Effect of FTC on the interface between soil materials and asphalt concrete using a direct shear test

Noroozi, Ashkan Gholipoor; Ajalloeian, Rassoul; Bayat, Meysam

doi:10.1016/j.cscm.2022.e01632

Cited by 1 publication

(1 citation statement)

References 8 publications

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“…In order to overcome these limitations, technology has been recently developed to produce guss asphalt by applying medium-temperature additives [ 6 , 13 , 14 ] to lower the production and construction temperatures by about 20 °C to 40 °C compared to the existing ones [ 9 , 15 ]. Additionally, the control of the proper mix design and temperature of the asphalt concrete mixture can further contribute to the stronger foundation of the infrastructure system [ 16 , 17 , 18 ], promoting the application of modified HMA for multiple purposes.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Analysis of Warm Guss Asphalt Concrete for Mini-Trench Overlaying

Kim

Lee

et al. 2023

Materials

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Conventional hot mix asphalt overlaying on trench infrastructure typically necessitates extended cooling times for further works and can have adverse effects on buried components, such as electricity cables and hot water pipes. Therefore, this research aims to investigate the use of warm guss mastic asphalt (at an installation temperature of 160 °C) as an overlaying material for mini-trenches, which can reduce the cooling time required for traffic opening and improve the efficiency of the construction process. This research involved two stages: first, lab testing and related research results were used to generate the thermal conductivity and specific heat necessary for simulation work. Second, a finite element model analysis was conducted to evaluate the thermal transmission of the overlaying surface and the buried conduit based on the summer pavement temperature distribution through the Korean Pavement Research Program. Afterward, the field test bed was constructed to verify the simulation. The results indicate that the optimal thickness of the overlaying material and the concrete covering should be designed to ensure thermal durability and meet traffic opening requirements. The overlaying depth of the mini trench using warm mix guss mastic asphalt should be less than 100 mm to meet with the traffic opening time, while the thickness of the concrete covering should be designed to be more than 100 mm to ensure thermal durability. Additionally, the findings suggest that the application of warm guss asphalt could reduce the opening time by 30 min to 1 h and 25 min compared to conventional hot guss asphalt materials. When the pavement surface temperature for the traffic opening is controlled at 50 °C, the asphalt mixture requires at least 2 h to 5 h to meet the cooling criteria for traffic opening, respectively. Overall, this research confirms the potential benefits and optimal use of warm guss mastic asphalt in the construction process of mini-trenches.

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