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Self-healing protective coating for concrete

Date:
February 20, 2013
Source:
American Chemical Society
Summary:
Scientists are reporting development of what they describe as the first self-healing protective coating for cracks in concrete, the world's most widely used building material. The material is both inexpensive and environmentally friendly.

Scientists are reporting development of what they describe as the first self-healing protective coating for cracks in concrete, the world's most widely used building material. Their study on the material -- which is inexpensive and environmentally friendly -- appears in the journal ACS Applied Materials & Interfaces.

Chan-Moon Chung and colleagues explain that protecting concrete roads, bridges and other structures from developing tiny cracks has been a major technological challenge. Cracks allow water, salt used for deicing and air to enter the concrete. During winter weather, water in the cracks freezes, expands and the cracks get bigger, with road salt speeding concrete's deterioration. "Although several reports of self-healing anticorrosive coatings for metal protection have appeared, there have been no reports on self-healing protective coating for concrete," say the scientists.

They describe development of such a coating, one that contains microcapsules loaded with a material that seals cracks. Cracking ruptures the microcapsules, releasing the healing agent. Sunlight shining onto the concrete activates and solidifies the sealant. "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 report states.

The authors acknowledge research supported by Korea Institute of Construction & Transportation Technology Evaluation and Planning Grant funded by Ministry of Land, Transport and Maritime Affairs and by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology.


Story Source:

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


Journal Reference:

  1. Young-Kyu Song, Ye-Hyun Jo, Ye-Ji Lim, Sung-Youl Cho, Hwan-Chul Yu, Byung-Cheol Ryu, Sang-In Lee, Chan-Moon Chung. Sunlight-Induced Self-Healing of a Microcapsule-Type Protective Coating. ACS Applied Materials & Interfaces, 2013; 130213090116007 DOI: 10.1021/am302728m

Cite This Page:

American Chemical Society. "Self-healing protective coating for concrete." ScienceDaily. ScienceDaily, 20 February 2013. <www.sciencedaily.com/releases/2013/02/130220114028.htm>.
American Chemical Society. (2013, February 20). Self-healing protective coating for concrete. ScienceDaily. Retrieved April 16, 2014 from www.sciencedaily.com/releases/2013/02/130220114028.htm
American Chemical Society. "Self-healing protective coating for concrete." ScienceDaily. www.sciencedaily.com/releases/2013/02/130220114028.htm (accessed April 16, 2014).

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