Scientific Quarterly Journal of Iranian Association of Engineering Geology

Scientific Quarterly Journal of Iranian Association of Engineering Geology

Evaluation of soil corrosion hazard in Mashhad city

Document Type : Original Article

Authors
1 Department of Geology, Ferdowsi University, Mashhad, Iran
2 Department of Geology, Shahroud Industrial University, Shahroud, Iran,
3 Assistant professor, Department of Engineering Geology, Tarbiat Modares University, nikudelm@modares.ac.ir
Abstract
One of the important problems of municipal management is the corrosion of buried concrete and
steel pipe such as water and Gas pipe and Foundation of structures. The corrosion phenomena
existed in all type of soils and its severity are related to properties of soil and environment. In this
study, the effective parameters on soil corrosive are induced and the surface soil characteristics in
Mashhad city are investigated. Based on the cumulative effects of five parameters of texture, PH,
Cl-, SO4-2 and electric specific strength, the soil corrosive zonation map of Mashhad city are
produced. The data bank includes more than 700 boreholes and the geoelectrical study achieved in
different projects in the city. The results show that the most surface soil under Mashhad city area
are classified as medium to low corrosive soil and only small part of east, north east and central part
of Mashhad city have the high corrosion potential. The high corrosion hazard mainly coincide with
area covered by the demolition and construction soils in bank of streams and out of city in past.
Keywords
Subjects

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Volume 3, Number 1 & 2
September 2010
Pages 31-40

  • Receive Date 25 June 2008
  • Revise Date 19 March 2009
  • Accept Date 27 January 2010