Numerical and Experimental Study of In-Situ Methods to Evaluate the Mechanical Properties of Fiber-Reinforced Mortars

Document Type : Research Article


Department of Civil Engineering, Imam Khomeini International University, Qazvin, Iran


Nowadays, it is significantly important to perform in situ methods to evaluate the quality of cement materials. The present study tried to use semi destructive "friction transfer" and "Pull-off" methods to evaluate the compressive and flexural strength of polypropylene fiber-reinforced cement mortars at different ages. Therefore, the relationship between compressive and flexural strength of fiber-reinforced mortars and readings of "friction transfer" and "Pull-off" tests is presented here. Results of these tests were extracted at ages of 3, 7, 28, 42, and 90 days and compared with the compressive and flexural strengths of the fiber-reinforced mortars. The calibration curve graphs were presented by linear and power regression analysis. A total of 120 cubic specimens with a size of 50 mm, 60 prismatic specimens with a size of 40*40*160 mm, and 80 cubic specimens with a size of 150 mm were fabricated for compressive, flexural, and in-situ tests, respectively. Also, the distribution of stresses and the propagation of crack were studied through the abovementioned tests using the finite element method and modeling with the ABAQUS software, and compared with the experimental results. The results showed that there was a high correlation between the readings of the "friction transfer" and "Pull-off" tests, and between the compressive and flexural strengths of the fiber-reinforced cement mortars. Moreover, the addition of fibers improved the behavior of cement mortars subjected to compression, and the finite element method was highly consistent with the experimental results.


Main Subjects

  1. Alsadey, and M. Salem, Influence of Polypropylene Fiber on Strength of Concrete. American Journal of Engineering Research, 5(7) (2016) 223-226.
  2. Alam, I. Ahmad, and F. Rehman, Experimental Study on Properties of Glass Fiber Reinforced Concrete, International Journal of Engineering Trends and Technology 24(6) (2015) 297-301.
  3. ACI Committee 544, State-of-the-Art Report on Fiber Reinforced Concrete, Concr. Int., ACI Manual of Concrete Practice, Part 5, Report 544.1R-96 (2009).
  4. S. Shakir, and M.E. AL-Azaawee, Effect of Polypropylene Fibers on Properties of Mortar Containing Crushed Brick as Aggregate. Journal of engineering and technology 26(12) (2008) 1508-1513.
  5. A. Mesbah, and U.F. Buyle-Bodin, Efficiency of polypropylene and metallic fibers on control of shrinkage and cracking of recycled aggregate mortars. Construction and Building Materials 13 (1999) 439-447.
  6. Sadrmomtazi, and A. Fasihi, Influence of polypropylene fibers on the performance of nano-sio2-incorporated mortar. Iranian Journal of Science & Technology, Transaction B: Engineering 34 (2010) 385-395.
  7. A. S. Mohamed, Effect of polypropylene fibers on the mechanical properties of normal concrete. Journal of Engineering Sciences, Assiut University 34 (2006) 1049-1059.
  8. S.Dharan, and A. Lai, Study the effect of polypropylene fiber in concrete. International Research Journal of Engineering and Technology 3(6) (2016) 616-619.
  9. S. Vairagade, K. S. Kene, and N. V. Deshpande, Investigation on compressive and tensile behavior of fibrillated polypropylene fibers reinforced concrete. International Journal of Engineering Research and Applications 2(3) (2012) 1111-1115.
  10. Santandrea, I. A. O. Imohamed, H. Jahangir, C. Carloni, C. Mazzotti, S. De Miranda, and P. Casadei, An investigation of the debonding mechanism in steel FRP-and FRCM-concrete joints. In 4th Workshop on the new boundaries of structural concrete (2016) 289-298.
  11. Bagheri, A. Chahkandi, and H. Jahangir, Seismic Reliability Analysis of RC Frames Rehabilitated by Glass Fiber-Reinforced Polymers. International Journal of Civil Engineering, 17(11) (2019) 1785-1797.
  12. Jahangir, and M. R. Esfahani, Investigating loading rate and fiber densities influence on SRG-concrete bond behavior. Steel and Composite Structures, 34(6) (2020) 877-889.
  13. ASTM C42 / C42M-18a, Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete. ASTM International, West Conshohocken, PA, (2018).
  14. Masi A. Digrisolo, and G. Santarsieo, Experimental evaluation of drilling damage on the strength of cores extracted from RC buildings. Proceedings of World Academy of Science, Engineering and Technology 7(7) (2013) 749.
  15. ASTM C900-15, Standard Test Method for Pullout Strength of Hardened Concrete. ASTM International, West Conshohocken, PA, (2015).
  16. ASTM C597-16, Standard Test Method for Pulse Velocity through Concrete, ASTM International, West Conshohocken, PA, (2016).
  17. ASTM C805/C805M-18, Standard Test Method for Rebound Number of Hardened Concrete. ASTM International, West Conshohocken, PA, (2018).
  18. Naderi, Assessing the Insitu Strength of Concrete, Using new Twist-off Method. International Journal of Civil Engineering 4(2) (2006) 146-155.
  19. Naderi, Adhesion of different concrete repair systems exposed to different environments. The Journal of Adhesion 84(1) (2008) 78–104.
  20. Naderi, New Method for Nondestructive Evaluation of Concrete Strength. Australian Journal of Basic and Applied Sciences 7(2) (2013) 438-447, 2013.
  21. Naderi, and R. Shibani, New Method for Nondestructive Evaluation of Concrete Strength. Australian Journal of Basic Applied Sciences 7(2) (2013) 438-447.
  22. Naderi, Friction-Transfer Test for the Assessment of in-situ Strength & Adhesion of Cementitious Materials. Construction & Building Materials 19(6) (2005) 454-459.
  23. Naderi, An alternative method for in situ determination of rock strength. Canadian Geotechnical Journal 48 (2011) 1901-1905.
  24. Naderi, Evaluating in situ shear strength of bituminous pavements. In Proceedings of the institution of Civil Engineering, (2006) 61-65.
  25. Naderi, O. Ghodousian, Adhesion of Self-Compacting Overlays Applied to Different Concrete Substrates and Its Prediction by Fuzzy Logic, The Journal of Adhesion 88(10) (2012) 848-865.
  26. Naderi, Effects of Cyclic Loading, Freeze-Thaw and Temperature Changes on Shear Bond Strengths of Different Concrete Repair Systems. The Journal of Adhesion 84(9) (2008) 743-763.
  27. ASTM C127, Standard test method for density, relative density (specific gravity), and absorption of fine aggregate. West Conshohocken PA, American Society for Testing and Materials, (2012).
  28. P. Beer, E. R. Johnston, J. T. Dewolf, and D. F. Mazurek, Mechanics of Materials. McGraw-Hill Education; 7th Edition (2014).
  29. ASTM C109, Standard test method for compressive strength of hydraulic cement mortars (using 2-in. or [50-mm] cube specimens), American Society for Testing and Materials, (2013).
  30. ASTM C348-19, Standard test method for Flexural Strength of Hydraulic-Cement Mortars. West Conshohocken PA, American Society for Testing and Materials, (2012).