Strength characteristics of concrete exposed to the elevated temperatures according to the temperature-time curve ISO 834

Strength characteristics of concrete exposed to the elevated temperatures according to the temperature-time curve ISO 834

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While exposed to high temperatures caused by fire, the concrete undergoes a sequence of physical and chemical structure changes causing a mechanical degradation. This paper concerns an experimental strength determination of a temperature stressed concrete. The concrete was temperature loaded according to temperature-time curve ISO 834 and left on a top temperature level for 60 minutes afterwards. This temperature heating rise is in accordance with a common fire expansion in a structure. The concrete panels sized 150 × 1300 × 2300 mm were temperature loaded up to 550, 600, 800 a 1000 °C in a horizontal position in gas furnace for fire testing of structure elements in research Centre AdMaS. The temperatures of the gas in the furnace and the panel was measured during the whole experiment by using the thermocouples. After the fire test, the specimens were drilled out using a 100 mm diameter core drill. The compressive strength and splitting tensile strength tests were made and the results were compared to the reference specimen’s test results. The objective results of a commonly used strength class concrete loaded by elevated temperature corresponding to the real fire exposure differ common linear heat exposure test results and are considered being very valuable.

While exposed to high temperatures caused by fire, the concrete undergoes a sequence of physical and chemical structure changes causing a mechanical degradation. This paper concerns an experimental strength determination of a temperature stressed concrete. The concrete was temperature loaded according to temperature-time curve ISO 834 and left on a top temperature level for 60 minutes afterwards. This temperature heating rise is in accordance with a common fire expansion in a structure. The concrete panels sized 150 × 1300 × 2300 mm were temperature loaded up to 550, 600, 800 a 1000 °C in a horizontal position in gas furnace for fire testing of structure elements in research Centre AdMaS. The temperatures of the gas in the furnace and the panel was measured during the whole experiment by using the thermocouples. After the fire test, the specimens were drilled out using a 100 mm diameter core drill. The compressive strength and splitting tensile strength tests were made and the results were compared to the reference specimen’s test results. The objective results of a commonly used strength class concrete loaded by elevated temperature corresponding to the real fire exposure differ common linear heat exposure test results and are considered being very valuable.

strength, concrete, elevated temperatures

strength, concrete, elevated temperatures

ROZSYPALOVÁ, I.; DANĚK, P.; ŠIMONOVÁ, H.; KERŠNER, Z.

2018

24.05.2017

EDP Sciences

France

MATEC Web of Conferences: Dynamics of Civil Engineering and Transport Structures and Wind Engineering – DYN-WIND’2017

2261-236X

MATEC web of conferences

107

Francouzská republika

1

8

8

https://www.matec-conferences.org/articles/matecconf/abs/2017/21/matecconf_dyn2017_00041/matecconf_dyn2017_00041.html

http://hdl.handle.net/11012/196428

matecconf_dyn2017_00041