Enhancing the mechanical properties of fiber reinforced geopolymer concrete

Sara Mustafa, Said Elkholy, Hilal El-Hassan, Mona Megahed, Esma Vall, Halas Alshehhi

Research output: Contribution to journalConference articlepeer-review


Cement production causes approximately 5% of the global annual carbon dioxide (Co2) emissions. The production of one ton of Portland cement leads to the emission of 1.1 tons of CO2,vapors, dust and other harmful gases. Recently, cement replacement by eco-friendly and sustainable concrete materials in building construction, such as Geopolymer Concrete (GPC), has been increasingly used. The GPC is a “new” construction material produced through the activation of fly ash in alkaline solution. Past research has focused on parametric studies and the mechanical properties of normal and lightweight GPC and mortars. To overcome the brittleness with the low tensile strength of GPC, the present investigation focuses on the mechanical performance of steel-fiber reinforced GPC. The mechanical properties compressive and splitting tensile strengths, flexural strength, and elastic modulus were examined using two hundred forty GPC samples. The steel fibers were added at different volume fraction ratios. A total of twelve geopolymer concrete mixes were prepared with varying SH molar concentrations and fiber volume fractions. The experimental results showed that adding steel fiber results in superior improvement of the flexural strength.

Original languageEnglish
Pages (from-to)165-169
Number of pages5
JournalProceedings of the Annual International Conference on Architecture and Civil Engineering
Publication statusPublished - 2019
Event7th Annual International Conference on Architecture and Civil Engineering, ACE 2019 - Singapore, Singapore
Duration: May 27 2019May 28 2019


  • Compressive Strength
  • Flexural Strength
  • Geopolymer Concrete
  • Mechanical Properties
  • Modulus of Elasticity
  • Splitting Tensile Strengths
  • Steel Fiber

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Architecture


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