Publication detail

Research of the Processes of High Temperature Influence on Cementitous Concrete

BODNÁROVÁ, L. VÁLEK, J. SITEK, L. FOLDYNA, J.

Original Title

Research of the Processes of High Temperature Influence on Cementitous Concrete

English Title

Research of the Processes of High Temperature Influence on Cementitous Concrete

Type

journal article - other

Language

en

Original Abstract

The paper focuses on analysis of behaviour of cement composite materials (concrete) exposed to high temperatures. Experimental work was focused on designing and verification of mix-design with higher resistance to action of high temperature. Concrete specimens were exposed to thermal load at the temperatures 200 C, 400 C, 600 C and 900 C with isothermal dwell 60 minutes. After exposition to high temperature, physical-mechanical properties were tested and compared to reference specimens, which were not exposed to high temperature. Surface of testing specimens was analyzed and percent damage of surface was defined. Concrete mix-designs with components aimed at increasing fire resistance showed the least drop of compressive strength. Concrete with quartz sand and greywacke aggregate with no components enhancing fire resistance showed the most significant changes of compressive strength and appearance. Combination of fibers and basalt aggregate had positive effect compared to using only basalt aggregate.

English abstract

The paper focuses on analysis of behaviour of cement composite materials (concrete) exposed to high temperatures. Experimental work was focused on designing and verification of mix-design with higher resistance to action of high temperature. Concrete specimens were exposed to thermal load at the temperatures 200 C, 400 C, 600 C and 900 C with isothermal dwell 60 minutes. After exposition to high temperature, physical-mechanical properties were tested and compared to reference specimens, which were not exposed to high temperature. Surface of testing specimens was analyzed and percent damage of surface was defined. Concrete mix-designs with components aimed at increasing fire resistance showed the least drop of compressive strength. Concrete with quartz sand and greywacke aggregate with no components enhancing fire resistance showed the most significant changes of compressive strength and appearance. Combination of fibers and basalt aggregate had positive effect compared to using only basalt aggregate.

Keywords

Concrete, high temperature, thermal-load resistance, polypropylene fibers, cellulose fibers, explosive spalling

RIV year

2013

Released

04.02.2013

Publisher

American Scientific Publishers

Location

USA

ISBN

1936-6612

Periodical

ADV SCI LETT

Year of study

19

Number

2

State

US

Pages from

500

Pages to

503

Pages count

4

Documents

BibTex


@article{BUT96502,
  author="Lenka {Bodnárová} and Jaroslav {Válek} and Libor {Sitek} and Josef {Foldyna}",
  title="Research of the Processes of High Temperature Influence on Cementitous Concrete",
  annote="The paper focuses on analysis of behaviour of cement composite materials (concrete) exposed to high temperatures. Experimental work was focused on designing and verification of mix-design with higher resistance to action of high temperature. Concrete specimens were exposed to thermal load at the temperatures 200 C, 400 C, 600 C and 900 C with isothermal dwell 60 minutes. After exposition to high temperature, physical-mechanical properties were tested and compared to reference specimens, which were not exposed to high temperature. Surface of testing specimens was analyzed and percent damage of surface was defined. Concrete mix-designs with components aimed at increasing fire resistance showed the least drop of compressive strength. Concrete with quartz sand and greywacke aggregate with no components enhancing fire resistance showed the most significant changes of compressive strength and appearance. Combination of fibers and basalt aggregate had positive effect compared to using only basalt aggregate.",
  address="American Scientific Publishers",
  chapter="96502",
  institution="American Scientific Publishers",
  number="2",
  volume="19",
  year="2013",
  month="february",
  pages="500--503",
  publisher="American Scientific Publishers",
  type="journal article - other"
}