Propuesta de método de diseño de mezclas asfálticas abiertas en caliente como capa de alivio.

Abstract

This thesis describes a proposal of a methodology about the design of hot open mixtures used as a pavement recovery layer. They are designed to prevent or at least to delay the reflection of cracks and gaps on asphalt upper layers. These open mixtures have a rate of void higher than 15%, so it is especially applied on cracked pavementent for maintaining or reconstructive purposes. According to the Ecuadorian regulations "Normativa MOP-001-F-2002" and " Manual del Instituto de Asfalto MS -17" the size of the additives makes impossible to execute the current designs. That's why we have taken deferent successful experiences from Chile. They have developed a methodology called "RP" which measures the strength of the penetration related to the temperature and controlled speed. To get this goal, it is required to make a series of test tubes, each one prepared with the same amount of grain, but different amount of asphalt. The size of these test tubes is 2.5 inches thick by 4 inches diameter. They are prepared under an specific procedure based on temperature, and features of the additives, and asphalt linking. The "RP" is currently in an experimental stage.