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http://dx.doi.org/10.4334/JKCI.2006.18.4.559

Evaluation of Wet-Mixed High Strength Sprayed Polymer Mortar for Fire Resistance  

Won, Jong-Pil (Dept. of Civil & Environmental System Engineering, Konkuk University)
Choi, Seok-Won (Dept. of Civil & Environmental System Engineering, Konkuk University)
Park, Chan-Gi (Dept. of Civil & Environmental System Engineering, Konkuk University)
Park, Hae-Kyun (Samsung Corporation Engineering & Construction Group, Civil Engineering Technology Team)
Publication Information
Journal of the Korea Concrete Institute / v.18, no.4, 2006 , pp. 559-568 More about this Journal
Abstract
The purpose of this study is to evaluate the mechanical performance and fire resistance of wet-mixed high strength sprayed polymer-modified mortar in order to protect tunnel lining system which are in the event of fire disaster. Since the current commercial fire-resistant materials reproduce the low strength issue of mortar, this study aims to provide an enhanced fire-resistant mortar with a proper strength. Normally, a large temperature gradient phenomenon arise in the vicinity of free surfaces which are fully exposed in the event of persistent flame. Thereby, the determination of optimal cover depth of wet-mixed high strength sprayed polymer-mortar(WHSPM) is important for fire-resistance of tunnel lining system. With comparison of current commercial fire-resistance materials and WHSPM, the experimental result of WHSPM shows the better fire-resistant performance than the others. In addition, the cover limitation should be controlled by minimum 4cm depth in order to avoid fire-induced damage.
Keywords
cover thickness; fire resistance of tunnel; high strength; polymer; sprayed mortar;
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