ASTM C1896-20

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.
Designation:C1896 −20
Standard Specification for
Joints for Concrete Arch Pipe Using Profile Rubber
Gaskets
This standard is issued under the fixed designation C1896; 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 4. Basis of Acceptance
1.1 Thisspecificationcoversflexiblejointsforconcretearch 4.1 The acceptability of the pipe joints and gaskets shall be
pipe, using rubber gaskets for leak resistant joints. The speci- determined by the results of the physical test prescribed in this
fication covers the design of joints and the requirements for specification, if and when required, and by inspection to
rubber gaskets to be used therewith, for arch pipe conforming determine whether the pipe joints and gaskets conform to this
inallotherrespectstoSpecificationC506providedthatifthere specification as to design and freedom from defects.
is conflict in permissible variations in dimensions the require-
5. Materials and Manufacture for Gaskets
ments of this specification for joints shall govern.
5.1 The gasket shall be fabricated from a rubber compound.
1.2 The values stated in inch-pound units are to be regarded
The basic polymer shall be natural rubber, synthetic rubber, or
as standard. The values given in parentheses are mathematical
ablendofbothmeetingthephysicalrequirementsprescribedin
conversions to SI units that are provided for information only
Specification C1619.
and are not considered standard.
5.1.1 Gaskets for standard use shall meet Class C require-
1.3 This international standard was developed in accor-
ments. Gaskets which require oil resistant properties shall meet
dance with internationally recognized principles on standard-
Class D requirements.
ization established in the Decision on Principles for the
5.2 Profile Cross-Section Gaskets:
Development of International Standards, Guides and Recom-
5.2.1 Profile cross-section gaskets shall be extruded or
mendations issued by the World Trade Organization Technical
molded to the design size within a tolerance of 6 ⁄64 in.
Barriers to Trade (TBT) Committee.
(60.4 mm) or 63.0 % on any dimension, measured at any
2. Referenced Documents
cross section, whichever is larger.
5.2.2 Profile cross-section gaskets shall have the nominal
2.1 ASTM Standards:
design cut length tolerance of 63 % for extruded and spliced
C497 Test Methods for Concrete Pipe, Concrete Box
gaskets.
Sections, Manhole Sections, or Tile
C822 Terminology Relating to Concrete Pipe and Related
6. Design of Joints
Products
6.1 The manufacturer shall furnish the owner with the
C506 Specification for Reinforced Concrete Arch Culvert,
detailed design of the joint or joints including design and
Storm Drain, and Sewer Pipe
durometer hardness of the rubber gasket proposed to be
C1619 Specification for Elastomeric Seals for Joining Con-
furnished under this specification.
crete Structures
6.1.1 The joint design shall consist of a bell or groove on
3. Terminology
oneendofaunitofpipe,andaspigotortongueontheadjacent
end of the joining pipe.
3.1 Definitions—Fordefinitionsoftermsrelatingtoconcrete
6.1.2 All surfaces of the joint upon or against which the
pipe, see Terminology C822.
gasket is capable of bearing shall be smooth, free of spalls,
cracks or fractures, and imperfections that would adversely
This test method is under the jurisdiction of ASTM Committee C13 on
affect the performance of the joint.
Concrete Pipe and is the direct responsibility of Subcommittee C13.08 on Joints for
6.1.3 The joints of the pipe shall be of such design that they
Precast Concrete Structures.
will withstand the forces caused by the compression of the
Current edition approved Sept. 15, 2020. Published September 2020. DOI:
10.1520/C1896-20.
gasket when joined, without cracking or fracturing when tested
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
in accordance with Section 9.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1.4 The angle of taper on the surfaces of the inside of the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. bell or groove and the outer surface of the spigot or tongue
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1896−20
where the gasket seats shall be not more than 3.5° measured 8.1.1 Profile Cross-Section Gasket Stretch Height—
fromthepipeaxis,exceptthattapersupto5°arenotprohibited Determine the stretch height of gasket sections in accordance
if proven adequate by plant tests as specified in Section 9 and to Test Method C497.
approved by the owner. The surface on the spigot or tongue 8.1.2 Gasket Length—Determine the stretch length of gas-
shall be modified to properly position and seat the gasket. ket sections in accordance to Test Method C497.
6.1.5 The space between the gasket-bearing surfaces of the
9. Performance Requirements for Joints
assembled and centered joint shall be not more than 75 % of
the uncompressed thickness of the installed gasket with all
9.1 Whenrequiredbytheowner,assembledjointsshallpass
manufacturing tolerances applied. Minimum tolerances shall
the following in plant performance test.
not be less than 10 % of the installed gasket height. The
9.1.1 Pipe in StraightAlignment—Hydrostaticpressuretests
minimum off-center gasket deformation of the assembled joint
on joints shall be made on an assembly of two sections of pipe,
at design closure shall not be less than 15 %. The joint design properly connected in accordance with the joint design. Suit-
shall provide for the deflection of a pipe unit by opening one
able means shall be provided that allows pressure to be applied
side of the outside joint surface of the joint ⁄2 in. (13 mm) to the joint, either external or internal of the two joined pipe
wider than the designed position without causing the deforma-
sections. No fillings or packings shall be placed prior to the
tion of the gasket to be less than 10 %. Where greater
tests.After the pipe sections are fitted together with the gasket
de
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