01552936

Component

https://doi.org/10.3141/2433-05

A common problem in cold regions is the penetration of frost into susceptible subgrade soils. This study investigated the application of bottom ash in comparison with polystyrene boards as an insulation layer at a test road in Edmonton, Alberta, Canada. The adjacent normal section was used as the control section. All sections were instrumented at various depths to monitor temperature variation. On the basis of temperature measurements in the base and subgrade layers from October 2012 to June 2013, frost depth and freezing and thawing periods were analyzed for each section. R-values for thermal resistivity were calculated for each layer, considering its thickness and thermal properties, and were used for justifying and comparing the temperature trends. R-values were established at 1.4 and 16.7 m² ⋅ °C/W for the bottom ash and polystyrene board, respectively. The base layer in the polystyrene section experienced higher temperatures in the summer and lower temperatures in the winter in relation to the bottom ash and control sections. On the basis of temperature measurements at depths of 1.61 to 3.27 m, the subgrade in the polystyrene section showed the lowest variation in temperature with respect to time and depth, followed by the bottom ash and then the control section. This behavior indicated that the insulation layers obstructed the heat transfer between the surface and the lower layers. The use of polystyrene boards and bottom ash as insulation materials decreased the frost depth by at least 40% and 28%, respectively, compared with the control section.

01552761

14-3038

English

pp 39–47

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309295215

Print

Figures (8) ; References (12) ; Tables (1)

Bottom ash; Field studies; Freeze thaw durability; Frost; Insulating materials; Pavement layers

Edmonton (Canada)

Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I33: Other Materials used in Pavement Layers

TRIS, TRB, ATRI

Jan 27 2014 3:03PM

• Assessing Transferability of Highway Safety Manual Crash Prediction Models to Data from Italy
• Cold Region Applications for In-Place Inclinometers Based on Microelectromechanical Systems Technology: Four Evaluation Case Studies
• Collecting Decision Support System Data Through Remote Sensing of Unpaved Roads
• Discrete Element Modeling of Effect of Moisture and Fine Particles in Lightweight Deflectometer Test
• Economic Impact of Closing Structurally Deficient or Functionally Obsolete Bridges on Very Low-Volume Roads
• Effect of Matric Suction on Resilient Modulus for Compacted Recycled Base Course in Postcompaction State
• Evaluation of Bearing Capacity of Low-Volume Roads in Minnesota
• Evaluation of Unknown Foundations of Bridges Subjected to Scour: Physically Driven Artificial Neural Network Approach
• Generating Hourly Climatic Data for Pavement Design from Available Weather Information
• Investigating Safety Impact of Edgelines on Narrow, Rural Two-Lane Highways by Empirical Bayes Method
• Model for Schedule Risk Evaluation in Subsurface Explorations
• New Procedure for Selecting Chemical Treatments for Unpaved Roads
• Relationship Between Traffic Loading and Environmental Factors and Low-Volume Road Deterioration
• Seismic Waveform Tomography at Test Site with Open Chimneys