Performance of the Cement-Based Mortars for Repairing the Internal Lining of Steel Pipes for Drinking Water Supplying

摘要

The common pathology oftenly observed in the water-supplying steel pipes is cracking and delaminating the cement based internal lining [1].Thus,the quick in-situ repair of these defects is essential for preventing the possible steel corrosion in pipes [2-4].The implemented repair mortar must meet the sanitary norms regarding the chemical composition of the materials allowed to be in contact with drinking water [5].The criteria of the physical and mechanical properties of fresh and hardened lining mortar have been set based on the relevant international and national specifications.