Significant information is available on normal rust in literature, however little is known about ... more Significant information is available on normal rust in literature, however little is known about black rust. Black rust is hard to detect as it does not have any tell-tale signs such as cracking, rust stains and spalling usually associated with normal rust. As an asset owner it is critical that such corrosion activity is picked up and thereby repair procedures can be carried out and the service life of the structure is not jeopardized. Such timely repairs would avoid catastrophic failure, expensive repairs or need for a new structure. Thus this study intends to alert the bridge inspectors and engineering community about the danger of significant steel section loss due to black rust without any visible signs of the concrete deterioration. Also the type of structures and environment where such corrosion can happen is highlighted so that the bridge inspectors are cognizant of it and do not miss such occurrence during their bridge inspections. A recent durability investigation of two cu...
After bridge fire events, the main task of engineers would be opening the bridge to traffic as qu... more After bridge fire events, the main task of engineers would be opening the bridge to traffic as quickly as possible without compromising the structural integrity of the bridge or the safety of road users. The recently published AS 5100.8 provides some guidance for assessment of bridge materials including steel, concrete, masonry and timber. However, the type and extent of required tests depend on the results of the preliminary inspection by specialist engineers and asset owners’ strategic decisions considering the criticality of a bridge on the roads network. Therefore, there is a need for an efficient design of testing in order to ensure that the materials properties have not been jeopardised due to the fire within the limited allocated time-frame of bridge traffic closure. This task becomes more complex in cases that the vehicular impact causes a fire as steel losses about half of its strength when the temperature rises to almost half of the melting temperature. This paper presents...
Significant information is available on normal rust in literature, however little is known about ... more Significant information is available on normal rust in literature, however little is known about black rust. Black rust is hard to detect as it does not have any tell-tale signs such as cracking, rust stains and spalling usually associated with normal rust. As an asset owner it is critical that such corrosion activity is picked up and thereby repair procedures can be carried out and the service life of the structure is not jeopardized. Such timely repairs would avoid catastrophic failure, expensive repairs or need for a new structure. Thus this study intends to alert the bridge inspectors and engineering community about the danger of significant steel section loss due to black rust without any visible signs of the concrete deterioration. Also the type of structures and environment where such corrosion can happen is highlighted so that the bridge inspectors are cognizant of it and do not miss such occurrence during their bridge inspections. A recent durability investigation of two cu...
After bridge fire events, the main task of engineers would be opening the bridge to traffic as qu... more After bridge fire events, the main task of engineers would be opening the bridge to traffic as quickly as possible without compromising the structural integrity of the bridge or the safety of road users. The recently published AS 5100.8 provides some guidance for assessment of bridge materials including steel, concrete, masonry and timber. However, the type and extent of required tests depend on the results of the preliminary inspection by specialist engineers and asset owners’ strategic decisions considering the criticality of a bridge on the roads network. Therefore, there is a need for an efficient design of testing in order to ensure that the materials properties have not been jeopardised due to the fire within the limited allocated time-frame of bridge traffic closure. This task becomes more complex in cases that the vehicular impact causes a fire as steel losses about half of its strength when the temperature rises to almost half of the melting temperature. This paper presents...
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Papers by Hamid Fatemi