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ASTM E518-00a

(Test Method)

Standard Test Methods for Flexural Bond Strength of Masonry

Standard Test Methods for Flexural Bond Strength of Masonry

SCOPE
1.1 These test methods cover determination of the flexural bond strength of unreinforced masonry assemblages. Two procedures are provided:  
1.1.1  Test Method A -Simply supported beam with third-point loading.  
1.1.2  Test Method B -Simply supported beam with uniform loading.  
1.2 The values stated in SI units are to be regarded as the standard.
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
09-Aug-2000
ICS
91.060.10 - Walls. Partitions. Facades
Technical Committee
C15 - Masonry – Manufactured Masonry Units, Mortars and Grouts
Drafting Committee
C15.04 - Research for Masonry Units and Assemblies
Current Stage
Ref Project

Relations

Replaced By
ASTM E518-02 - Standard Test Methods for Flexural Bond Strength of Masonry
Effective Date
10-Dec-2002
Referred By
ASTM C901-18 - Standard Specification for Prefabricated Masonry Panels
Effective Date
10-Aug-2000

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ASTM E518-00a - Standard Test Methods for Flexural Bond Strength of MasonryASTM E518-00a - Standard Test Methods for Flexural Bond Strength of Masonry
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ASTM E518-00a - Standard Test Methods for Flexural Bond Strength of Masonry
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued. NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information. Contact ASTM International (www.astm.org) for the latest information.
Designation: E 518 – 00a
Standard Test Methods for
Flexural Bond Strength of Masonry
This standard is issued under the fixed designation E 518; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope * and economical means for gathering comparative research data
on the flexural bond strength developed with different types of
1.1 These test methods cover determination of the flexural
masonry units and mortar or for the purpose of checking job
bond strength of unreinforced masonry assemblages. Two
quality control (materials and workmanship).
procedures are provided:
1.1.1 Test Method A—Simply supported beam with third-
NOTE 1—These test methods are not intended for use in establishing
point loading. design stresses. For this purpose, Methods E 72 should be used.
1.1.2 Test Method B—Simply supported beam with uniform
4. Apparatus
loading.
4.1 Testing Machine, conforming to the requirements of
1.2 The values stated in SI units are to be regarded as the
standard. Practices E 4.
4.2 Test Method A—The third-point loading method is
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the illustrated in Fig. 1. The load is applied by means of a loading
apparatus similar to that described in Test Method C 78.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 4.3 Test Method B—The uniform loading method is illus-
trated in Fig. 2. The load is applied by means of an air bag
bility of regulatory limitations prior to use.
typically made of poly(vinyl chloride) 0.5 mm (0.02 in.) thick.
2. Referenced Documents
The air bag shall be of any convenient thickness and shall have
2.1 ASTM Standards: a contact area equal to that of the specimen. It shall be
C 67 Test Methods for Sampling and Testing Brick and equipped with two valves for inflating and deflating the bag.
Structural Clay Tile The air bag shall be backed by a steel channel suspended from
C 78 Test Method for Flexural Strength of Concrete (Using the cross head of the testing machine with a suitable stud
Simple Beam with Third-Point Loading) welded to the web of the channel. The channel shall be an
C 140 Test Methods for Sampling and Testing Concrete American Standard steel channel whose depth is equal to the
Masonry Units and Related Units width of the air bag. It is recommended that the air pressure in
C 270 Specification for Mortar for Unit Masonry the bag be monitored during the test as a check against the test
C 778 Specification for Standard Sand machine dial indicator.
E 4 Practices for Force Verification of Testing Machines
NOTE 2—When testing specimens constructed with a high bond-
E 72 Methods of Conducting Strength Tests of Panels for
strength mortar, or whose thickness is greater than a nominal 100 mm (4
Building Construction
in.), the applied load required to fail the specimen may be such as to
E 575 Practice for Reporting Data from Structural Tests of
rupture the seams of the air bag. In such cases Test Method A is
recommended.
