Sintered Calcined Clay as an Alternative Coarse Aggregate for Asphalt Pavement Construction

Abstract

The aim of this study is to search for a substitute for the natural coarse aggregate in various re-gions of the world, such as Amazon-Brazil, where this type of material is lacking. The asphalt binder AC 50/70 is mixed with an aggregate obtained from the sinterization of a calcined clay (SACC) as a possible alternative to coarse aggregate material for the construction of asphalt pavements in tropical zones. The dynamic modulus |E * | of this mixture was measured under strain control mode and in tension control mode. The results are compared with those obtained from AC 50/70 mixed with pebbles, which is currently used as the coarse aggregate in this region. For pavements that work at high temperatures, such as 40˚C, and low frequencies, the mixture with SACC appears to be a viable alternative to coarse aggregate material for the construction of as-phalt pavements in tropical zones.