Cool pavements—reflective coatings or additives applied to concrete and asphalt—could have an unfortunate byproduct.
New research conducted in Los Angeles’ San Fernando Valley examined the impact of pavements that had been mixed with a reflective additive. The finding: reflected energy from sunlight can make people walking on the pavement significantly hotter.
According to a researcher’s sensors, on a hot, dry day, a pedestrian could feel more than 7 degrees warmer on a “cool pavement,” compared to how he or she would feel on a standard blacktop. The standard dark pavement stores some of the energy and converts it into heat, while the cool pavement reflects more energy.
Studies support the notion that reflective surfaces can reduce the heat island effect by a few degrees in urban areas, but at least in the brightest times of the day, they can make people walking on them feel hotter. Since 2015, Los Angeles has covered about 50 city blocks in reflective coatings and seals, and plans to continue with this initiative.
Related Stories
| Dec 1, 2011
More stringent efficiency codes driving growth in green building industry
Thanks partly to upgraded building codes, the building energy efficiency market will soar more than 50% between now and 2017 to $103.5 billion, according to Pike Research.
| Dec 1, 2011
Safety tracking tool helping prevent injuries at World Trade Center site
Since putting in place their Safety Management Systems Tracking Tool three years ago, risk managers for the World Trade Center project in New York say they've seen workplace injuries, reported hazards, and workers compensation claims decline.
| Dec 1, 2011
OSHA releases new construction safety videos
OSHA released new safety videos to offer both employers and workers brief, easy-to-understand education about construction safety.
| Dec 1, 2011
GSA Region 5 BIM standards could set national agenda in government contracting
Learning how the GSA wants to work with contractors using Building Information Models (BIM) will dramatically improve your odds of winning federal work.
| Nov 23, 2011
Fenestration council seeks committee members
The National Fenestration Rating Council (NFRC) is seeking members for a committee to pursue recognition of its ratings procedures from the American National Standard Institute (ANSI).
| Nov 23, 2011
Obama signs repeal of 3% withholding on government contracts
President Obama signed a bill that repeals a law requiring governments to withhold 3% of payments over $10,000 to contractors.
| Nov 23, 2011
USGBC launches app lab for LEED certification process
The U.S. Green Building Council has released the App Lab, a searchable catalog of third-party apps that are integrated with LEED data.
| Nov 23, 2011
Document gives advice on stormwater runoff management
The report, “Rooftops to Rivers II,” provides tips on how cities can use smart infrastructure and green building design to minimize pollution from stormwater runoff and other wastewaters.
| Nov 23, 2011
Zoning changes proposed to make New York City buildings greener
New York City will introduce new zoning proposals next month that would make it easier for building owners to add features that will make their properties more sustainable.
| Nov 18, 2011
AGC offers webinar on Davis-Bacon compliance
Webinar to be held in two sessions, Dec. 7 and 8 from 2:00-3:30 p.m. EST.
