CEMENT MORTAR AND
CONCRETE LININGS FOR PIPE
Richard E. Deremiah, P.E.
Price Brothers Company
It has been known for over 100 years that portland cement mortar and concrete
provide considerable protection to embedded ferrous materials against the corrosive
effects of soil and water. The most common embedded ferrous material receiving
this type of protection has been the steel bars in reinforced concrete. There are
literally thousands of reinforced concrete bridges, buildings, parking garages, and
other structures in service today. During the 1920s practical methods were developed
to apply portland cement mortar linings to cast-iron and steel pipe in the manufactur-
ing plant. In the 1930s a method for applying cement mortar linings to in-situ pipe
was developed. Since that time, a significant amount of steel pipe, cast-iron pipe,
and more recently, ductile iron pipe has been lined with portland cement mortar.
Portland cement mortar linings have become the most common protective measure
used for pipe in water and wastewater service. The concrete pressure pipe industry
also took advantage of the protective properties of portland cement mortar and
concrete during the development of reinforced concrete pressure pipe in the early
1900s and prestressed concrete pressure pipe in the early 1940s. Since the mid-
1940s, portland cement mortar and concrete linings for concrete pressure pipe have
proven highly successful, with almost all such pipe still remaining in active service.
Portland cement mortar and concrete linings are very economical and provide
superior corrosion protection.
Terminology and Definitions
A mixture of portland cement, fine ag-
gregate (sand), and water
GENERIC DESIGN CONSIDERATIONS
A mixture of portland cement, fine
aggregate (sand), coarse aggregate
(gravel), and water
The formation of localized corrosion
products scattered over the metal sur-
face in the form of knoblike mounds