20 years of experience in research, lecturing, and consulting and has been with the ACCI (BRC) over the past 12 years.

Main research and consulting areas are corrosion of steel reinforcement in concrete structures, concrete durability and repair strategies in marine and sewer environments, and high performance concrete, repair mortar and flow grout.

• Invented a unique technique of "Potential Curvature Method" and use it in analysis of half-cell potential survey results to effectively identify corroding "hot spots" in concrete structures either in marine environments or affected by carbonation.

• Conduct on-site corrosion rate testing of reinforcement in concrete structures based on Linear Polarisation Resistance (LPR) technique with the GECOR system consisting of the "guard-ring" device.

• Analyse chloride profile in concrete for diffusion coefficient and predict time for chloride to approach the threshold value at the reinforcement level.

• A four-year research project to investigate "corrosion of reinforcement in the crack zones of concrete structures in marine environments" (1999 - current).

• A collaborated two-year research project on properties of concretes with special admixtures (2001- current).

• Properties and deterioration of selected concrete, mortar and coating systems in sulphuric acid environments (2001- current).

• "Properties of fresh and hardened concrete with Binary Cement system containing silica fume, fly ash and slag" (1996-1998). The 123-pages BRC report is available.

• "Properties of fresh and hardened concrete with Ternary Cement system containing silica fume, fly ash and slag" (1997-1998). The 112-pages BRC report is available.

• Development of the BRC "Cyclic Chloride Penetration Test", which has been included in Appendix-A of the "Performance Criteria for Concrete in Marine Environments" published by the Concrete Institute of Australia in Nov. 2001.

• As a principle designer in development of the BRC "Combined Ring Test" for performance evaluation of repair mortar under restrained shrinkage conditions.

Commercial Experience

• Has been one of the principal consultants in the ongoing annual program of "Sydney Harbour Tunnel Asset Protection Strategy" since 1993, and currently undertaking investigations in the 9th annual program.

• As a principal consultant in a comprehensive condition investigation of the Jones Bay wharf and its superstructure (2001).

• Has involved since 1992 in the investigation and remediation of several major concrete marine structures, including the wharfs of the HMAS Platypus at Neutral Bay and the Bulk Liquid Berth at Botany Bay.

• As a consultant of the team in investigation and remediation of several major sewer structures including Ginninderra Tunnel, ACT (1996), West Belconnen Trunk Sewer, ACT (1997), Maroubra Storm water culvert channel (1999) and Spur line Porters Creek culvert system (2000).

• Has involved in the investigation and repair of several commercial complexes and residential buildings since 1992.

• Chang, Z. T., Cherry, B. and Marosszeky, M., "Potential Curvature Method - A new Approach for Corrosion Assessment in Concrete Structures", the 9th International Conference on Durability of Building Materials & Components (9DBMC), Brisbane, Australia, March, 2002.

• Marosszeky, M., Chang, Z. T., Munn, R. L., Cox, I., Cherry, B. and Walters, P., "Sydney Harbour Tunnel - Technical Aspects of Asset Maintenance Strategies for Long Term Serviceability", 9DBMC, Brisbane, Australia, March, 2002.

• Chang, Z. T, Cherry, B and Marosszeky, M., "Influences of Crack Width on Macrocell Corrosion of Steel Reinforcement in Concrete Beams Immersed in Seawater", the 41st Conference of Australasian Corrosion Association, Proceedings of " Corrosion And Prevention -2001", Newcastle, Australia, November 2001.

• Chang, Z. T, Marosszeky, M. and Munn, R., "Setting Time and Bleeding of Concrete with Binary and Ternary Cements Containing Silica Fume, Fly Ash and Slag", the 20th Biennial Conference of the Concrete Institute of Australia, Proceedings of "Adding Value Through Innovation", Perth, September 2001.

• Munn, R., Chang, Z. T. and Marosszeky, M., "Contemporary Design of Concrete for Durability", the 20th Biennial Conference of the Concrete Institute of Australia, Proceedings of "Adding Value Through Innovation", Perth, September 2001.

• Munn, Robert L. and Chang, Zhen-Tian, "Evaluating the Durability of New and Existing Australian Maritime Structures", the 3rd Annual Conference on "Maritime Structures 2001", Sydney, December 2001.

• Chang, Z. T, Cherry, B.W. and Marosszeky, M., "Macrocell and Microcell Corrosion of Steel Reinforcement in the Concrete Crack Zones", Australasian Corrosion Association, "Corrosion and Prevention-2000", Auckland, New Zealand, November 2000.

• Chang, Z. T and Marosszeky, M., "Temperature Development due to Heat of Hydration in Concrete Containing Silica Fume, Fly Ash or Slag", Concrete Institute of Australia, the 19th Biennial Conference "Concrete99", Sydney, May 1999.

• Chang, Z.T. and Marosszeky, "Properties of Fresh and Hardened Concrete with the Ternary Binder System Containing Two Supplementary Cementitious Materials", Research Report, The Building Research Centre, UNSW, Sep. 1998, 112pp.

• Chang, Z.T., Marosszeky, M. and You-Jin Kim, "Properties of Fresh and Hardened Concrete with the Binary Binder System Containing Silica Fume, Fly Ash or Slag", Research Report, The Building Research Centre, UNSW, June 1998, 123pp.

• Chang, Z. T., Marosszeky, M. and Scerri, R. "Combined Ring Test for Performance Assessment of Repair Materials", BRC Research, November, 1995, 59pp.