The Effects of Reactive MgO on the Mechanical Properties of Rock Flour Mortar

  • Ali HeidariEmail author
  • Masoumeh Hashempour
  • Hamed Javdanian
  • Mohammad Reza Nilforoushan
Research paper


In this study, mechanical properties of rock flour mortar were investigated through experimental studies. The tests results were employed to assess compressive strength, water absorption and specific gravity of rock flour mortar in the presence of reactive MgO. The results showed that the use of rock flour-to-cement ratio of 1.5 with 2.5% magnesium oxide had the maximum compressive strength and adding more MgO to mortar could not play an effective role in strength property. Water absorption also increased with increasing amounts of magnesium oxide for almost all of the samples. In this study, the lowest water absorption was 11.16% for the sample containing 2% magnesium oxide and rock flour-to-cement ratio of 2.5. The specific gravity of the samples also increased with an increase in the amount of magnesium oxide which varied between 16.2 and 2.4 g/cm3. The field emission scanning electron microscope and energy-dispersive X-ray spectroscopy tests were also used to verify the results. In addition, backpropagation neural network was used for better parameter estimation. This network showed better precision for predicting the 28th day compressive strength with 0.936 regression.


Mechanical properties Mortars Magnesia Rock flour 


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Copyright information

© Shiraz University 2018

Authors and Affiliations

  • Ali Heidari
    • 1
    Email author
  • Masoumeh Hashempour
    • 1
  • Hamed Javdanian
    • 1
  • Mohammad Reza Nilforoushan
    • 2
  1. 1.Department of Civil EngineeringShahrekord UniversityShahrekordIran
  2. 2.Department of Materials EngineeringShahrekord UniversityShahrekordIran

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