Evaluación de la influencia que tiene la temperatura y el tiempo de mezcla en un asfalto modificado por vía húmeda sobre la resistencia bajo carga monotónica de una mezcla de concreto asfaltico tipo mdc-25

Abstract

In the last decade in Colombia, considerable investments have been made for the construction, conservation and paving of roads, however this process has not only had to overcome institutional, political, climatic and topographic factors but also multiple technical and technological challenges (Armesto & Díaz, 2018). In relation to the latter, the use of new techniques and technologies is frequent when it is necessary for the road surface to have a longer useful life or to have specialized properties (Casey & McNally, 2008). One of the techniques commonly used in pavement construction is the use of modified asphalt mixes. These mixtures are used in order to improve the mechanical characteristics of traditional mixtures, such as resistance to deformations due to weather and traffic factors, reduction of cracking and the susceptibility of asphalt layers to temperature variations (Riaño, 2013). In addition, it seeks to improve the response that mixtures experience when they are subjected to different load conditions (static, monotonic and / or cyclical) and of the environment (Rondón & Reyes, 2015). Despite the satisfactory performance of modified asphalt, these depend on the control of some properties, such as temperature and mixing time with the additive or polymer (Read & Whiteoak, 2003), which, since they are not considered, allow the material to be exposed to conditions that promote premature aging and stiffening of asphalt cement, altering the physical-chemical properties of the material and therefore the durability of asphalt pavements, influencing economic and environmental implications (Vargas & Reyes, 2010). Based on the foregoing, when evaluating the influence of temperature and mixing time in modified asphalt on its properties, it could help to overcome some technical challenges in the design of asphalt materials, as well as improve the quality of pavements, expanding its useful life and offering greater control of the expected properties. Finally, it is worth mentioning that the present study is justified in that it has theoretical value, practical utility, social, environmental and economic relevance. In addition, the subject of study demonstrates the versatility and wide field of action of Topographic Engineers.