Cómo citar / How to cite H. A. Rondón-Quintana, C. F. Urazán-Bonells y S. B. Chaves-Pabón, "Influencia de la temperatura de compactación sobre la resistencia de un material granular estabilizado con asfalto en caliente tipo MGEA_A", Tecno Lógicas, vol. 18, no. 34, pp. 51-62, 2015. ResumenEn el artículo se presentan los resultados de una fase experimental cuyo principal objetivo fue evaluar la influencia de la temperatura de compactación sobre la resistencia mecánica y la susceptibilidad al agua de un material granular estabilizado con asfalto en caliente (MGEA). Lo anterior, debido a que en climas templados o de baja temperatura, se ha reportado en obra disminución de la temperatura de compactación con respecto a la óptima de laboratorio de hasta 30°C. Adicionalmente, las especificaciones técnicas de construcción no recomiendan un rango de temperaturas de compactación para el control de este material en proyecto viales. Lo anterior genera, que en muchas ocasiones, estos materiales sean compactados de manera empírica con temperaturas que tal vez no sean las adecuadas. Las mezclas fueron fabricadas utilizando dos cementos asfálticos (CA 60-70 y CA 80-100) y fueron compactadas bajo temperaturas de 90, 100, 110 y 120°C, siendo esta última la óptima de referencia. Los ensayos ejecutados fueron el Marshall, módulo resiliente, deformación permanente y tracción indirecta sobre muestras secas y sumergidas en agua. Como conclusión general se reporta, que la disminución de la temperatura de compactación de la mezcla MGEA, genera una disminución notable en su resistencia bajo carga monotónica y cíclica e incrementa el daño por humedad. Palabras claveMaterial granular ligado con asfalto en caliente, temperatura de compactación, resistencia bajo carga monotónica y cíclica, daño por humedad, MGEA. AbstractThe influence of compaction temperature on the mechanical resistance and susceptibility to water of a bound granular material with asphalt cement (called MGEA) was evaluated in laboratory. The above, because in temperate climates or low temperature, has been reported in some road projects, lowering the temperature of compaction with respect to the laboratory optimum to 30°C. Additionally, the technical construction specifications not recommend a range of compaction temperatures for the control of this material in road projects. This generates, that these materials are compacted empirically with temperatures that may not be appropriate. Two asphalt cements (AC 60-70 and AC 80-100) were used to prepare the MGEA mixtures. The compaction temperatures used were 105, 115, 125 and 135°C. Marshall, resilient modulus, permanent deformation and indirect traction tests were performed. The decrease of the compaction temperature produces a remarkable decrease in resistance under monotonic and cyclic loading, and increases moisture damage of the MGEA mixture tested. KeywordsBound granular material with asphalt cement, compaction temperature, resistance under monotonic and repeated loading, moisture damage, MGEA.Influencia de la temperatur...

It is generally assumed that there is a statistically valid correlation between the length of a roadway network, in addition to other factors such as its classification and/or average travel speed, and economic indicators such as Gross Domestic Product (GDP) and the Municipal Relative Weight (MRW), considering that the roadway network and transport development generate economic development in a region. This study reports the results of correlating several variables which are economic indicators of roadway networks, both at a municipal and a departmental level, in Colombia; it was concluded that at the level of municipalities, there is no valid correlation between MRW, as a dependent variable, and the average travel speed and the sum of the length (in kilometers) of the roadways that connect villages, as independent variables. There was a correlation with neither the MRW as an independent variable nor the traveling distance and time for each municipality concerning the capital city of each respective department. Finally, it was found that the department agribusiness GDP was associated with the length of the tertiary roadway network and with the primary network, with an R2 of 0.7. This study concludes that activities in rural zones are the ones that generate the greatest impact on roadway investment within a region.