Featured Research

from universities, journals, and other organizations

Solution For Recycled Car Tires?

Date:
August 26, 1999
Source:
CSIRO Australia
Summary:
A technological breakthrough by Australian scientists has produced a solution for the world's mountains of waste truck and car tyres.

A technological breakthrough by Australian scientists has produced a solution for the world's mountains of waste truck and car tires.

Every year more than 700 million new car and truck tires are manufactured and there's not much use for them when they are replaced - most are buried or burned.

"We have a fantastic technology that can turn old rubber tires into a range of useful plastic and rubber composites that are suitable for many engineering applications throughout the rubber and plastics industry," says the Chief of CSIRO Building Construction & Engineering, Mr Larry Little.

In Australia about 70% of the estimated 11 million tires discarded annually are still being dumped, used as landfill, or stockpiled.

Tires can now be recycled and used in shoe soles, automotive components, building products, coatings/sealants and containers for hazardous waste.

"Our new revolutionary patented surface treatment technology means we can offer the world a solution to its tire mountain," says Mr Little.

The technology has already been proven through the development of rubber ABS (Acrylonitrile-Butadiene-Styrene) composites for EcoRecycle Victoria. The composite uses 50% crumbed rubber to replace plastic, offering an economic alternative to Poly Vinyl Chloride (PVC) plastics.

"These applications represent a huge global market for the new composite products that could potentially consume all the rubber available from tire disposal in a way that is energy-efficient and environmentally clean," Mr Little says.

Despite environmental concerns, incineration of scrap tire rubber as a fuel source is currently the most widely used method of disposal. One example is burning tires to fire cement kilns.

Although burning a kilo of tire rubber generates approximately 28,600 BTUs (British Thermal Units) of energy, it actually requires much higher energy (approximately 121,000 BTUs) to produce a kilo of raw rubber.

Since most common tire recycling methods require less than 2,200 BTUs to process about a kilo of scrap tires into clean crumb rubber, the use of crumb rubber in new products could offer considerable energy savings.

Perfecting the revolutionary technology took six years work by a team of eight scientists, now led by CSIRO's Dr Dong Yang Wu.

"We recognised that rubber has many excellent mechanical properties in comparison to other materials. These include impact resistance, flexibility, abrasion resistance, and resistance to degradation, properties that point to crumbed rubber (produced from discarded tires) having the potential to be a great engineering material," says Dr Wu.

"A major obstacle in the past has been the limited amount of crumbed rubber that can be mixed with virgin compounds, especially in car tires for example," she says.

"Usually simple mixing produces a product with poor mechanical performance only fit for unsophisticated products like railroad crossing pads, impact-absorbing mats, and garbage bins.

"The scientific challenge was to discover how to chemically modify the surface of crumb rubber molecules to transform it into a reactive ingredient to effectively grab hold of and combine with rubber or polymers (plastics).

"We developed a simple way to build a molecular bridge using a suitable coupling molecule to make crumbed rubber successfully combine with other materials, which leads to significantly enhanced mechanical performance of the composites.

"In this way, Dr Wu says, "the surface treated rubber crumb may be used in a broad range of high value applications"

The actual process and surface treatments used are protected by an international patent with other patents pending," Dr Wu said.

Examples of applications include: Shoe soles, automotive components, tires, non-pneumatic tires, wheels, building products (roofing materials, insulating materials, window gaskets) coatings/sealants, containers for hazardous waste, industrial products (enclosures, conveyor belts, etc) and many more.

For Further Information contact:

Ken Anderson, Manager Communications CSIRO Building, Construction and Engineering.

Email: Ken.Anderson@dbce.csiro.au


Story Source:

The above story is based on materials provided by CSIRO Australia. Note: Materials may be edited for content and length.


Cite This Page:

CSIRO Australia. "Solution For Recycled Car Tires?." ScienceDaily. ScienceDaily, 26 August 1999. <www.sciencedaily.com/releases/1999/08/990825183400.htm>.
CSIRO Australia. (1999, August 26). Solution For Recycled Car Tires?. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/1999/08/990825183400.htm
CSIRO Australia. "Solution For Recycled Car Tires?." ScienceDaily. www.sciencedaily.com/releases/1999/08/990825183400.htm (accessed July 25, 2014).

Share This




More Matter & Energy News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

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
TSA Administrator on Politics and Flight Bans

TSA Administrator on Politics and Flight Bans

AP (July 24, 2014) TSA administrator, John Pistole's took part in the Aspen Security Forum 2014, where he answered questions on lifting of the ban on flights into Israel's Tel Aviv airport and whether politics played a role in lifting the ban. (July 24) Video provided by AP
Powered by NewsLook.com
Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
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