Modeling of Cyclic Strength for the Asphalt Concrete Considering Damage Accumulation

Abstract

Abstract:The expression is obtained for determination of cyclic tensile strength for asphalt concrete, which considers damage accumulation and history of loading, using the long-term strength curve for asphalt concrete obtained according to the test results of more than 110 samples to failure at stresses from 0.05 to 0.31 MPa and by introduction of damage kernel in this paper. Cyclic strength depends on the stress, parameters of long-term strength, frequency of loading, durations of loading and relax periods, and ratio of loading period to the long-term strength. Evaluation of accuracy for the obtained expression for the cyclic strength has been performed by comparison with the results of a series for experimental tests of asphalt concrete samples at a temperature of 22 • C and cyclic loading conditions. The stress is 0.31 MPa, and the durations of loading and relax periods are 5 and 60 s, respectively. Calculations performed with the obtained expressions at real road conditions (the stress is 0.31 MPa, and the durations of loading and relax periods are 0.1 and 9.9 s respectively) showed the possibility of its use for the prediction of fatigue (multicyclic) strength of an asphalt concrete pavement for a highway.

Modeling the Influence of Surface Free Energy on Moisture Damage of Recycled Asphalt Concrete

“…Comparison of the calculation results performed under the obtained expression, and experimental tests showed that the obtained expression describes satisfactorily the cyclic tensile strength of the asphalt concrete. It was concluded that the obtained expression for determination of the cyclic tensile strength for the asphalt concrete can be used for the prediction of fatigue strength of the asphalt concrete pavement, Iskakbayev et al, (2017).…”

Modeling of Hereditary Materials Relaxation by Abel Kernel

“…Creep and relaxation are important characteristics of hereditary materials. The creep has been studied for an asphalt concrete and other materials in the works [5][6][7][8][9][10][11][12][13]. The present work is devoted to the modeling of the process for relaxation of a number of hereditary materials.…”

Computer Modeling of Creep for Hereditary Materials by Abel’s Kernel

“…In Kazakhstan complex experimental and theoretical research for deformation and strength of asphalt concretes is carried out [9][10][11][12][13][14][15][16][17][18][19][20]. The current paper is continuation of the above works and it considers the matters of computer modeling for creep procedure of hereditary materials using nonlinear integral equation of Yu…”