Análise do comportamento da pintura de ligação por meio dos ensaios de resistência ao cisalhamento dinâmico e estático considerando diferentes tipos de emulsões, temperaturas e taxas de aplicação

Abstract

The bonding layer of pavements ensures the integrity and connection between their layers. This connection forms a monolithic structure that allows uniform deformation conditions. Additionally, it keeps the layers bonded even under external forces, thereby preventing slippage or premature fatigue cracking. This contributes directly to increasing the pavement's service life. Currently, several tests are available to evaluate bonding properties, such as Leutner, ASTRA, LPDS, and FDOT, with the direct shear strength test using the Leutner method being the most commonly used. It is known that this condition is affected by various factors and that pavements are subjected to dynamic rather than static loading. This study investigated the adhesion of pavement layers using different types of asphalt emulsions and temperatures through dynamic and static shear strength tests. A factorial design was carried out for two types of flexible pavements, involving independent and dependent variables influencing bond behavior. Statistical inferences using ANOVA showed that temperature variation was the only variable with a significant effect. Among the emulsions studied (RR-1C, RR-2C, RC- 1CE), RR-1C demonstrated the best performance. Subsequently, dynamic tests were performed on the interfaces of pavements PAV01 and PAV02 with the RR-1C emulsion applied at 0.25 l/m² and at temperatures of 25°C, 35.5°C, and 46°C. At 25°C, the results indicated that PAV02 exhibited slightly higher resistance than PAV01. At 35.5°C, both pavements showed reduced durability, although PAV02 remained more robust. At 46°C, PAV02 demonstrated greater vulnerability, with a sharper decline in resistance compared to PAV01, suggesting that PAV02 is more effective at low and intermediate temperatures, while PAV01 performs better under extreme temperatures. Finally, upon analyzing the results and evaluating the portal test, it can be concluded that the data presentation and trends are consistent. Both static and dynamic tests yielded parameters similar to those described in national and international literature, confirming the reliability and relevance of the presented data and the methodology employed.