Durability + Design
 
About  |  Subscribe  |  Advertise  |  Connect 
Follow us on Twitter Like us on Facebook

 

Download our FREE e-book! Advances in Architectural Coatings Technology

D+D News

Main News Page


First Coating to Heal Concrete Emerges

Thursday, February 28, 2013

More items for Coatings Technology

Comment | More

A team of Korean scientists say they have developed the world’s first self-healing protective coating for cracks in concrete.

Sunlight-Induced Self-Healing of a Microcapsule-Type Protective Coating,” published Feb. 1 in ACS Applied Materials & Interfaces, describes the groundbreaking work by Chan-Moon Chung and colleagues at Yonsei University and Korea Conformity Laboratory in Korea.

Keeping Tiny Cracks Tiny

Researchers say the material is inexpensive, environmentally friendly, and holds the ability to self-repair damage to the world’s most widely used building material.

cracking exterior concrete walls
Tim1965 / Wikimedia Commons

The new coating aims to repair superficial cracks before they become more serious.

The idea is to prevent the spread of tiny cracks in concrete roads, bridges and other structures—an elusive goal that the scientists say “has been a major technological challenge.”

“Cracks allow water, salt used for deicing, and air to enter the concrete,” the American Chemical Society reports in a release about the project. “During winter weather, water in the cracks freezes, expands and the cracks get bigger, with road salt speeding concrete’s deterioration.”

A First for Concrete

A number of self-healing anticorrosive coatings for metal substrates are in development; NEI Corp. and a group of Dutch researchers have both unveiled such research over the last year.

However, “there have been no reports on self-healing protective coating for concrete,” says the Korean team.

The research was supported by Korean government science agencies and the National Research Foundation of Korea.

How it Works

The spray-applied, hydrophobic coating contains microcapsules loaded with a urea-formaldehyde polymer material that seals cracks. The act of cracking actually ruptures the microcapsules, releasing the healing agent, the journal says.

Self-Healing Concrete graphic
ACS

The coating is spray-applied to concrete surfaces. When a crack occurs in the substrate, the event ruptures the coatings's microcapsules, which release a healing agent that is solidified by sunlight.

Sunlight shining on the concrete activates and solidifies the sealant. Optical microscopy and scanning electron microscopy (SEM) confirmed the release and the filling response of the healing agent when applied to the surface of cellulose fiber-reinforced cement board or mortar.

“Our self-healing coating is the first example of capsule-type photo-induced self-healing system, and offers the advantages of catalyst-free, environment-friendly, inexpensive, practical healing,” the researchers’ report says.

   

Tagged categories: Concrete coatings and treatments; Concrete masonry units (CMU); Concrete repair; Research

Comment Join the Conversation:

Sign in to our community to add your comments.

Dumond Chemicals Inc.
LEAD STOP®
Lead Encapsulating Compound

is a thick elastomeric coating that is made to be a long lasting barrier over lead-based paint. LEAD STOP® provides a protective barrier coat that seals and locks in lead that is contained in old lead-based paints on previously painted surfaces.


Armorthane
Best Floor Coatings with Maximum Durability

Coat CONCRETE or WOOD flooring for wheel and foot traffic, chemical resistance, weather-proofing, indoors and outside. Variety of textures for beauty, resilience and safety.


AGC Chemicals
FEVE Resins Used On Joe DiMaggio Children’s Hospital Curtain Walls

Not only do LUMIFLON FEVE resin-based coatings provide added durability on metal-clad buildings, they are a leading product in the area of environmental sustainability.


KTA-Tator, Inc. - Corporate Office
KTA Inspection Services

Determine Specification Compliance:
• Surface Preparation
• Moisture Content
• Paint Materials & Application
• Aesthetics
Contact:
Kevin Brown, 336-874-2651
Corporate:
1-800-245-6379 x208


Keim Mineral Coatings
Concrete Coatings penetrate, chemically bond and will never peel, blister or fade

Complete mineral silicate concrete repair and finish systems to solve concrete problems for decades long beauty and protection.


Lignomat USA Ltd.
A dependable Source for Moisture Meters

Lignomat manufactures pin, pinless and in-situ probe meters for concrete and other building materials. Call 800-227-2105 to find the best moisture measuring device for your application.


Atlas Material Testing Technology

Helping You Put Your Products To The Test

• Outdoor Accelerated
Weathering
• Laboratory Testing
Services
• Accelerated Weathering
Instruments

www.atlas-mts.com atlas.info@ametek.com

 
 
 

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

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


The Technology Publishing Network

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

 

© Copyright 2012-2015, Technology Publishing Co., All rights reserved