September 25, 2008

City of Phoenix Park-n-Ride Solar Facility

Solar panels were mounted on the top of a shaded parking canopy. These panels generate electricity to power the security guard station as well as provide lighting for the parking lot. The NCE installed temperature sensors to record the temperatures above and below the canopies and at the surface of the exposed and non exposed […]

September 25, 2008

Pavement Temperature Modeling

Objective Create a computation model to estimate the surface and subsurface temperature within multi-layered pavement systems. Methodology Using fundamental heat transfer principles to create a one dimensional finite difference model. Used data collected from testing sites to calibrate the model for different weather conditions. Inputs required: meteorological information (3 day wind speed, solar radiation, air […]

September 25, 2008

Albedo of Urban Infrastructure

Objective Determine correlations between albedo (solar reflectance), pavement material type and age for roads, parking lots and connector streets located with in an urban area. Methodology Measure albedo at over 40 locations around the City of Tempe, Arizona.  Collect information about each surface (traffic volumes, age, material type).  Analyze results to determine whether correlation and […]

September 25, 2008

Cylindrical Thermal Conductivity Testing Apparatus

Objective Measure thermal conductivity, an important material property for thermal analysis, using a cylindrical sample geometry. Methodology Developed a new test procedure and apparatus that measures the thermal conductivity of insulation materials such as pavements and other building materials. Determine accuracy and repeatability of the test apparatus through extensive statistical testing. Significance Accurate thermal property […]

September 25, 2008

Monitoring Temperatures in Highway Pavements

Objective Quantify the temperature profile within two different highway material designs. Methodology Install temperature sensors at varying depths in the interstate highway. One section is made of full depth Portland Cement Concrete and the other a Concrete with Rubberized Asphalt Friction Course Overlay. Collect data for several months.  Measure the thermal properties of the high […]

September 25, 2008

Evaluating Thin Whitetopping Test Section in Arizona

Objective Implement a new concrete mix design that utilizes recycled plastic fibers for added strength and durability. Methodology Construct an in service highway exit ramp using several variations of the fiber modified concrete. Conduct several types of mechanical and thermal tests to determine several important properties of each mix. Monitor that subsurface temperature and field […]

September 25, 2008

Pervious Concrete Construction Testing

Objective To better understand the mechanical, thermal and storm water performance of pervious concrete located in a hot arid climate. Methodology Test the compressive and flexural strength of pervious concrete samples during and after lot construction. Install temperature and moisture sensors within a pervious concrete parking lot system for several months. Significance This was the […]

September 25, 2008

Cool Roof Energy Study

Objective Evaluate the economic and environmental performance of a cool roof renovation project of a large commercial facility located in North Phoenix. Methodology Monitor roof surface and ceiling temperatures, meteorological information and building energy use data. Develop computer energy model to run simulations to estimate the changes in building energy use. Compare the data collection […]

September 25, 2008

U-haul Permeable Parking Lot Evaluation

Objective Determine the infiltration and urban heat island mitigation performance of several design variations of a GravelPave2™ at large commercial parking lot in Gilbert, Arizona. Methodology Constructed eight hydraulically isolated, 0% slope, sections each containing different designs variations that meet the 100 year 2 hour storm event infiltration requirements. Measure and monitor infiltration rates within […]

June 11, 2007

ASU Art Museum visitor parking lot

Location: Tempe, AZ Status: Completed Parking is at a premium at ASU, especially at the ASU Art Museum. So, when what little parking we have is further reduced by flooding, the problem escalates. The NCE is working with CEMEX USA, Progressive Concrete Works, Inc. and the Arizona Cement Association to replace a conventional asphalt parking […]