2.1.2.2
Clay Piping Jointing Materials
ASTM C 425.
2.1.3
Concrete Gravity Sewer Piping
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NOTE: Not allowed for LANTNAVFACENGCOM projects.
Not normally allowed on NASA projects
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2.1.3.1
Concrete Gravity Pipe and Fittings
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NOTE: The D-load (load per linear [meter] [foot] of
diameter) must be calculated on the basis of project
conditions to determine the applicable Class or
strength of pipe. The Concrete Pipe Design Manual
(1980 edition) of the American Concrete Pipe
Association contains design information and methods
by which the applicable Class or strength of pipe
can be determined when depth of trench is known.
It may be necessary to modify chemical requirements
for cement under certain conditions. Sulfate
resistance is required for concrete pipe when pipe
is carrying sulfate-bearing waters, or when pipe is
buried in soil containing sulfates. Specify Type II
(moderate sulfate resisting) cement when
water-soluble sulfates (as S04) in the soil are in
the range of 0.1 to 0.2 percent and, for water, are
in the range of 150 to 1000 parts per million.
Specify Type V (sulfate resisting) cement when soils
contain in excess of 0.2 percent water-soluble
sulfate and water samples contain in excess of 1000
parts per million. In areas where reactive
aggregates are known to occur, specify low alkali
cement.
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Pipe shall be [nonreinforced concrete pipe conforming to ASTM C 14M ASTM C
14, Class [_____]] [reinforced concrete pipe conforming to ASTM C 76M ASTM
C 76, Class [_____]]. Circular pipe with elliptical reinforcement shall
have a readily visible line at least 300 mm 12 inches long painted or
otherwise applied on the inside and outside of the pipe at each end so that
when the pipe is laid in the proper position, the line will be at the
center of the top of the pipe. Fittings and specials shall conform to the
applicable requirements specified for the pipe and shall be of the same
strength as the pipe. [Cement used in manufacturing pipe and fittings
shall be [Type II] [Type V] [low alkali cement] conforming to ASTM C 150.]
2.1.3.2
Jointing Materials for Concrete Gravity Piping
Gaskets and pipe ends for rubber gasket joint shall conform to ASTM C 443M
ASTM C 443. Gaskets shall be suitable for use with sewage.
2.1.4
Concrete Pressure Piping
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SECTION 02531
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