Determination and Zoning of Asphalts Performance Grade for Cuba According to the Superpave Methodology
DOI:
https://doi.org/10.14482/inde.38.2.620.19Keywords:
Asphalt, Behavior, Penetration, Temperatures, ZoningAbstract
Traditional asphalts classification methods are based on their penetration or viscosity. They have limitations as that it can classify different types of asphalt with the same degree, when in fact they have different behaviors. Also, the performance of the pavement in the face of variations in load and temperature is not predicted. To solve these limitations, the Superpave design method was created. Among its novelties proposes new specifications for the classification of asphalts, depending on their performance grade (PG). PG system is based on the idea that the properties of an asphalt binder should be related to the conditions under which it is being used. This involves expected climatic conditions, pavement temperature as well as ageing conditions. The aim of this work is to determine the PG grade that the asphalt in Cuba must have. For this, three calculation models and the climatic and geographic conditions of 52 meteorological stations were used. With these results a zoning map to the PG grades in Cuba were designed.
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