The experimental assessment of the effect of polypropylene fibers on the improvement of nano-silica concrete behavior

Document Type : Research Article

Authors

1 Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran

2 Department of Textile Engineering, Arak Branch, Islamic Azad University, Arak, Iran

3 Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, Iran

Abstract

In this study the influence of water-cement ratio on the mechanical properties (compressive, abrasion, tensile, flexural strength and permeability) of Nano-silica concrete reinforced with polypropylene fibers is evaluated. The specimens contain 4% of Nano-silica, 0.30, 0.35, 0.40, 0.45 and 0.50 of water-cement ratios and 0, 0.10, 0.15, 0.25 and 0.35 percent by volume of polypropylene fibers. Other design features remained fixed in all concrete samples. The results of the experiments showed that with decreasing the ratio of water to cement from 0.50 to 0.30, all the mechanical properties of the concrete were improved. In addition, the test results showed a significant increase in mechanical properties improvement of concrete by using polypropylene fibers. Tensile strength, flexural strength and abrasion resistance of concrete increased up to 22%, 40%, and 27% respectively for 28 days age specimens. Also, considerable reduction of hydraulic conductivity coefficient to 51% indicates high durability of these types of concrete. Compressive strength had increment of 22%, 15% and 14% for 7, 28 and 90 days age specimens respectively.

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References

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Scientia Iranica
Volume 27, Issue 2
Transactions on Civil Engineering (A)
March and April 2020
Pages 682-692

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History

  • Receive Date: 26 February 2018
  • Revise Date: 12 March 2018
  • Accept Date: 29 May 2018

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