Estimation of the Fatigue Endurance Limit of HMAC for Perpetual Pavements

武汉理工大学学报-材料科学版(英文版), 2010, 25(4): 645-649. doi: 10.1007/s11595-010-0062-7

^1, , ^2, , ^3, , ^4,

1.Road and railway engineering,Faculty of Civil Engineering and Geosciences,Delft University of Technology,Delft 2628 CN,The Netherlands

2.Road and railway engineering,Faculty of Civil Engineering and Geosciences,Delft University of Technology,Delft 2628 CN,The Netherlands

3.Road and railway engineering,Faculty of Civil Engineering and Geosciences,Delft University of Technology,Delft 2628 CN,The Netherlands

4.Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education,Wuhan University of Technology,Wuhan 430070,China

Estimation of the Fatigue Endurance Limit of HMAC for Perpetual Pavements

LI Ning ^1, , AAA Molenaar ^2, , MFC van de Yen ^3, , WU Shaopeng ^4,

1.Road and railway engineering,Faculty of Civil Engineering and Geosciences,Delft University of Technology,Delft 2628 CN,The Netherlands

2.Road and railway engineering,Faculty of Civil Engineering and Geosciences,Delft University of Technology,Delft 2628 CN,The Netherlands

3.Road and railway engineering,Faculty of Civil Engineering and Geosciences,Delft University of Technology,Delft 2628 CN,The Netherlands

4.Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education,Wuhan University of Technology,Wuhan 430070,China

Keywords： fatigue endurance limit

A simplified procedure was described to estimate the FEL of three kinds of hot-mix asphalt concrete(HMAC)without doing any fatigue tests.The procedure required two fundamental properties of HMAC,tensile strength under different temperatures and strain rates,and flexural stiffness under different stain levels.This information can reliably be obtained in simple tests,which are the monotonic uniaxial tensile test(MUTT)and the four-point bending test(FPBT).A new parameter,the initial stress ratio Rinitial,was introduced to connect these two tests,which was defined as the ratio of applied initial stress and tensile strength of the specimen.At last the FEL can be expressed as a function of the initial flexural stiffness,frequency and temperature.Obviously,this procedure has the potential to be very useful in view of long-life pavement design and time consuming traditional fatigue tests.

参考文献

[1]	DAVID H. TIMM;DAVID E. NEWCOMB .Perpetual pavement design for flexible pavements in the US[J].The international journal of pavement engineering,2006(2):111-119.

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Estimation of the Fatigue Endurance Limit of HMAC for Perpetual Pavements

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