01625616

Component

A laboratory fatigue test was conducted to investigate the influence of different combinations of traffic load and temperature variation (thermal load) on the performance of geotextiles for retarding reflective cracking in asphalt pavements. Four different ratios of traffic load and thermal load were considered in the test to simulate different actual load amplitudes. Three different frequencies of thermal load under the constant load ratio were also considered to simulate different cycle time of temperature variation. The tensile effect of traffic load and thermal load was simulated by two fixed vertical loads with different frequencies and amplitudes in the test. Three dimensional finite element models were developed to study the relationship between the load applied to the test and the actual load. Finally, this paper proposed several evaluation indexes based on crack opening to evaluate the contribution of geotextiles for the entire test. Results indicate that geotextiles can delay the initiation and propagation of crack in the evaluated cases. Better performance of geotextiles is obtained under load conditions with higher ratios and frequencies of thermal load.

This paper was sponsored by TRB committee AFS70 Standing Committee on Geosynthetics. Alternate title: Influence of Combined Load on the Performance of Geotextiles as Anti-reflective Cracking System in Asphalt Pavements.

01618707

17-04714

English

17p

2017

Transportation Research Board 96th Annual Meeting

Digital/other

Figures; References; Tables

Asphalt pavements; Fatigue tests; Finite element method; Geotextiles; Mathematical models; Reflection cracking; Traffic loads

Thermal loads

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2017 Paper #17-04714

TRIS, TRB, ATRI

Dec 8 2016 11:48AM