Building Constructions, Elements, Connections, and As-
semblies
5. Sampling and Testing
3. Significance and Use
5.1 Masonry Units—Representative masonry units shall be
sampled and tested in accordance with the following applicable
3.1 These test methods are intended to provide simplified
methods: Test Methods C 67 for brick, or Test Methods C 140
for concrete masonry units. Minimum tests required shall be
These test methods are under the jurisdiction of ASTM Committee C15 on
compressive strength, and initial rate of absorption for brick or
Manufactured Masonry Units and are the direct responsibility of Subcommittee
absorption for concrete masonry units.
C15.04 on Research.
Current edition approved Aug. 10, 2000. Published September 2000. Originally
5.2 Mortar—One of the types of mortar in Specification
published as E 518–74. Last previous edition E 518–00.
C 270 shall be used, or the mortar shall conform to that
Annual Book of ASTM Standards, Vol 04.05.
specified for the construction. Sand sieve analysis shall be
Annual Book of ASTM Standards, Vol 04.02.
Annual Book of ASTM Standards, Vol 04.01.
performed and recorded, except when ASTM C 778 standard
Annual Book of ASTM Standards, Vol 03.01.
sand is used. If ASTM C 778 standard sand is used, the record
Annual Book of ASTM Standards, Vol 04.11.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued. NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information. Contact ASTM International (www.astm.org) for the latest information.
E 518
FIG. 1 The Third-Point Loading Method (Test Method A)
FIG. 2 The Uniform Loading Method (Test Method B)
shall identify the sand as 20–30 sand, graded sand, or a blend stored in the same atmosphere as the prisms as specified in
of indicated proportions of each sand by weight.
Section 7. The following physical properties of the mortar shall
5.2.1 Mortar for prism fabrication shall be mixed to a
be determined and recorded:
workable consistency. The compressive strength, initial flow,
5.2.2 Compressive strength (average of three cubes),
and water retention of the mortar shall be determined in
5.2.3 Initial flow (laboratory-mixed mortar only),
accordance with the requirements of Specification C 270,
5.2.4 Flow after suction (water retention) (laboratory-mixed
except that the cubes molded for the compressive strength test,
mortar only).
after moist curing in the molds for 24 h, shall be released and
NOTICE: This standard has either been superceded and replaced by a new version or discontinued. NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information. Contact ASTM International (www.astm.org) for the latest information.
E 518
6. Test Specimens shall be in a nearly true plane (Note 3).
6.2.4 Repeat steps 6.2.2 and 6.2.3 until the prisms are the
6.1 A minimum of five test specimens shall be constructed
required number of courses high. Tool or otherwise finish the
as stack-bonded prisms, at least 460 mm (18 in.) high with
3 1 joints as specified.
mortar joints 10 6 1.5 mm ( ⁄8 6 ⁄16 in.) in thickness. The
number of courses in each specimen shall be such as to permit
NOTE 3—A convenient method of assuring a true plane for one face of
locating supports and loading points midway between joints for
the prism when constructing prisms individually is to use a jig as
Test Method A tests (4, 7, 10, 13, or 16 courses, depending on illustrated in Fig. 3.
face heights of units), and to provide for a span-
...

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SCOPE
1.1 These test methods evaluate the flexural bond strength, normal to the bed joints, of masonry built of manufactured masonry units. Sampling and testing procedures are referenced, and terms are defined. Three different specimen fabrication methods are specified, each for a different purpose:  
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5.1 Stress is applied as pressure over the area of the flatjack. In the case of multi-wythe masonry, stress is estimated only in the wythe in which the flatjack is inserted. Stress in other wythes may be different.
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4.1 The test methods described in this standard are intended for use as a starting point in developing specific testing protocols for masonry elements.  
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4.2 How the test results are interpreted will depend on the intended use of the masonry element being tested.
SCOPE
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SCOPE
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