Estimation of the experimental relationship between compressive strength and electrical resistivity of permeable concrete surface for use in roads and bridges decks drainage

Document Type : Research Paper

Authors

1 Assistant Professor, Department of Road and Transportation Engineering, Faculty of Civil Engineering, Iran University of Science and Technology , Tehran, Iran.

2 M. Sc. Student of Civil Engineering, Lashte Nesha Azad University

3 Assistant Professor, Department of Civil Engineering, Faculty of Engineering, University of Guilan.

Abstract

Permeable concrete or porous concrete, due to its interconnected cavities, allows high-speed ‎water to pass from the surface to the lower layers. Although one of the main characteristics of ‎conventional cement composites is their impermeability, permeable concrete can be used for ‎special applications such as parking and road pavements. According to the issues associated ‎with the use of impermeable surfaces in cities such as storm water runoff and improper water ‎supply to groundwater aquifers, it is anticipated that in near future a rise in permeable ‎concrete applications will occur. In this research, permeable mortar specimens containing ‎different replacement values of silica fume (up to 20%) were fabricated. To evaluate the bond ‎between aggregates and cement paste in permeable pavements, electrical resistivity of ‎permeable‏ ‏mortars cured in two different conditions namely lime-water and NaCl solution ‎was measured. The tests including compressive strength, electrical resistivity and permeability ‎were performed on the specimens. The aim was to find a balance between mechanical and ‎hydraulic properties of permeable‏ ‏mortars and extracting a relationship between compressive ‎strength and electrical resisitivty of such cement composites. Results showed that specimens ‎containing coarser aggregate had better performance in compressive strength and electrical ‎resistivity tests. Also, the processing of samples in salt water greatly reduced the electrical ‎resistance of the samples, so that even after 90 days of processing, the samples rarely showed ‎resistance above 10 Ω.m. A meaningful linear correlation was found between electrical ‎resistivity and compressive strength of permeable ‎mortars.‎

Keywords

References

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Journal of Transportation Infrastructure Engineering
Volume 6, Issue 2 - Serial Number 22
September 2020
Pages 21-44

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History

  • Receive Date: 27 April 2020
  • Revise Date: 27 May 2020
  • Accept Date: 18 June 2020

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