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Materials 2014, 7(12), 7843-7860; doi:10.3390/ma7127843

The Fire Resistance Performance of Recycled Aggregate Concrete Columns with Different Concrete Compressive Strengths

1
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
2
Tianjin Cement Industry Design & Research Institute Co., Ltd., Tianjin 300400, China
*
Author to whom correspondence should be addressed.
Received: 10 July 2014 / Revised: 22 November 2014 / Accepted: 27 November 2014 / Published: 8 December 2014
(This article belongs to the Special Issue Recycled Materials)
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Abstract

In order to ascertain the fire resistance performance of recycled aggregate concrete (RAC) components with different concrete compressive strengths, four full-scaled concrete columns were designed and tested under high temperature. Two of the four specimens were constructed by normal concrete with compressive strength ratings of C20 and C30, respectively, while the others were made from recycled coarse aggregate (RCA) concrete of C30 and C40, respectively. Identical constant axial forces were applied to specimens while being subjected to simulated building fire conditions in a laboratory furnace. Several parameters from the experimental results were comparatively analyzed, including the temperature change, vertical displacement, lateral deflection, fire endurance, and failure characteristics of specimens. The temperature field of specimens was simulated with ABAQUS Software (ABAQUS Inc., Provindence, RI, USA) and the results agreed quite well with those from the experiments. Results show that the rate of heat transfer from the surface to the interior of the column increases with the increase of the concrete’s compressive strength for both RAC columns and normal concrete columns. Under the same initial axial force ratio, for columns with the same cross section, those with lower concrete compressive strengths demonstrate better fire resistance performance. The fire resistance performance of RAC columns is better than that of normal concrete columns, with the same concrete compressive strength. View Full-Text
Keywords: recycled aggregate concrete (RAC) column; fire resistance; high-temperature test; temperature field; finite element method (FEM) analysis; concrete compressive strength recycled aggregate concrete (RAC) column; fire resistance; high-temperature test; temperature field; finite element method (FEM) analysis; concrete compressive strength
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dong, H.; Cao, W.; Bian, J.; Zhang, J. The Fire Resistance Performance of Recycled Aggregate Concrete Columns with Different Concrete Compressive Strengths. Materials 2014, 7, 7843-7860.

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