PaintSquare.com


The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

Free Download of

Paint and Coatings Industry News

Main News Page


‘Green’ Concrete Uses Recycled Glass

Monday, January 11, 2010

Comment | More

Student Center at Clarkson University

A Clarkson University professor has teamed up with a manufacturer to produce “green” concrete that replaces Portland cement with recycled industrial glass powder.

The university, in Potsdam, N.Y.,  will use 7,500 blocks of the cement in its new 56,000-square-foot student center, set to open in August.

The university calls the green blocks “more economical, energy-efficient, and environmentally friendly than traditional ones.” It also says they are stronger than traditional concrete.

Development of the "green" blocks began with a challenge faced by Potters Industries, a major international manufacturer of engineered beads made entirely from recycled glass. Its local plant was generating 8,000 tons of excess fine powder a year while making tiny pieces for high-tech applications that range from reflective highway lane paint to hypodermic needles. Potters sought an efficient use for this byproduct, which looks and feels like grayish-white baby powder.

Enter Civil Engineering and Environmental Engineering Professor Narayanan Neithalath, an expert on cement-based materials and sustainable concretes and an affiliate of Clarkson's Center for Advanced Materials Processing (CAMP).

Funded by the New York State Department of Economic Development Environmental Investment Program and the New York State Foundation for Science, Technology and Innovation through CAMP, Neithalath began his research in June 2006 and concluded it in December 2008 after extensive field tests at Woodruff Block, a manufacturer in Potsdam.

The company then produced the blocks for the student center.

Concrete is the world's most widely used man-made material. Some 12 billion metric tons are churned out each year (a cubic meter for every person on the planet) as infrastructure for roads, bridges and buildings.

About 75 percent of this, the university says, is Portland cement, “a limestone-based binder whose production significantly depletes natural resources and also stresses the environment. The costly, energy-intensive manufacture of cement, for example, is a major source of carbon dioxide emissions.

“Thus, replacing it with powdered glass promotes sustainability by limiting pollution, reducing energy consumption, and preserving resources and saves money by utilizing a far less costly leftover industrial byproduct (in this case, one that has already been previously recycled).”

In addition, the recycled glass powder actually improves concrete's mechanical performance, Neithalath says.

“While researchers have previously blended other kinds of crushed or powdered glass with cement, no one had analyzed or tested the possibilities of adding the byproduct from industrial bead manufacturing,” the university said in a statement.

“Glass powder is effective in concrete primarily because it is loaded with silica, which can react with other cement components (calcium hydroxide, for example) to increase the material's strength through hydration (which leads to hardening). Such so-called secondary binding compounds also reduce porosity and add to long-term durability.”

Says Neithalath:  "Therefore you can take away some of the expensive and energy-intensive Portland cement without losing any of its important properties—and, in fact, you make the concrete better."

"Proportioning is critical," he adds. "Amounts of glass that are too high can make concrete weaker because it does not have enough calcium compounds to generate strength. Also, glass has lots of alkalis. In excess these might lead to chemical reactions that can compromise long-term performance."

   

Tagged categories: Concrete; Green design

Comment Join the Conversation:

Sign in to our community to add your comments.

LS Industries
LS Blasters: Optimum Steel Cleaning Efficiency

Simplify surface prep with the precise shot control of LS Blasters. Our blast technology delivers optimum coverage and finish. 800-533-8008


Simpson Strong-Tie
Repair, Protect & Strengthen

Need a coating? Turn to Fox. We have solutions to repair, protect and strengthen concrete, steel and wood substrates. Call 888-760-0369 or email info@foxind.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


Polyval Coatings
Polyflex® Polyurea Linings

exhibit outstanding versatility in use; providing abrasion resistance, superior seamless waterproofing and high-chem corrosion protection. www.polyflexlinings.com


NLB Corporation
VacLance cleans up as you work

Add vacuum recovery to any NLB rotating water jet lance with a VacLance attachment and vacuum source. Model DM32283 works vertically, horizontally and in corners.


Clemco Industries Corp.
Powerful Protection in a Small Package

Mounts inside blast helmet, alerts operator to dangerous breathing-air condition by audible, visual, and vibratory alarms. Easily calibrated, battery operated.


JPCL Europe
Don’t miss an issue!

JPCL EUROPE offers essential news and knowledge for protective and marine coatings professionals in Europe, the Middle East and Africa. Subscribe now: www.jpcleurope.com

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker JPCL Europe

 
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
 

© Copyright 2000-2014, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com