scholarly journals Pavement-Transportation Computer Assisted Structural Engineering (PCASE) Implementation of the Modified Berggren (ModBerg) Equation for Computing the Frost Penetration Depth within Pavement Structures

2012 ◽  
Author(s):  
Alessandra Bianchini ◽  
Carlos R. Gonzalez
Keyword(s):  
Penetration Depth ◽  
Structural Engineering ◽  
Computer Assisted ◽  
Pavement Structures ◽  
Frost Penetration

scholarly journals Evaluation of In-Place Asphalt Recycling for Airfield Applications

2021 ◽  
Author(s):  
William D. Carruth
Keyword(s):  
Structural Engineering ◽  
Federal Aviation Administration ◽  
Asphalt Pavements ◽  
Computer Assisted ◽  
Military Aircraft ◽  
Potential Cost ◽  
Design Considerations ◽  
Pavement Structures ◽  
The U.S ◽  
Design Guidance

Over the last few decades, in-place recycling of asphalt pavements has seen increased use by the highway industry, primarily to take a dvantage of potential cost and logistical savings compared to conventional reconstruction. More recently, the U.S. Navy and Federal Aviation Administration have allowed recycling to be used on airfields with lighter traffic. This report contains a discussion of in-place recycling design considerations obtained from a literature review of its use in the highway industry. Observations developed from a review of airfield pavement projects that have utilized recycling is also included. A structural analysis was performed using the Pavement-Transportation Computer Assisted Structural Engineering (PCASE) tool to determine typical stiffness values that recycled layers must achieve to support various types of military aircraft traffic for different pavement structures. Overall, in-place recycling is recommended for consideration as a rehabilitati on technique for military airfield pavements, and further investigation is recommended before it is implemented it into design guidance.

scholarly journals Estimating Procedures of Sequential Changes of Frost Penetration Depth Using AMeDAS Data

1991 ◽  
Vol 31 (2) ◽  
pp. 217-225 ◽  
Author(s):  
Kiyoshi Takeichi ◽  
Hiroshi Kubo
Keyword(s):  
Penetration Depth ◽  
Frost Penetration

scholarly journals Incidents of damage to berm drainage ditches in cold region and countermeasures

2019 ◽  
Vol 265 ◽  
pp. 05019
Author(s):  
Atsuko Sato ◽  
Takahiro Yamanashi ◽  
Takayuki Adachi
Keyword(s):  
Soil Temperature ◽  
Penetration Depth ◽  
Frost Heave ◽  
Drainage Ditches ◽  
Drainage Ditch ◽  
Cold Region ◽  
Freeze Thaw ◽  
Ground Conditions ◽  
Frost Penetration

Berm drainage ditches may fail due to frost heave in cold and snowy areas like Hokkaido. Many of these failures are regarded to be caused by damage due to frost heave in the ground or freeze-thaw, but no sufficient measures are being taken, as construction guidelines and procedures do not describe any established countermeasures for the damage. Therefore, it was decided to study countermeasures by utilizing berm drainage ditches that can change form in response to frost heave, rather than by trying to reduce the level of change caused by frost heave. A drainage ditch made of flexible asphalt sheets was constructed on site, and the soil temperature, frost penetration depth, frost heave amount, and other parameters were measured. As a result, it was found that a drainage ditch made of asphalt sheets is more effective when ground conditions including moisture and temperature are severe in relation to frost heave.

Performance Evaluation of Different Insulating Materials using Field Temperature and Moisture Data

2021 ◽  
pp. 036119812110035
Author(s):  
Yunyan Huang ◽  
Mohamad Molavi Nojumi ◽  
Leila Hashemian ◽  
Alireza Bayat
Keyword(s):  
Bottom Ash ◽  
Rate Of Change ◽  
Base Layer ◽  
Insulation Materials ◽  
Test Road ◽  
Common Strategy ◽  
Control Section ◽  
Pavement Structures ◽  
Pavement Base ◽  
Frost Penetration

Including insulation layers in pavement structures has become a common strategy to minimize frost penetration in cold regions. This study investigated the performance of two different insulation materials, extruded polystyrene board and bottom ash, in a test road in Edmonton, Alberta, Canada, eight years after construction. The two insulation materials were used in a fully instrumented test road, including three insulated sections 20 m in length. The insulated sections are as follows: the first section has 1 m of bottom ash (B. Ash), the second section has a 10 cm polystyrene layer (Poly-10), and the third section has a 5 cm polystyrene layer (Poly-5). Both B. Ash and polystyrene layers were placed on top of the subgrade layer, at a depth of 70 cm from the surface. A conventional section next to these three sections was used as the control section. Volumetric water content data and temperature variation were used to analyze the influence of the insulation materials on the subgrade. It was concluded that both B. Ash and Poly-10 layers protected the subgrade from freezing. The Poly-10 section showed the lowest rate of change in subgrade temperature during the monitoring period. B. Ash and Poly-10 reduced the frost depth by 23% and 70% compared with the control section, respectively. It was concluded that Poly-10 protected the subgrade soil from freezing and excessive moisture more effectively than B. Ash; however, the temperature in the layer above the insulation layers (pavement base layer) was significantly lower during winter for the Poly-10 section.

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