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Evaluation of Fire-Performance by Cone-Calorimeter Tests and Thermal Conductivity of Polymer-Modified Mortars and Various Concretes



Author(s)

Sanjay PAREEK

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DOI:10.17265/2161-6221/2017.3-4.005

College of Engineering, Nihon University, Koriyama, Fukushima-ken 963-8642, Japan

In this study, experimental study is carried out in order to understand the behavior of various concretes and mortars under elevated temperatures with emphasis on thermal conductivity of each type of material during fire. The reaction to fire test by cone-calorimeter method and thermal conductivity of normal concrete, high-density concrete, light-weight aerated mortar, ordinary cement mortar and polymer-modified mortars have been taken into consideration. The heat release rate and total heat release of normal concrete, high-density concrete, light-weight aerated mortar and ordinary cement mortar specimens was remarkably lower than 200kW/m² and 8MJ/m², respectively and showed no explosive spalling or cracking on the surface of specimens. Polymer-modified mortar specimens showed an increase in heat release rate and total heat release with the increase of polymer-cement (P/C) ratio. Furthermore, SBR-20% and PAE-20% specimens showed an explosive spalling behavior. Thermal conductivity of high-density concrete and polymer-modified mortars was higher than normal concrete and mortar.

Heat-release rate (kW/m²), total heat release (MJ/m²), thermal conductivity, polymer-modified mortar, concrete.