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http://dx.doi.org/10.4334/JKCI.2006.18.3.431

A Experimental Study on the Evaluation of Deteriorated Concrete Member Exposed One Side at High Temperature  

Lee, Joong-Won (Dept. of Architecture, Ansan College of Technology)
Choi, Kwang-Ho (Dept. of Architecture, Namseoul University)
Hong, Kap-Pyo (Dept. of Architectural Engineering, Yonsei University)
Publication Information
Journal of the Korea Concrete Institute / v.18, no.3, 2006 , pp. 431-438 More about this Journal
Abstract
The determination of the depth of deteriorated concrete is one of the main problems in the structural assessment of concrete structures that have been subjected to a fire. This information is particularly important in order to optimize the future operations of repair/strengthening, or in decision-making concerning a possible demolition. The purpose of this study is to propose evaluation technique of damaged depth of concrete exposed at high temperature. In order to evaluate damaged depth of core picked at member under fire, the 24 specimens have been made with variables of concrete strength(20 MPa, 40 MPa, 60 MPa) and heating exposure condition in 600 and 800 for 2 hours. Color change analysis and water absorption after heating have been measured and split tensile stress test was performed to ka the residual compressive strength against the depth of specimen. The results show that the deeper of the depth from heating face, water absorption ratio is smaller and residual stress ratio is larger and the color of heated face is changed to red color. Using this technique at damage evaluation of fired structure, We evaluate damaged depth of member under fire and determine the reasonable strengthening range.
Keywords
fire; high temperature; reinforced concrete; damage evaluation; color analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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