Featured Research

from universities, journals, and other organizations

Building better asphalt with nanoclays

Date:
May 4, 2012
Source:
Michigan Technological University
Summary:
Using nanotechnology, researchers are paving the way for brand-new asphalt blends to fight off cracks, rutting and potholes.

Long before the age of freeways and parking lots, Babylonians used a naturally occurring asphalt to reinforce their roads. You can still see patches of the old pavement in the ancient city, even though it was installed in about 600 B.C.

Under the onslaught of 21st century traffic, modern asphalt isn't likely to hold up for anywhere near 2,700 years. But at Michigan Technological University, Zhanping You is paving the way for brand-new asphalt blends to fight off cracks, rutting and potholes.

"Asphalt is now made from petroleum, so it's very expensive," said You, an associate professor of civil and environmental engineering. "As a result, a lot of people are looking at ways to make it more durable."

Heat, cold and stress in the form of traffic take their toll on asphalt pavement, made from a mix of asphalt and aggregates like gravel. That leads to cracks, potholes and a process called rutting. Ruts are most likely to form on busy roads, sections with slow traffic, and areas with stop signs and stoplights, where the rubber hits the road hard thousands of times a day.

"Rutting can be very dangerous, especially in snow and ice," You said. "If we could use advanced materials to reduce rutting, that would be very beneficial to the public."

You's team tested two types of nanoclays, adding 2-4 percent by weight to the asphalt. That's a smidgeon--less than half of a percent of the total weight of the asphalt pavement itself. But it made a big difference.

"It improved the viscosity significantly," You said. "That means it will provide better stiffness, which means that it won't deform as much in hot weather or under heavy traffic."

They don't yet know if nanoclay can help asphalt resist cracking in cold weather or under heavy loads, since their testing isn't completed. "But it is always our goal to develop new asphalt mixtures with those qualities," You said.

His lab is also testing how other nanomaterials, including nano-silica and nano-composites, will affect asphalt durability.


Story Source:

The above story is based on materials provided by Michigan Technological University. The original article was written by Marcia Goodrich. Note: Materials may be edited for content and length.


Journal Reference:

  1. Zhanping You, Julian Mills-Beale, Justin M. Foley, Samit Roy, Gregory M. Odegard, Qingli Dai, Shu Wei Goh. Nanoclay-modified asphalt materials: Preparation and characterization. Construction and Building Materials, 2011; 25 (2): 1072 DOI: 10.1016/j.conbuildmat.2010.06.070

Cite This Page:

Michigan Technological University. "Building better asphalt with nanoclays." ScienceDaily. ScienceDaily, 4 May 2012. <www.sciencedaily.com/releases/2012/05/120504135726.htm>.
Michigan Technological University. (2012, May 4). Building better asphalt with nanoclays. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2012/05/120504135726.htm
Michigan Technological University. "Building better asphalt with nanoclays." ScienceDaily. www.sciencedaily.com/releases/2012/05/120504135726.htm (accessed July 29, 2014).

Share This




More Matter & Energy News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Lithium Battery 'Holy Grail' Could Provide 4 Times The Power

Lithium Battery 'Holy Grail' Could Provide 4 Times The Power

Newsy (July 28, 2014) Stanford University published its findings for a "pure" lithium ion battery that could have our everyday devices and electric cars running longer. Video provided by Newsy
Powered by NewsLook.com
The Carbon Trap: US Exports Global Warming

The Carbon Trap: US Exports Global Warming

AP (July 28, 2014) AP Investigation: As the Obama administration weans the country off dirty fuels, energy companies are ramping-up overseas coal exports at a heavy price. (July 28) Video provided by AP
Powered by NewsLook.com
Shipping Crates Get New 'lease' On Life

Shipping Crates Get New 'lease' On Life

Reuters - Business Video Online (July 25, 2014) Shipping containers have been piling up as America imports more than it exports. Some university students in Washington D.C. are set to get a first-hand lesson in recycling. Their housing is being built using refashioned shipping containers. Lily Jamali reports. Video provided by Reuters
Powered by NewsLook.com
Europe's Highest Train Turns 80 in French Pyrenees

Europe's Highest Train Turns 80 in French Pyrenees

AFP (July 25, 2014) Europe's highest train, the little train of Artouste in the French Pyrenees, celebrates its 80th birthday. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins