ASTM C505M-19

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it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C505M − 15 C505M − 19
Standard Specification for
Nonreinforced Concrete Irrigation Pipe With Rubber Gasket
Joints (Metric)
This standard is issued under the fixed designation C505M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This specification covers nonreinforced concrete pipe with rubber gasket joints to be used for the conveyance of irrigation
water with working pressures, including hydraulic transients, as shown in Table 1.
1.2 This specification is the SI counterpart of Specification C505.
NOTE 1—This specification is for manufacturing and purchase only and does not include requirements for bedding, backfill, installation, or field repairs.
The owner is cautioned that he must correlate field conditions with the characteristics of the pipe specified and provide inspection during installation.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
C33/C33M Specification for Concrete Aggregates
C150/C150M Specification for Portland Cement
C260/C260M Specification for Air-Entraining Admixtures for Concrete
C494/C494M Specification for Chemical Admixtures for Concrete
C497M Test Methods for Concrete Pipe, Concrete Box Sections, Manhole Sections, or Tile (Metric)
C595/C595M Specification for Blended Hydraulic Cements
C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
C822 Terminology Relating to Concrete Pipe and Related Products
C989/C989M Specification for Slag Cement for Use in Concrete and Mortars
C1017/C1017M Specification for Chemical Admixtures for Use in Producing Flowing Concrete
C1116/C1116M Specification for Fiber-Reinforced Concrete
C1602/C1602M Specification for Mixing Water Used in the Production of Hydraulic Cement Concrete
D395 Test Methods for Rubber Property—Compression Set
D412 Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension
D471 Test Method for Rubber Property—Effect of Liquids
D573 Test Method for Rubber—Deterioration in an Air Oven
D1149 Test Methods for Rubber Deterioration—Cracking in an Ozone Controlled Environment
D1415 Test Method for Rubber Property—International Hardness
D2240 Test Method for Rubber Property—Durometer Hardness
3. Terminology
3.1 Definitions—For definitions of terms relating to concrete pipe, see Terminology C822.
This specification is under the jurisdiction of ASTM Committee C13 on Concrete Pipe and is the direct responsibility of Subcommittee C13.01 on Non-Reinforced
Concrete Sewer, Drain and Irrigation Pipe.
Current edition approved Oct. 1, 2015July 15, 2019. Published October 2015July 2019. Originally approved in 1980. Last previous edition approved in 20112015 as
C505M – 11.C505M – 15. DOI: 10.1520/C0505M-15.10.1520/C0505M-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C505M − 19
TABLE 1 Standard Dimensions, Working Pressures, and Test
Requirements
Minimum Three-
Designated Wall Required
Working Edge-Bearing
A
Internal Hydrostatic Test
Thickness,
B
Pressure, m Load, kN/linear
C
mm
Diameter, mm Pressure, kPa
metre
150 19 9 275 19.0
200 25 9 275 19.5
250 32 9 275 20.5
300 38 9 275 22.0
375 47 9 275 24.0
450 57 9 275 26.5
525 66 9 275 27.5
600 75 9 275 29.0
A
Thinner walls are not prohibited on pipe units not over 1.22 m in length but the
thickness of such walls should be not less than the internal diameter divided by 10.
B
With the exception of 525 and 600-mm pipe, higher working pressures are not
prohibited to be used up to a maximum of 15 m for 150 through 300-mm diameters
and 12 m for 375 through 450-mm diameters. In these cases the strength of the
pipe shall be increased to give minimum internal hydrostatic test pressures of at
least three times the design working pressure when tested as specified in 10.4.
C
For hydrostatic test requirements, refer to 10.4.
4. Classification
4.1 Pipe manufactured in accordance with this specification shall be known as “Standard Nonreinforced Concrete Irrigation Pipe
with Rubber Gasket Joints.”
5. Basis of Acceptance
5.1 The acceptability of the pipe, joint design, and gaskets shall be determined by the results of the tests prescribed in this
specification, if and when required, and by inspection to determine whether the pipe and gaskets conform to the specification as
to design and freedom from defects.
6. Materials and Manufacture
6.1 Concrete—The concrete shall consist of cementitious materials, mineral aggregates, admixtures, if used, and water.
6.2 Cementitious Materials:
6.2.1 Cement—Cement shall conform to the requirements for portland cement of Specification C150/C150M or shall be
portland blast-furnace slag cement, portland-limestone cement, or portland-pozzolan cement conforming to the requirements of
Specification C595/C595M, except that the pozzolan constituent in the Type IP portland-pozzolan cement shall be fly ash.
6.2.2 Fly Ash—Fly ash shall conform to the requirements of Specification C618, Class F or Class C.
6.2.3 Slag Cement—Slag cement shall conform to the requirements of Grade 100 or 120 of Specification C989/C989M.
6.2.4 Allowable Combinations of Cementitious Materials—The combination of cementitious materials used in the concrete shall
be one of the following:
6.2.4.1 Portland cement only,
6.2.4.2 Portland blast-furnace slag cement only,
6.2.4.3 Portland-pozzolan cement only,
6.2.4.4 Portland-limestone cement only,
6.2.4.5 A combination of portland cement or portland-limestone cement and fly ash,
6.2.4.6 A combination of portland cement or portland-limestone cement and slag cement,
6.2.4.7 A combination of portland cement or portland-limestone cement, fly ash and slag cement, or
6.2.4.8 A combination of portland-pozzolan cement and fly ash.
6.3 Aggregates—Aggregates shall conform to the requirements of Specification C33/C33M, except that the requirements for
gradation shall not apply.
6.4 Admixtures—The following admixtures and blends are allowable:
6.4.1 Air-entraining admixture conforming to Specification C260/C260M;
6.4.2 Chemical admixture conforming to Specification C494/C494M;
6.4.3 Chemical admixture for use in producing flowing concrete conforming to Specification C1017/C1017M; and
6.4.4 Chemical admixture or blend approved by the owner.
6.5 Gaskets:
6.5.1 Composition—The rubber compound used in the manufacture of the gasket shall be compounded from natural rubber,
synthetic rubber, or a mixture of the two fabricated as prescribed in 6.5.2 to 6.5.6, inclusive.
C505M − 19
6.5.2 Fabrication—Gaskets shall be extruded or molded and cured in such a manner that they will be dense and homogeneous
at any cross section, and have uniform dimensions. They shall be free from porosity, blisters, pitting, and other defects, which will
affect their serviceability.
6.5.3 Tolerances—Commercial tolerances A3-F3, T.032 for molded gaskets, and A3-F3 for extruded gaskets in accordance with
the Rubber Handbook shall be permitted. The tolerances in gasket and joint dimensions shall be such as not to exceed permissible
deformations prescribed in Section 8.
6.5.4 Physical Properties of Gaskets—The rubber from which the gaskets are fabricated shall have the following physical
properties:
Ultimate elongation at break, min, % 350
Ultimate elongation at break after 80
aging, min, % of
elongation before aging
Hardness, International Rubber 40 to 60
Hardness Degrees
A
or Durometer
Compression set, max, % 25
Water absorption, % 10
Ozone resistance no cracks in accordance
with Method D1149
A
Allowable variation ±5 from manufacturer’s specified hardness.
6.5.4.1 Testing shall be in accordance with Section 9.
6.5.5 Strength of Splice—If a splice is used in the manufacture of the gasket, the strength shall be such that the gasket shall
withstand 100 % elongation over the part of the gasket that includes the splice with no visible separation of the splice. While in
the stretched position, the gasket shall be rotated in the spliced area a minimum of 180° in each direction in order to inspect for
separation. Any portion of the splice shall be capable of passing a bend test without visible separation. The bend test for circular
gaskets is defined as wrapping the portion of the unstretched gasket containing the splice a minimum of 180° and a maximum of
270° around a rod of a diameter equal to the cross section diameter of the gasket.
6.5.6 Storage—The gaskets shall be stored in a cool, clean, and shaded place, preferably at 21°C or less and in no case shall
the gaskets be exposed to the direct rays of the sun for more than 72 hours.
6.6 Fibers—Synthetic fibers and nonsynthetic fibers shall be allowed to be used, at the manufacturer’s option, in concrete pipe
as a nonstructural manufacturing material. Synthetic fibers (Type II and Type III) and nonsynthetic fiber (Type I) designed and
manufactured specifically for use in concrete and conforming to the requirements of Specification C1116/C1116M shall be
accepted.
6.7 Water—Water used in the production of concrete shall be potable or nonpotable water that meets the requirements of
Specification C1602/C1602M.
7. Design
7.1 Design Tables—The standard dimensions shall be as given in Table 1. Wall thicknesses furnished shall be not less than those
given in Table 1, except as affected by the tolerance specified in Section 12.
7.2 Modified Design—Manufacturers shall submit to the owner for approval prior to manufacture, wall thicknesses other than
those shown in Table 1. Such pipe shall meet all of the test and performance requirements specified by the owner in accordance
with 5.1.
8. Joints
8.1 Pipe units shall be manufactured with male- and female-type joints of such design that the rubber gasket applied thereto shall
be the sole element depended upon to make the joints flexible and watertight.
8.2 The slope on the conic surfaces of the gasket seat on the inside of the female portion and on the outside of the male portion
shall be not more than 3.5° measured from a longitudinal trace on the inside surface of the pipe. The female or the male portions,
or both, shall form a proper gasket positioning area or “seat.” The joint design shall be such that, when the joint has been fully
closed and is off center sufficiently to cause the outer concrete surface of the male portion and the inner concrete surface of the
female portion to come into contact at some place in the joint periphery, the deformation of the gasket adjacent to that point shall
not exceed 50 % of the stretched diameter for O-ring gaskets, or 75 % of the uncompressed radial thickness for all other types.
At the diametrically opposite side, the gasket deformation shall be not less than 15 % of the stretched diameter for O-ring gaskets,
or 25 % of the uncompressed radial thickness for all other types. O-ring gaskets are defined as solid gaskets of circular cross
section. Stretched gasket diameters shall be calculated as being =1/ 11x times the original gasket diameter where x equals the
~ !
percent of gasket stretch divided by 100.
Available from the Rubber Manufacturers Assn., Inc., 1400 K St., NW, suite 900, Washington DC, 20005.
C505M − 19
8.3 The joint design shall provide for the deflection of each pipe unit by opening one side of the outside perimeter of the joint,
wider than the fully closed position, a distance no less than 13 mm or 25 % of the wall thickness, whichever is less, without
reducing its watertightness.
8.4 The joint shall be of such design that it will withstand, without cracking or fracturing, the forces caused by the compression
of the gasket, and the required hydrostatic test pressure.
8.5 All surfaces of the joint upon or against which the gasket bear shall be smooth, free of spall, cracks, or fractures, and
imperfections that would adversely affect performance.
8.6 Alternative Joint Designs—If permitted by the owner, manufacturers shal
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