METHODS FOR EVALUATION OF SEWER PIPES MATERIAL DETERIORATION

Most of sewer pipelines are concrete that has been either cast in place of precast. Sulphide corrosion occurs above the sewage surface while low pH sewage will cause corrosion below waterline. It can be very difficult to distinguish between purely chemical and biogenic concrete deterioration as both processes may depend on acid attack. It is very important to review and define appropriate test methods to asses performance of cement - based materials in environments of sewer system and which can be used to characterize and rate relative performance, as well as to inform long term prediction. The paper is aimed at the presentation of the selected methods used for testing the concrete composites for the resistance against sulphate attack.

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