Mechanical behaviour of steel fibre-reinforced alkali activated slag concrete

Authors

  • S. Bernal Universidad del Valle, Cali
  • R. Mejía de Gutiérrez Universidad del Valle, Cali
  • E. Rodríguez Universidad del Valle, Cali
  • S. Delvasto Universidad del Valle, Cali
  • F. Puertas Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Madrid

DOI:

https://doi.org/10.3989/mc.2009.41807

Keywords:

akali-activated slag concretes, steel fibre, mechanical strength

Abstract


This study addressed the mechanical behaviour of a steel fibre-reinforced alternative concrete made from waterglass (Na2SiO3.nH2O+NaOH)- activated Colombian blast furnace slag. The mixes studied were prepared with 400 kg of cement and the fibres were added in proportions of 40 and 120 kg per cubic metre of concrete. 7-, 14- and 28-day concrete was tested for compressive, splitting tensile and flexural strength. The results obtained showed that adding steel fibre to alkaline concrete lowered early age compressive strength, and that this decline was more intense with rising volumes of steel. Flexural and splitting tensile strength grew, however, enhancing the toughness of the material. As a general rule, the mechanical strength of the plain and fibre-reinforced alkaline concretes studied was higher than exhibited by conventional ordinary Portland cement concrete prepared with similar proportions of cement and fibre.

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Published

2009-03-30

How to Cite

Bernal, S., Mejía de Gutiérrez, R., Rodríguez, E., Delvasto, S., & Puertas, F. (2009). Mechanical behaviour of steel fibre-reinforced alkali activated slag concrete. Materiales De Construcción, 59(293), 53–62. https://doi.org/10.3989/mc.2009.41807

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