Affiliation:
1. Department of Civil Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
Abstract
The ground surface of green parks in arid and semi-arid areas may not be comfortable at specific times during the day and night due to the sun and the rate at which the subsoil gains or loses heat. Knowledge of the subsurface soil’s thermal properties can provide designers with convenient and comfortable settings. Design focus is generally directed toward stability, density, and hydraulic conductivity. An assessment of the thermal properties of clay–sand mixtures of 10%, 20%, and 30% clay content is conducted. The proposed clay–sand layers are subjected to three different thermal gradients of 30, 20, and 10 degrees of magnitude. The profile of temperature changes was monitored using 5TE sensors and data loggers. The mixtures were also subjected to cooling at room temperature. The results indicate that the clay type and the clay content govern the response of subsurface clay–sand liners to temperature gain and loss. Two field sections with clay–sand layers of 15% and 20% clay were examined for temperature changes over an extended period. In winter, green areas rich in clays were found to keep heat for several hours and provide relatively warm evenings. In summer, the mixture retains a cool temperature for some time during the day.
Funder
Researchers Supporting Project of King Saud University
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference26 articles.
1. Dafalla, M. (2017, January 23–28). Response of subsurface soils covered by sand clay liners to temperature variations. Proceedings of the 19th EGU General Assembly, EGU2017, Vienna, Austria.
2. Antarctic Bottom Water temperature changes in the western South Atlantic from 1989 to 2014;Johnson;J. Geophys. Res. Ocean.,2014
3. A generalized thermal conductivity model for soils and construction materials;Konrad;Can. Geotech. J.,2005
4. Soil Thermal Conductivity Effects of Density, Moisture, Salt Concentration, and Organic Matter;Reeder;Soil Sci. Soc. Am. J.,2000
5. Farouki, O.T. (1986). Series on Rocks and Soil Mechanics, Trans Tech Publications.
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