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http://dx.doi.org/10.7734/COSEIK.2018.31.5.251

Prediction of the Minimum Required Pressure of Soundless Chemical Demolition Agents for Plain Concrete Demolition  

Kim, Kyeongjin (Department of Civil and Environmental Engineering, Korea Maritime and Ocean University)
Cho, Hwangki (Department of Mechanical Engineering, Korea Maritime and Ocean University)
Sohn, Dongwoo (Department of Mechanical Engineering, Korea Maritime and Ocean University)
Koo, Jaehyun (Hanyang EMC)
Lee, Jaeha (Department of Civil Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.31, no.5, 2018 , pp. 251-258 More about this Journal
Abstract
In construction site, conventional methods such as jackhammer or explosive methods(dynamite) have been often used for the demolition of structures. Use of those methods are more carefully treated in environmentally and historically sensitive area. For those reasons, use of Soundless Chemical Demolition Agent(SCDA) is getting the spotlight. The SCDA is a powder which has expansive strength when it is mixed with water. In these Characteristics, SCDA can destroy the concrete or rock as it is poured into boreholes of the concrete or rock structures. However, there is no industrial standard for the use of SCDA effectively yet. In this study, experimental study to measure the expansive pressure was conducted depending on various boundary conditions such as waterproof, length of the steel pipe, submerged of steel pipe. Furthermore, computational analysis using damage plasticity model to predict the minimum required pressure of the SCDA for the concrete demolition depending on spacing between holes(k-factor) and compressive strength of the concrete was conducted. Obtained results indicates that water heat dissipation with submerged steel pipe shows the stable pressure for measuring the SCDA and hole distance(k-factor) is the most important factor for crack initiation of concrete.
Keywords
concrete demolition; crack propagation; SCDA; minimum required pressure;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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