Abstract
The modulus value of bituminous materials is a key factor in the design of road pavements and the estimation of their life service. This parameter can be measured in laboratory but, unfortunately, this requires the deterioration of the pavement so as the consumption of time and resources. Therefore, this study analyses the feasibility of using impact resonance frequency tests as an alternative to traditional methods for determining the dynamic modulus of bituminous mixtures. The sensitivity of this technique has been studied by analyzing its repeatability and reproducibility, studying the variations in the values measured by modifying the dimensions of the specimens, test temperatures and types of mixture tested. In addition, this non-destructive technique has been compared with other traditional tests used to determine the elastic properties of bituminous materials. The results show that this test could be an interesting tool to characterize the properties and damage state of asphalt layers.
Highlights
RESUMEN: Análisis de la sensibilidad del ensayo de resonancia por impacto como herramienta para determinar las propiedades elásticas de materiales bituminosos
Values between 8 and 9 can be considered as the most appropriate to take the measurements, and they were obtained at a temperature of approximately 5°C in the case of the mixture manufactured with the BM3c, and approximately 10°C in the case of the mixture manufactured with the B35/50
A comparison of the two types of mixtures reveals that the mixture manufactured with the B 35/50 has a better quality of signal than that manufactured with the BM3c
Summary
RESUMEN: Análisis de la sensibilidad del ensayo de resonancia por impacto como herramienta para determinar las propiedades elásticas de materiales bituminosos. An increase in traffic volumes and loads per axel in roads and highways (primarily due to the globalization of commerce), has led to the need to optimize construction and maintenance works This is the main reason why new elements such as polymers, crumb rubber or thermal power plant ashes (1, 2) are being incorporated into bituminous mixtures, in order to achieve more durable pavements that have minimal impact on economic and social activities. Work was aimed at exploring the possibility of estimating the damage in asphalt mixes (17, 19)
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