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Synopsis The paper describes an investigation into the permeability of cement paste and concrete to crude oil. The permeability was studied by using a specially constructed permeameter. Ordinary and sulphate-resisting Portland cements were used. The concrete mixes covered a wide range of workabilities (slumps), four aggregate grading zones and a wide range of cement contents –between 225 and 625 kg/m3. The measured co-eficients of permeability were related to various mix design parameters, concrete porosity, compressive strength and applied-fluid pressure. The best prediction of permeability came from the calculated total porosity.

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Synopsis This paper describes an investigation into the shrinkage of concrete in direct contact with crude oil. The shrinkage or volume change was studied by using 100 × 100 × 500 mm concrete prisms. Ordinary Portland cement, natural river aggregates, four water/cement ratios, and four curing regimes were used. Similar specimens were cast and continuously kept in water and in a constant temperature and humidity room for comparative purposes.