Influence of polypropylene and steel fibres on thermal spalling and physical-mechanical properties of concrete under different heating rates

Autor: Albert Noumowé, A. Simon, Anne-Lise Beaucour, P. Pliya, N. Algourdin
Přispěvatelé: Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne (ENISE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de mécanique et matériaux du génie civil (L2MGC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), CCSD, Accord Elsevier, Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS), Groupe Eiffage
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Fire test
Materials science
[SPI] Engineering Sciences [physics]
0211 other engineering and technologies
Modulus
020101 civil engineering
02 engineering and technology
High temperatures
0201 civil engineering
Steel fibres
chemistry.chemical_compound
[SPI]Engineering Sciences [physics]
High-strength concrete
021105 building & construction
Thermal
General Materials Science
Composite material
Civil and Structural Engineering
Polypropylene
Gas permeability
Specimen geometry
Building and Construction
Heating rate
Spall
Polypropylene fibres
Steel fibres
High-strength concrete
Pore pressure
High temperatures
Heating rate
Spalling
Gas permeability
Thermal conductivity
Specimen geometry
Polypropylene fibres
Pore pressure
Spalling
[SPI.GCIV]Engineering Sciences [physics]/Civil Engineering
Compressive strength
Properties of concrete
chemistry
Thermal conductivity
Heat transfer
Zdroj: Construction and Building Materials
Construction and Building Materials, 2020, 259, pp.119690. ⟨10.1016/j.conbuildmat.2020.119690⟩
Construction and Building Materials, 2020, 259, pp.119690-. ⟨10.1016/j.conbuildmat.2020.119690⟩
Construction and Building Materials, Elsevier, 2020, 259, pp.119690-. ⟨10.1016/j.conbuildmat.2020.119690⟩
ISSN: 0950-0618
Popis: International audience; AbstractThis study investigates three concrete compositions: a control concrete, a reinforced concrete containing 60 kg/m3 of steel fibres, and a hybrid concrete containing 60 kg/m3 of steel fibres and 0.75 kg/m3 of polypropylene fibres. Cylindrical specimens were manufactured and subjected to two heating rates (10 °C/min and the ISO 834 fire standard) to study their spalling sensitivity. Moreover, unidirectional heat transfer and pressure measurements were performed on slabs heated at 10 °C/min to 600 °C. To understand the influence of fibres on spalling processes more clearly, the thermal properties were studied during heating and cooling: the gas permeability, compressive strength, and Young’s modulus of specimens were measured after a heating and cooling cycle at 0.5 °C/min. The results show that the spalling phenomenon was more severe for cylindrical specimens than for slabs. The addition of 60 kg/m3 of steel fibres had an unfavourable influence on spalling, especially during the ISO 834 fire test. The addition of 0.75 kg/m3 of polypropylene fibres allowed the concretes containing steel fibres to avoid spalling, regardless of the thermal loading conditions.
Databáze: OpenAIRE
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