01456087

Component

https://doi.org/10.3141/2290-21

http://scholar.google.com...pnow&publication_year=2012

Self-cleaning, air-purifying pervious concrete pavement is a promising technology that can be constructed with air-cleaning agents with superhydrophilic photocatalyst capabilities, such as titanium dioxide. Although this technology has the potential of supporting environment-friendly road infrastructure, its effectiveness depends on a number of design and operational parameters that need to be evaluated. The objective of this study was to evaluate the mechanical, environmental, and mix design parameters that influence the performance and effectiveness of photocatalytic pervious concrete pavement. To achieve this objective, an experimental program was conducted in which the effects of relative humidity level, pollutants’ flow rate, and mix design parameters, including void ratio and depth of the photocatalytic layer, were investigated. Mechanical performance tests included porosity, unit weight, permeability, and compressive strength. The environmental efficiency of the samples to remove nitrogen oxides (NOx) from the atmosphere was measured in the laboratory. Results of the experimental program showed that increasing the depth of the photocatalytic layer increased NOx reduction efficiency. In addition, NOx removal efficiency decreased with the increase in the pollutant flow rate and increased with the increase in ultraviolet light intensity.

01455586

12-1187

English

pp 161–167

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309223300

Print

Figures; Photos; References; Tables

Air voids; Coatings; Concrete pavements; Mechanical properties; Mix design; Nitrogen oxides; Porous pavements

Efficiency; Photocatalysis; Titanium dioxide

Design; Environment; Highways; Materials; Pavements; I15: Environment; I22: Design of Pavements, Railways and Guideways; I32: Concrete

TRIS, TRB, ATRI

Dec 4 2012 11:06AM

• Can Soy Methyl Esters Improve Concrete Pavement Joint Durability?
• Development of Laboratory Testing Protocol for Rapid-Setting Cementitious Material for Airfield Pavement Repairs
• Development of Precision Statement for Concrete Surface Resistivity
• Drying Shrinkage Behavior of Mortars Made with Ternary Blends
• Durability of Pavement Concretes Made with Recycled Concrete Aggregates
• Effect of Recycled Concrete Aggregate Properties on Mixture Proportions of Structural Concrete
• Effects of Deicing Salt Solutions on Physical Properties of Pavement Concretes
• Effects of Sample Preparation and Interpretation of Thermogravimetric Curves on Calcium Hydroxide in Hydrated Pastes and Mortars
• Field Evaluation of Ability of Photocatalytic Concrete Pavements to Remove Nitrogen Oxides
• Fingerprinting of Chemical Admixtures in Fresh Portland Cement Concrete by Portable Infrared Spectrometer
• Freeze–Thaw Durability and Salt Scaling Resistance Assessment of Portland Cement Concrete Composite Pavement
• Lowering the Carbon Footprint of Concrete by Reducing Clinker Content of Cement
• Performance of Concrete Incorporating Stone Industry Waste as Aggregates
• Performance of Slag Cement in Hydraulic Cement Concrete
• Predicting Cement–Admixture Incompatibilities with Cement Paste Rheology
• Quantification of Reduction of Nitrogen Oxides by Nitrate Accumulation on Titanium Dioxide Photocatalytic Concrete Pavement
• Reducing Curing Requirements for Pervious Concrete with a Superabsorbent Polymer for Internal Curing
• Reducing Set Retardation in High-Volume Fly Ash Mixtures with the Use of Limestone: Improving Constructability for Sustainability
• Strength and Transport Properties of Concretes Modified with Coarse Limestone Powder to Compensate for Dilution Effects
• Surface Resistivity Measurements Evaluated as Alternative to Rapid Chloride Permeability Test for Quality Assurance and Acceptance