Saleh, A & Parsanejad, S 1996, 'Application of orthogonalised load/deflection states to the collapse behaviour of grout-filled damaged tubular members', Structural engineering review, vol. 8, no. 2-3, pp. 269-275.
View description>>
Framed off-shore structures are normally made of tubular members. These members are prone to damage by collision from supply boats or by the impact of dropped objects. Experimental and theoretical work has indicated that such damage can cause a significant loss of member strength and the grouting is an effective way of repair for tubular members with a moderate degree of damage. An existing numerical approach based on the method of orthogonalised load/deflection states has been successfully employed to establish the pre- and post-ultimate force/displacement relationships of damaged tubes and grout-filled damaged tubes. The paper comprises an explanation of the analytical method used, adaptation of the method for analysis of fully grout-filled damaged tubes and the presentation of the results. A comparison is made between the experimental and analytical results.
Szuladzinski, G & Saleh, A 1996, 'Analysis of braking a cylindrical boulder and application to bench blasting', Acta Mechanica, vol. 115, no. 1-4, pp. 79-85.
View/Download from: Publisher's site
Thomas, PS 1996, 'Dependence of the friction process on the molecular structure and architecture of thin polymer films', Tribology International, vol. 29, no. 8, pp. 631-637.
View/Download from: Publisher's site
Baweja, D, Roper, H & Sirivivatnanon, V 1970, 'Corrosion of steel in marine concrete: Long-term half-cell potential and resistivity data', American Concrete Institute, ACI Special Publication, pp. 89-110.
View description>>
This paper presents some results from a major research project carried out on corrosion of steel reinforcement in concrete. The performance of a range of Portland and blended cement concretes containing fly ash and blast furnace slag exposed to simulated marine conditions was evaluated over a period of six years. A large amount of data relating to corrosion of embedded steel in concrete was obtained in this project. Long-term half cell potential data on reinforcement within concrete slabs and resistivity data on the same concrete specimens has been considered in detail in this paper. Rates of corrosion of steel in concrete were also measured using potentiodynarnic anodic polarization procedures. Trends observed in the data were different for the portland and blended cement concretes investigated. It was found that concrete resistivity may influence the measured half cell potential of steel in concrete. This factor needs to be taken into account for half cell potential data interpretations.
Sirivivatnanon, V, Marsh, P & Nelson, P 1970, 'Field performance of portland cement and fly ash concrete subjected to flowing seawater', American Concrete Institute, ACI Special Publication, pp. 463-479.
View description>>
The concrete lining the outfall canal of Munmorah Power Station, built by the Electricity Commission of New South Wales (now operating as Pacific Power) in the mid-1960s, has been subjected to flowing sea water for 30 years. Two type of concretes, a portland-cement concrete and a fly-ash concrete, were used for the construction of the canal. This presented an ideal opportunity for a comparison to be made of the performance of the two binders in concretes which were subjected to the same aggressive environment. Limited information was available on the concretes from trial mixture records. A recent field investigation revealed similar chloride ingress into the two concretes in the tidal zone. This was so despite the fact that the fly-ash concrete had a lower binder content than the portland-cement concrete. As such, a lower strength grade and hence a fly-ash concrete with higher water permeability can perform as well as a portland-cement concrete. In the dry area above the high tide mark, the carbonation depth of the fly-ash concrete was greater than the portland-cement concrete. No corrosion was found in any reinforcing steel as there were sufficient cover in both concretes to prevent the chloride ions or carbonation front reaching the steel. The effectiveness of a number of investigative techniques was evaluated during the investigation. It was found that the apparent chloride diffusion coefficients, determined from short-term immersion, the water permeability coefficients, and copper to copper sulfate half-cell potential measurements were poor indicators of the real long-term performance.
