Experimental Investigation of the Effect of Micro-Silica and Zeolite on Repair Mortar of Concrete Pavements

  • Saeed Farzin Semnan University
  • Gholam Ali Shafabakhsh Semnan University
  • Ehsan Teymouri Semnan University
  • Mohammad Reza Aeine Heydari Semnan University
  • Mana Motamedi Semnan University

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Abstract

In the recent years, by replacing a part of our country's asphalt pavements with concrete pavements, it is necessary to perform appropriate actions in order to preserve and repair destructions (due to executive weaknesses, loading and environmental conditions) during pavement lifetime. In order to increase mechanical properties and durability of repair mortars, micro-silica and zeolite were used as pozzolan, polypropylene fibers for controlling crack (due to fluctuations in concrete and temperature change) and the cement type 3 for obtaining high resistivity in short-term. In this study, 11 mixing designs were investigated, and the composition of polypropylene fibers with micro-scale thickness with cement complements can be considered as the most optimal mixing design in 0.2% of fibers with 10% micro-silica and 15% zeolite in order to promote effective parameters of elasticity modulus, modulus of rupture and decrease of contraction in repair mortars of concrete pavements. By adding polypropylene fibers, the samples were not completely ruptured in the tension of primary strength that they showed. The samples containing 0.4% fibers with deformation from spherical state to elliptical state with splay value in rupture surface showed individual characteristic which caused minimizing rupture and crunch in the repaired area.

Author Biographies
Saeed Farzin

Faculty of Civil Engineering, Semnan University, Semnan, I. R. of Iran

Gholam Ali Shafabakhsh

Faculty of Civil Engineering, Semnan University, Semnan, I. R. of Iran

Ehsan Teymouri

Faculty of Civil Engineering, Semnan University, Semnan, I. R. of Iran

Mohammad Reza Aeine Heydari

Faculty of Civil Engineering, Semnan University, Semnan, I. R. of Iran

Mana Motamedi

Faculty of Civil Engineering, Semnan University, Semnan, I. R. of Iran

Keywords
polypropylene fibers, micro-silica, zeolite, strong repair mortar, mechanical properties.

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