Measurements were made of the movement of a ring-tension biological filter wall at the Olifantsvlei Sewage Purification works over a period of five years. The movements were progressive, although the magnitude of the movements indicated that the steel reinforcement had not yielded. Total movement was greater than would be expected from the temperature range experienced and the appropriate thermal coefficient for the crushed Reef quartzite aggregate concrete used in the construction.
The problems encountered in and the innovative solutions applied to the structural analysis, rehabilitation and corrosion protection of the C H Mitchell bridge over the mouth of the Mtamvuna river near Port Edward.
Water hammer tests were conducted on a 13 mile long pipeline. Computed pressure variations agreed well with those recorded at the ends and at the mid-point of the pipeline. Further tests were conducted on a pipeline with a booster pump. Equations were developed which predicted the effect of the inertia of the impeller and motor.