Comparative Study of Concrete Panels' Fire Resistance


There is still a concern regarding concrete structures' fire safety, mostly due to the occurrence of concrete spalling. Although many tests have already been carried out, there is no clear definition about the parameters of the factors that influence its occurrence. This paper aimed to compare three different types of concrete panels, with dimensions of 300 x 315 x 10 cm (124.0 x 39.4 x 3.9 in.), composed of reinforced concrete (RC), prestressed concrete, and polypropylene microfiber RC. The panels were exposed to the standard fire curve based on ISO 834, aged 28 days, measuring the temperatures in panels' surfaces. Prestressed concrete panels experienced explosive spalling 18 minutes after the test began. RC panels and the panels with polypropylene microfiber addition maintained their integrity and structural stability for 240 minutes, failing in the thermal insulation criteria at 210 and 140 minutes, respectively. Although polypropylene microfiber concrete panels presented no spalling of concrete, conventional concrete panels attended the standardized criteria for a longer period due to its better thermal insulation.


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Concrete beams and girders; Concrete buildings; Concrete slabs; Fire resistance; Polypropylenes; Precast concrete; Prestressed concrete; Reinforced concrete; Reinforced plastics; Safety engineering; Spalling; Stability; Stability criteria; Thermal insulation; Concrete panels; Concrete spalling; Fire safety; Microfibers; Precast concrete panels; Concretes; Polypropylene Microfibers

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


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© 2017 American Concrete Institute (ACI), All rights reserved.

Publication Date

01 Sep 2017