PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

Coatings Industry News

Main News Page


Seeding a Stronger Concrete

Tuesday, July 9, 2013

Comment | More

So what do you with 661,386,840 pounds of leftover sunflower seed husks each year?

If you're Turkey, which generates that fibrous avalanche, you find new uses for them. And if you can find them a place in the world's most common building material, you've got a match made in sustainable construction heaven.

Turkish researchers are reporting such a match, using sunflower seed husk material as concrete filler. Not only does the technology use up some of that voluminous food waste, the researchers say, but the aggregate creates a concrete that is more resistant to cracking during freeze-thaw cycles.

Sunflower crops
syngenta.com

Sunflowers are an important crop in Turkey, used primarily to produce sunflower oil.

"Sunflower seed waste as lightweight aggregate in concrete production," an article forthcoming in the International Journal of Environment and Waste Management, explains the team's findings.

Better Crack Resistance

"The team demonstrated that the use of husks reduces the density of concrete, as well as boosting the material's resistance to cracking after exposure to icy then thawing conditions," the journal reports.

"Its physical and mechanical properties show that concrete produced with [sunflower seed husks] has great potential as a low-cost, lightweight building material."

The new technology comes from engineers Can Burak Sisman and Erhan Gezer of Namik Kemal University in Turkey.

They explain how the accumulation of unmanaged wastes from the food industry, especially in developing countries, is becoming increasingly problematic.

Concrete blocks
inhabitat.com

Concrete is the world's most common building material, and manufacturing is an energy-intensive process. Efforts have been underway to reduce its carbon footprint.

Part of the answer, the researchers say, is finding new applications for the waste in environmentally friendly materials and composites for the road-building and construction industries. Doing so could also help ease the rising cost and chronic shortages of conventional materials.

Engineers are thus being challenged to convert industrial wastes to replacements for certain materials.

Concrete Alternatives

The world's most common building material, concrete is also considered one of  its most energy- and resource-intensive materials. Efforts have been underway for years to find ways to recycle and reuse the material.

In addition, waste rubber, glass powder, paper waste sludge and other products have all been tested as alternative concrete fillers and bulking agents. Any such addition or substitution can, of course, significantly affect the concrete's strength, density, water resistance and other physical properties.

In April, researchers in Kansas announced some success with integrating post-harvest leftovers from rice, corn and wheat crops into concrete.

  Sunflower
natural-homeremedies.com

Researchers tried various recipes of sunflower seed cement. The mixtures reduced unit but increased water absorption.

The Kansas team says the cellulosic ethanol byproducts could help replace some of the Portland cement used in making nearly seven billion cubic meters of concrete each year. Not coincidentally, Kansas is the largest wheat-producing state and generates millions of tons of byproducts.

Sunflower Power

Similarly, Turkey is the ninth largest sunflower producer in the world, generating almost a million metric tons (tonnes) of product from 584,000 hectares, most of which goes to manufacture sunflower oil.

That output generates about 300,000 tonnes of fibrous seed husk annually, the team says.

The team experimented with different formulations of seed husk in a concrete mix, in amounts ranging from 5 percent to 30 percent of the mix.

Sunflower crop
miracle2.net

Turkey's sunflower output generates about 300,000 tonnes of fibrous seed husk annually, the team says.

They produced concrete samples with a density of about 2,000 tonnes per cubic metre; the lowest density could be classified as "lightweight."

The bottom line: "Some samples had low compressibility suitable for construction use, although higher husk content meant the resulting concrete could be used only for insulation applications," the journal reported.

"The replacement of SSH dramatically reduced the unit weight, compressive strength, splitting tensile strength and freezing-thawing resistance, but it increased the water absorption rate after 28 and 90 days," the team said.

For now, the team suggests, sunflower seed concrete would be most suitable for the construction of agricultural buildings that are usually only one floor and do not to be as sufficiently load bearing as domestic or office buildings.

   

Tagged categories: Bio-based materials; Cement; Concrete; Construction; Green building

Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
International Bridge Conference
 
2017 International Bridge Conference
 
June 4-8, 2017, National Harbor, Maryland
 

 
SEMicro Division, M.E. Taylor Engineering, Inc.
 
Coatings Adhesion Testers
 
The PATTI® accurately measures the bond strength between coating & substrate. Outfitted properly, the surface can be rough, porous, or curved & >10K psi strong!
 

 
Detail Masters
 
Overspray Removal
 
We offer professional, turnkey service and unparalleled quality!
Our process can save hundreds— even thousands of dollars. It's fast, environmentally safe and 100% guaranteed.
 

 
Industrial Vacuum Equipment Corp.
 
Hurricane Vacuums
& Dust Collectors
 
Vacuum and dust collector hose, filters and related accessories.
IndustrialVacuum.com
 

 
Corrosion Probe, Inc.
 
From Detection to Correction
 
Corrosion Probe, Inc. has the Most Concrete Coatings Experience and Expertise. Contact us today at
860-767-4402, www.cpiengineering.com
 

 
BASF
 
New resins from BASF will have metals loving water!
 
Excellent corrosion resistance, low VOC, high gloss, thin films www.basf.us/industrialcoatings dpsolutions@basf.com 800-231-7868
 

 
HoldTight Solutions Inc.
 
NO FLASH RUST - NO CONTAMINANTS
 
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802 sales@holdtight.com
 

 
PPG Protective and Marine Coatings Group
 
We Protect and Beautify the World
 
PPG is widely recognized as a world leader in protective and marine coatings, developing innovative, cutting-edge products and services.
 

 
Termarust Technologies
 
Termarust (HR CSA) Chemically Stops
Active Corrosion
 
Arch truss treated with Termarust's (HR CSA) in 2003. This steel arch bridge is rust free on all surfaces including the crevice corroded joints and connections.
 

 
 
 

Technology Publishing Co., 2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us