Influence of steel and/or polypropylene fibres on the behaviour of concrete at high temperature: Spalling, transfer and mechanical properties

详细信息    查看全文

• 作者：N. Yermak^a ; ; P. Pliya^a ; A.-L. Beaucour^a ; ^{anne-lise.beaucour@u-cergy.fr} ; A. Simon^b ; A. Noumowé ; ^a
• 关键词：High temperatures ; Concrete ; Polypropylene fibres ; Steel fibres ; Fire spalling ; Pore size ; Permeability ; Thermal properties ; Mechanical damage
• 刊名：Construction and Building Materials
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：132
• 期：Complete
• 页码：240-250
• 全文大小：3205 K
• 卷排序：132

文摘

Ten different concretes with polypropylene and/or steel fibres are exposed to ISO 834 fire. Plain concrete (fc = 70 MPa) did not show spalling contrary to steel fibres (60 kg/m3) concretes. Polypropylene fibres prevent any macroscopic damage of steel fibre concretes during ISO fire. SEM observation and MIP analysis show that steel fibres reduce the crack opening during heating. At 900 °C steel fibres have more favorable effect on the residual mechanical performances.