DBPapers
DOI: 10.5593/SGEM2014/B61/S24.027

THE USE OF MICRO-SYNTETIC FIBERS FOR PREVENTING HIGH STRENGTH CONCRETE SPALLING

O. E. Cazan, M. C. Gherman
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-20-9 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 1, 191-196 pp

ABSTRACT
This paper presents the behavior of high strength concrete with micro polypropylene
fibers under high temperature conditions. Two types of polypropylene fibers
percentages were added in the concrete mix. Cubes of 100x100x100 mm were designed with C70 concrete. The concrete specimens were naturally cooled to room temperature after being heated in an electric furnace. No explosive spalling was observed during the heating process. The residual compressive and splitting tensile strength were determined after heating the specimens to 500 ºC, 700 ºC, respectively 900 ºC. After exposing the concrete specimens to 900 °C, the residual compressive and splitting tensile strength reached values near 30% of their strength determined at room temperature.

Keywords: high temperatures, polypropylene fibers, residual strength, spalling