Evolution of asphalt binder stiffness during fatigue loading and rest periods and its impact on fatigue life

被引：10
|
作者：
de Oliveira, Leticia Sousa [1 ]
de Albuquerque Lima Babadopulos, Lucas Feitosa [2 ]
Soares, Jorge Barbosa [1 ]
机构：
[1] Fed Univ Ceara Fortaleza, Dept Transportat Engn, Fortaleza, Ceara, Brazil
[2] Fed Univ Ceara Fortaleza, Dept Struct Engn & Civil Construct, Fortaleza, Ceara, Brazil
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 144卷
关键词：
Fatigue tests; Rest periods; Stiffness decrease; Self-healing; Reversible phenomena; BITUMINOUS MIXTURES; DAMAGE; RECOVERY; CONCRETE;
D O I：
10.1016/j.ijfatigue.2020.106041
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Fatigue in asphalt materials is evaluated in the laboratory through continuous cyclic loading tests, whereas field loading in pavements is intermittent. Further studies on the effect of rest periods (RPs) on asphalt binder stiffness and fatigue life is of paramount importance. This paper investigates three 50/70 penetration grade binders with respect to their stiffness and fatigue properties. Fatigue was tested at 19 degrees C using three strain amplitudes. Tests with recovery time (5 RPs of 4 h each) were performed. Results show stiffness recovery during rest, however such recovery is not associated with an increase in the number of cycles to failure.
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收藏
页数：9
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