix design criteria have empirically been developed. Creep testing appeared to better characterize asphalt concrete in a more fundamental manner with a potential use in mechanistic analysis to estimate the propensity of the mix for rutting. Its limited use in the study confirmed that the rutting that did occur was to be expected for the existing unconventional loading conditions for the environment in which the pavement was located. Although not performed in the present study, an improved analysis method developed by Strategic Highway Research Program Project A-003A researchers to evaluate rutting is briefly described.
总页数：	Transportation Research Record. 1995. (1473) pp25-34 (1 Phot., 8 Fig., 3 Tab., 6 Ref.)
报告类型：	科技报告