Khatri, RP & Sirivivatnanon, V 1997, 'Methods for the determination of water permeability of concrete', ACI MATERIALS JOURNAL, vol. 94, no. 3, pp. 257-261.
Khatri, RP, Sirivivatnanon, V & Yang, JL 1997, 'Role of permeability in sulphate attack', CEMENT AND CONCRETE RESEARCH, vol. 27, no. 8, pp. 1179-1189.
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Khatri, RP, Sirivivatnanon, V & Yu, LK 1997, 'Effect of curing on water permeability of concretes prepared with normal Portland cement and with slag and silica fume', MAGAZINE OF CONCRETE RESEARCH, vol. 49, no. 180, pp. 167-172.
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Smallwood, AG, Thomas, PS & Ray, AS 1997, 'Characterisation of sedimentary opals by Fourier transform Raman spectroscopy', SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, vol. 53, no. 13, pp. 2341-2345.
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The Fourier transform Raman (FT-Raman) spectra of a series of opals are presented. The opals characterised derive from a variety of origins in Australia and they are compared to opals originating from North America. The opals are distinguished by their c
Thomas, PS & Stuart, BH 1997, 'A Fourier transform Raman spectroscopy study of water sorption by poly(vinyl alcohol)', SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, vol. 53, no. 13, pp. 2275-2278.
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The Fourier transform (FT) Raman spectrum of poly(vinyl alcohol) (PVA1) is reported. The spectra of PVA1 exposed to different aqueous environments are also reported. The changes to the FT Raman spectrum of PVA1 in the presence of water provide evidence o
Baweja, D, Roper, H & Sirivivatnanon, V 1970, 'Quantitative descriptions of steel corrosion in concrete using resistivity and anodic polarism data', American Concrete Institute, ACI Special Publication, pp. 41-63.
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This paper presents results from a major long-term study on chloride induced steel corrosion in concrete. Specifically, data on concrete resistivity and estimated corrosion rates of steel in concrete have been measured and compared. The performance of 50 reinforced concrete slabs made with a range of portland and blended cement binders was evaluated. A high C3A cement, a low C3A cement a blended fly ash cement and a blended blast furnace slag cement were used. All reinforced concrete slabs were exposed to high chloride conditions by partial immersion in simulated sea water conditions. Reinforcement was cleaned and weighed prior to embedment into the concrete slabs. Periodic non-destructive measurements of concrete performance included half cell potential monitoring, concrete resistivity and electrochemical measurements of rates of corrosion of steel in concrete using potentiodynamic anodic procedures. In addition, individual slabs were broken for reinforcement recovery at predetermined times during the study and measurements made of the area of corrosion and the weight loss of steel through corrosion. As opposed to the initiation-propagation model frequently cited in the literature, three distinct segments were apparent when the estimated corrosion current data were plotted against the concrete resistivity over a period of five years for reinforced concrete slabs considered in this study. The first stage was described as the Quiescent Stage, during which it was found that resistivity increased with time and estimated corrosion current values were low. Upon reaching a maximum resistivity value, a second stage of corrosion took place. This stage was described as the Active Stage, during which resistivity values decreased and estimated corrosion current values increased. After this, a third or Breakaway Stage of corrosion was reached, during which resistivity values decreased at a lower rate while estimated corrosion currents increased significantly. The f...
