A novel composite thermal insulation system for concrete bridge box girder and its influence

Sun, Weigang; Li, Yiqiang; Zhao, Weigang

doi:10.1016/j.csite.2022.102130

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…In this section, the theory of heat transfer, finite element analysis, model construction, physical properties, initial conditions, boundary conditions, and analysis methods are respectively described. ABAQUS, a finite element analysis program, was used to analyze the effect of the heat of the guss asphalt mixture on the temperature change of the pavement and buried pipe [ 2 , 25 , 26 ].…”

Section: Methodsmentioning

confidence: 99%

“…As a result, the aerial cables in the downtown area are crowded, impairing the urban aesthetics, threatening traffic safety with the installation of aerial cables that do not meet regulations, and increasing the risk of accidents [ 1 ]. Therefore, demand for undergrounding new and existing communication cables is continuously increasing due to the problem of overcrowding of aerial cables, disaster prevention, and the improvement of urban aesthetics [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%