01337827

Component

https://doi.org/10.3141/2240-14

http://scholar.google.com...efer&publication_year=2011

As the world becomes more urbanized, concerns over the urban heat island (UHI) are more pronounced. Increased urban temperatures have a negative affect on the natural and human environment by producing increased energy usage and smog formation. Pervious concrete pavement is one technology that may help mitigate increased urban temperatures. Temperature data from an instrumented site in Iowa and heat storage phenomena for various weather patterns are presented. The site contains both pervious concrete pavement with a solar reflectance index (SRI) of 14 and traditional concrete pavement with an SRI of 37. Leadership in Energy and Environmental Design (LEED) accepted a high SRI (>29) as one method to characterize a cool surface. Heat capacities of both systems were studied along with a sensitivity analysis of the inputs. The research supports the conclusion that even though pervious concrete may have a much lower SRI than traditional concrete made with similar materials, it can be considered a cool pavement option. In addition, daytime rainfalls combined with the internal high surface area result in significantly more removal of stored heat from the system, with a more rapid mitigation of UHI impacts and reduction in the potential for thermal shock from impervious surface runoff.

01361506

11-0959

English

pp 107-115

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167581

Print

Figures (8) ; References (16) ; Tables (3)

Concrete pavements; Heat; Heat islands; Porous pavements; Sensitivity analysis; Temperature

Heat island effect; Solar reflectance index

Iowa

Environment; Highways; Materials; Pavements; I15: Environment; I32: Concrete

TRIS, TRB, ATRI

Feb 17 2011 5:38PM

• Characterization of Interface Bond of Ultra-High-Performance Concrete Bridge Deck Overlays
• Characterization of Moisture Transport and Its Effect on Deformations in Jointed Plain Concrete Pavement
• Development of Micromechanics Models and Innovative Sensor Technologies to Evaluate Internal Frost Damage of Concrete
• Effect of Blended Fly Ashes in Mitigating Alkali–Silica Reaction
• Effect of Fiber Addition, Heat Treatment, and Preset Pressure on Mechanical Properties of Ultra-High-Strength Mortars
• Effects of Roadway Contaminants on Titanium Dioxide Photodegradation of Nitrogen Oxides
• Efforts to Improve Quality Assurance and Quality Control of Concrete in Virginia
• Experimental Study on Permeability and Mechanical Properties of Nanomodified Porous Concrete
• Heat of Hydration for Cement: Statistical Modeling
• New Approach to Calibrate the Mortar Flow Table
• Optimizing Aggregates to Reduce Cement in Concrete Without Reducing Quality
• Role of Potassium Acetate Deicer in Accelerating Alkali–Silica Reaction in Concrete Pavements Relationship Between Laboratory and Field Studies
• Thermophysical Optimization of Specialized Concrete Pavement Materials for Collection of Surface Heat Energy and Applications for Shallow Heat Storage