FR0324

Sept 1992

I BENEFITS

This work should enable a better understanding of the use of cement mortar linings for the corrosion protection of iron water mains. Investigation of the durability of cement linings will assist asset and rehabilitation planning, whereas an evaluation of water quality and effluent disposal considerations will assist users in meeting regulatory requirements.

II OBJECTIVES

The objective of this programme of work is to provide guidance on the use of cement mortar linings, with regard to their durability (lifetime), effect on water quality and their environmental impact associated with effluent disposal. The objective of this report is to update the contributors to this programme of work of current progress.

III REASONS

The reason for initiating this study was because of existing concerns regarding the effects of cement mortar linings on water quality, and perceived problems in relation to lining durability and effluent disposal.

Identification and provision of suitable sites for water quality, and in situ cement lined samples for durability studies, is required for progression in these areas of work.

Existing guidelines on the use of cement mortar linings should be followed until this programme of work has been completed. It is recommended that the effluent disposal guidelines (Appendix B) should be followed where practicable; situations not covered should be monitored and reported to WRc.

Current progress on the durability and environmental impact of cement mortar lining is reported. The requirement for field sites (to study water quality effects) and further cement lined pipe samples (to assess long term durability) is identified. Current guidelines for the disposal of effluents from the cement lining process are presented.

Copies of the Report are available from FWR, price £15.00 less 20% to FWR Members