By American Water Works Association.; American National Standards Institute
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Additional info for Cement-mortar protective lining and coating for steel water pipe-- 4 in. (100 mm) and larger-- shop applied
However, cracks up to 1/ 16 in. 6 mm) in width, or when allowed by the purchaser, up to 1/ 8 in. 2 mm) in width if cement– mortar overcoat is not considered in pipe design, do not require repair. The need for the repair of wider cracks shall be determined by the purchaser. Repair procedures shall include brushing or wiping neat cement into the cracks, autogenous healing of the cracks by additional moist cure, or a combination of these methods. 9 Curing of coating. Curing of coating shall conform to the provisions of Sec.
3. 1 Sampling and testing frequency. A set of at least two standard test cylinders, 6 in. (150 mm) in diameter by 12 in. (300 mm) in length, shall be made each day from the cement–mortar lining for each shift to satisfy the quality control requirements of Sec. 5. Additional cement–mortar testing shall be specified by the purchaser. 2 Cement–mortar test cylinders. The cement mortar shall be removed from the mix in accordance with ASTM C172, or samples may be prepared by omitting sufficient water from the production mix to obtain a 1- to 3-in.
16 AWWA C205-12 The cement mortar shall be projected at high velocity against the exterior surfaces of the pipe, or shall be applied by an equivalent method, to produce a hard coating of the specified thickness. The cement–mortar coating thickness shall be checked on each size of pipe before removing the pipe from the coating machine. 2 Mix water. Mix water shall conform to the provisions of Sec. 2. 3 Placement temperature. Placement temperature shall conform to the provisions of Sec. 3. 4 Support.