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Open AccessArticle

Disassembly Properties of Cementitious Finish Joints Using an Induction Heating Method

1
Department of Architecture, Dong-A University, 550 Beon-gil Saha-gu, Busan 604-714, Korea
2
Department of Architecture, the University of Tokyo, Hongo 7-3-1, Tokyo 113-8654, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Klara Hernadi
Materials 2015, 8(5), 2433-2453; https://doi.org/10.3390/ma8052433
Received: 18 January 2015 / Revised: 28 April 2015 / Accepted: 30 April 2015 / Published: 8 May 2015
(This article belongs to the Section Manufacturing Processes and Systems)
Efficient maintenance and upgrading of a building during its lifecycle are difficult because a cementitious finish uses materials and parts with low disassembly properties. Additionally, the reuse and recycling processes during building demolition also present numerous problems from the perspective of environmental technology. In this study, an induction heating (IH) method was used to disassemble cementitious finish joints, which are widely used to join building members and materials. The IH rapidly and selectively heated and weakened these joints. The temperature elevation characteristics of the cementitious joint materials were measured as a function of several resistor types, including wire meshes and punching metals, which are usually used for cementitious finishing. The disassembly properties were evaluated through various tests using conductive resistors in cementitious joints such as mortar. When steel fiber, punching metal, and wire mesh were used as conductive resistors, the cementitious modifiers could be weakened within 30 s. Cementitious joints with conductive resistors also showed complete disassembly with little residual bond strength. View Full-Text
Keywords: induction heating; cementitious joint; mortar; steel fiber; conductive resistor; disassembly property induction heating; cementitious joint; mortar; steel fiber; conductive resistor; disassembly property
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MDPI and ACS Style

Ahn, J.; Noguchi, T.; Kitagaki, R. Disassembly Properties of Cementitious Finish Joints Using an Induction Heating Method. Materials 2015, 8, 2433-2453.

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