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Experimental Study on the Effect of Aggregates Matrix, Admixture and Water-Cement Ratio on Mechanical and Physical Properties of High Performance Concrete

Author Affiliations

  • 1Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Poonak, Hesarak, Tehran, IRAN
  • 2Dept. of Civil Eng., Tarbiat Modres University, 14115-111, Tehran, IRAN

Res. J. Recent Sci., Volume 4, Issue (12), Pages 7-16, December,2 (2015)

Abstract

In this study, the combined effects of microsilica weighted ratio content, fineness modulus and water-cement ratio on physical and mechanical properties of concrete were investigated. For determination the effects of microsilica weighted ratio content on concrete parameters in different water-cement ratios and particle size distributions, 5 different microsilica weighted ratio contents, 3 water-cement ratios and 3 particle size distributions, were selected and totally 45 mix designs were prepared and subjected to slump test and compressive strength, tensile strength and modulus of elasticity tests. Obtained results show a direct relationship between microsilica weighted ratio content and physical and mechanical properties of concrete. Increase in microsilica content from 0% to 10 % in all water-cement ratios and fineness modulus, leads to slump decrease and mechanical parameters increase, while from 10 % to 20 % of microsilica content, mechanical properties fall down, but the reduction trend of slump continues. Also it can be seen that the effect of different weighted of microsilica, on physical and mechanical properties of concrete, reduces by increasing in water-cement ratio and intensifies with increment of fineness modulus of fine aggregates.

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