STP1137: Repair and Cathodic Protection of Corrosion Damaged Reinforced Concrete Wharves in the Middle East

    John, G
    Technical Development ManagerTechnical DirectorCathodic Protection Manager, CAPCIS LtdTransportation & Marine Group, Sir Alexander Gibb & Partners, Earley HouseTarmac Global, Tarmac Structural Repairs, Granby RowReadingWolverhampton, Manchester

    Leppard, B
    Technical Development ManagerTechnical DirectorCathodic Protection Manager, CAPCIS LtdTransportation & Marine Group, Sir Alexander Gibb & Partners, Earley HouseTarmac Global, Tarmac Structural Repairs, Granby RowReadingWolverhampton, Manchester

    Wyatt, B
    Technical Development ManagerTechnical DirectorCathodic Protection Manager, CAPCIS LtdTransportation & Marine Group, Sir Alexander Gibb & Partners, Earley HouseTarmac Global, Tarmac Structural Repairs, Granby RowReadingWolverhampton, Manchester

    Pages: 18    Published: Jan 1992


    Abstract

    The deep water port of Mina Zayed, Abu Dhabi, was constructed between 1970 and 1978 and consists of pre-cast reinforced concrete beams and slabs with in situ concrete topping, supported by tubular steel piles. The first signs of deterioration were recorded in 1977, evidenced by cracking of the lower corners of the pre-cast beams. A number of detailed inspections were carried out during 1979, 1983, 1985 and 1987, allowing a study of the progressive deterioration to be recorded.

    This paper summarises the construction of the port, the deterioration that occurred and the repair/rehabilitation procedure used. An impressed current cathodic protection system incorporating metal oxide coated titanium mesh in a sprayed concrete overlay was used to prevent further deterioration. The system incorporated 83 individual units providing protection to over 11,000 m2 (121,000 ft2) of concrete.

    A particular problem associated with interference in the polarisation/de-polarisation of the reinforcing steel due to large repaired areas was noted during the repair work and is summarised in this paper.

    Keywords:

    Repair of reinforced concrete, cathodic protection, sprayed concrete, performance criteria


    Paper ID: STP19775S

    Committee/Subcommittee: G01.14

    DOI: 10.1520/STP19775S


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