Evaluation of the complex dynamic modulus of asphaltic concretes manufactured with construction and demolition waste (CDW) aggregates

摘要

Currently, there is an overexploitation of natural resources worldwide due to the need to build various types of civil engineering infrastructure, such as buildings, bridges, housing and, in particular, roads. A large number of countries, including Mexico, additionally do not apply adequate treatment to the material resulting from the demolition of this type of work. Both situations generate significant environmental damage and contribute to the non-sustainability of the road construction sector. This research assesses the linear viscoelastic (LVE2) behavior of asphalt concrete specimens made with different combinations of mineral aggregate and construction and demolition waste (CDW). Complex dynamic modulus tests were performed in compression on cylindrical samples at different temperatures and frequency loading. The ANOVA analysis of test results indicate that the stiffness of the different asphalt concretes evaluated, represented by the complex dynamic modulus, tends to decrease with the temperature and increase with load frequency, which are typical of materials with viscous characteristics. The stiffness of the asphalt concrete evaluated does not show significant changes as the CDW aggregate content varies.