Regression Analysis of Concrete Permeability Containing Different Kinds of Aggregates and Cement Pastes

Document Type : Original Article

Authors

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

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

Abstract

Investigating the effect of cement paste and aggregate on concrete permeability is of great importance. So, in this paper, the results of the permeability of 28-day concrete specimens containing granite, andesite, siliceous, limestone, marble and tuff aggregates and cement pastes without / with silica fume, fly ash, zeolite and limestone powder admixtures are presented. In this investigations, concrete permeability is measured using “Cylindrical chamber” method and surface strength of rocks and cement pastes is measured using “Twist-off” method. The obtained results show a linear correlation between the compressive and surface strength of rocks and cement pastes with coefficient of determinations higher than 0.9. Regarding the permeability, it was observed that the concrete containing granite aggregates and silica fume has the highest permeability and the concrete containing tuff aggregates and type 2 Portland cement has the lowest permeability. A regression analysis for estimating the penetrated water volume into the concrete specimens, regarding compressive and surface strength of the rocks and cement pastes, water absorption and saturated surface dry density of the rocks is also presented. Penetrated water volume into the concrete specimens can be estimated using the regression model.

Keywords

Asas Journal
Volume 22, Issue 59
Summer 2020
September 2020

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History

  • Receive Date: 22 January 2020
  • Revise Date: 29 December 2020
  • Accept Date: 22 February 2021

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