Abstract
Recycled concrete aggregate (RCA) is a relatively new construction material, whose applications can replace natural aggregates. To do so, extensive studies on its mechanical behavior and deformation characteristics are still necessary. RCA is currently used as a subbase material in the construction of roads, which are subject to high settlements due to traffic loading. The deformation characteristics of RCA must, therefore, be established to find the possible fatigue and damage behavior for this new material. In this article, a series of triaxial cyclic loading and resonant column tests is used to characterize fatigue in RCA as a function of applied deviator stress after long-term cyclic loading. A description of the shakedown phenomenon occurring in the RCA and calculations of its resilient modulus (Mr) as a function of fatigue are also presented. Test result analysis with the stress-life method on the Wohler S-N diagram shows the RCA behavior in accordance with the Basquin law.
Highlights
The settlement of pavement is a key factor when analyzing the quality of a road
According they account account for the material being classified as a sandy gravel
recycled concrete aggregate (RCA) studied areNatural attributed to gravels grain crushing and a proper contact zone between plunger surface
Summary
The settlement of pavement is a key factor when analyzing the quality of a road. It is important to investigate the bearing capacity of the road construction, and its cyclic-load counterpart [1].The literature concerning the latter in cohesionless soils explains how natural aggregates behave [2,3,4].most of the studies to date are carried out for short-term cyclical loadings (usually with a number of cycles below 1000) [5,6]. It is important to investigate the bearing capacity of the road construction, and its cyclic-load counterpart [1]. The literature concerning the latter in cohesionless soils explains how natural aggregates behave [2,3,4]. The purpose of conducting longer-term studies is to establish the fatigue behavior of the materials, which plays important roles when designing constructions subjected to cyclical loading [6,7,8,9]. Studies on cyclical loading of unbound soils and granular materials have been conducted previously [3,4,5]. Improvement of knowledge about the performance of RCA when subjected to cyclical loading can be essential for its successful application in road and foundation engineering
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