ABSTRACT
With the aim of improving the structural performance of the base of asphalt pavements, the use of soil-cement can be an appropriate solution providing high bearing capacity and resistance to permanent deformations. However, these improved granular layers can present cracking problems due to the brittleness and the shrinkage produced by the hydration of the cement, reducing their capacity to absorb deformations and resulting in cracks that can be reflected in the upper layers of the pavement (which would accelerate the degradation of the whole infrastructure). In this context, the present paper focuses on the study of soil-cement manufactured with reclaimed asphalt pavements (RAP), as a substitutive of natural aggregates that would improve its ductility. This solution aims to provide a more sustainable and high-performance granular layer, reducing the consumption of raw materials while increasing the mechanical performance of the base layer. For this purpose, a laboratory study (that includes tensile and compression modulus tests, tensile and compression strength tests, and fatigue cracking test) was carried out using different RAP and cement content.
