Disassembly Properties of Cementitious Finish Joints Using an Induction Heating Method

Materials

Jaecheol Ahn²  Takafumi Noguchi¹  Ryoma Kitagaki¹ 

[1] Department of Architecture, the University of Tokyo, Hongo 7-3-1, Tokyo 113-8654, Japan; E-Mails:;Department of Architecture, Dong-A University, 550 Beon-gil Saha-gu, Busan 604-714, Korea

关键词: induction heating;    cementitious joint;    mortar;    steel fiber;    conductive resistor;    disassembly property;   

DOI  :  10.3390/ma8052433

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.