ASTM C482-02

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Designation:C482–02
Standard Test Method for
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Bond Strength of Ceramic Tile to Portland Cement Paste
This standard is issued under the fixed designation C 482; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.3 Because the laboratory method of applying shear stress
rapidly loads both tile and setting bed in compression, a
1.1 This test method covers the determination of the ability
stronger than normal setting bed for the test specimens is
ofglazedceramicwalltile,ceramicmosaictile,quarrytile,and
specified. This avoids failure of the setting bed before the
pavers to be bonded to portland cement paste.This test method
desired failure at the tile-bond coat interface occurs. In real tile
includes both face-mounted and back-mounted tile.
installations with portland cement paste an entirely different
1.2 The values stated in inch-pound units are to be regarded
loading mechanism, usually generated primarily by shrinking
as the standard. The values given in parentheses are for
of the setting bed or structural backing, results in mild tension
information only.
in setting bed and mild compression in the tile, but the same
1.3 This standard does not purport to address all of the
type of shear stress occurs between tile and bond coat as does
safety concerns, if any, associated with its use. It is the
in response to the laboratory loading method.The finding of an
responsibility of the user of this standard to establish appro-
adequate bond strength under the conditions of this test method
priate safety and health practices and determine the applica-
can be taken as proof that the tested tile could be permanently
bility of regulatory limitations prior to use.
bonded in a properly installed conventional installation using
2. Referenced Documents
the lean, low-shrinkage mortars customarily specified for this
particular purpose.
2.1 ASTM Standards:
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4.4 To maintain practical sample size and limit maximum
C 150 Specification for Portland Cement
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breaking load, tile larger than nominal 4 ⁄4 in. (108 mm) on a
C 185 Test Method for Air Content of Hydraulic Cement
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side must be cut to 4 in. (102 mm).
Mortar
C 207 Specification for Hydrated Lime for Masonry Pur-
5. Significance and Use
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poses
5.1 This test method provides a means of determining
C 242 Terminology of Ceramic Whitewares and Related
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whether or not tile of the types indicated in 1.1 can be bonded
Products
with adequate strength to portland cement paste. Tile specifi-
3. Terminology
cations can refer to this test method in order to establish
minimum bond strength limits appropriate to the service
3.1 Definitions:
conditions that are anticipated.
3.1.1 For definitions of the types of tile listed in 1.1, refer to
5.2 Separation between bond coat and setting bed, or
Terminology C 242.
breakage of the setting bed itself shall not be considered
4. Summary of Test Method
failures of tile bond.
4.1 This test method consists of bonding tile under con-
6. Apparatus
trolled conditions to a pure portland cement paste bond coat,
6.1 Molds—Five frame-type molds having inside dimen-
supported by a cement mortar bed.
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sions 6 by 4 ⁄2 by 2 in. (152 by 114 by 51 mm) in depth. The
4.2 After proper cure of the test assembly, a load is applied
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molds shall be made of ⁄8-in. (9.5-mm) thick rigid material
to one edge of the tile and the load increased at a definite rate
such as brass, and the inside faces of the molds shall present a
until the bond between tile and bond coat is broken.
smooth surface. They shall be constructed in such a manner
that they can be taken apart without damage to the molded
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ThistestmethodisunderthejurisdictionofASTMCommitteeC21onCeramic
cement block. Diagrams of suitable molds are shown in Fig. 1.
Whitewares and Related Products and is the direct responsibility of Subcommittee
6.2 Compression Testing Machine—The testing machine
C21.06 on Ceramic Tile.
Current edition approved May 10, 2002. Published August 2002. Originally
may be either a hydraulic or screw type, with an accuracy of
published as C 482 – 61 T. Last previous edition C 482– 81 (1996).
61.0 %. It shall be capable of applying a uniformly distributed
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Annual Book of ASTM Standards, Vol 04.01.
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shearing load at a rate of 200 6 20 psi/min (1.4 6 0.1
Annual Book of ASTM Standards, Vol 15.02.
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C482–02
Metric Equivalents
Letter in. mm
3
A ⁄16 4.8
3
B ⁄8 9.5
C 6 152
3
D6 ⁄4 171
1
E4 ⁄2 114
1
F5 ⁄4 133
1
G1 ⁄4 32
H2
...