ASTM C1006-84(2001)

Standard Test Method for Splitting Tensile Strength of Masonry Units

SCOPE
1.1 This test method covers the determination of the splitting tensile strength of masonry units.  
1.2 This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-2000
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: C15 - Masonry – Manufactured Masonry Units, Mortars and Grouts
• Drafting Committee: C15.04 - Research for Masonry Units and Assemblies

Relations

• Replaces: ASTM C1006-84(1996)e1 - Standard Test Method for Splitting Tensile Strength of Masonry Units
• Effective Date: 01-Jan-2001
• Replaced By: ASTM C1006-07 - Standard Test Method for Splitting Tensile Strength of Masonry Units
• Effective Date: 01-Oct-2007
• Referred By: ASTM C1660-10(2018) - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry
• Effective Date: 01-Jan-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C 1006–84 (Reapproved 2001)
Standard Test Method for
Splitting Tensile Strength of Masonry Units
This standard is issued under the fixed designation C 1006; 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 greater than the length of the intended test area, and of
straightness within 0.5 % of the specimen length shall be
1.1 This test method covers the determination of the split-
provided for each unit. Bearing rods that meet the straightness
ting tensile strength of masonry units.
requirement can be reused.
1.2 This standard does not purport to address all of the
4.2 Supplemental Bearing Bar or Plate—If the diameter or
safety concerns, if any, associated with its use. It is the
largest dimension of the upper bearing face or lower bearing
responsibility of the user of this standard to establish appro-
block is less than the length of the specimen to be tested, a
priate safety and health practices and determine the applica-
supplementary bearing bar or plate shall be used. The contact
bility of regulatory limitations prior to use.
surfaces of the bar or plate shall be machined to within 0.05 %
2. Referenced Documents of planeness as measured on any line of contact of the bearing
area. The bearing bar or plate shall have a width of at least 2
2.1 ASTM Standards:
in. (50.8 mm), and a thickness not less than the distance from
E4 Practices for Force Verification of Testing Machines
theedgeofthesphericalorrectangularbearingblocktotheend
3. Significance and Use
of the specimen. The bar or plate shall be used in such a
manner that the load will be uniformly applied over the entire
3.1 Masonry units alone and within assemblages commonly
intended split length of the specimen.
fail in a tensile mode when loaded in compression to failure.
4.3 Testing Machine:
These tensile stresses result from differences in modulus of
4.3.1 The testing machine shall conform to the requirements
elasticity and Poisson’s ratio between the masonry unit and
of PracticesE4, and may be of any type of sufficient capacity
mortar. Additionally, the dissimilarity in behavior of the grout
that will provide the rate of loading prescribed in 6.3.
within cores of masonry units under load leads to tensile
4.3.2 The upper, hardened metal bearing face shall be
stresses in the units and results in a splitting failure.
spherically seated and attached at the center of the upper head
3.2 This test method produces a line load along the bed
of the machine. The center of the sphere shall lie at the center
surface of the masonry unit. The compressive load applied to
of the surface of the plate in contact with the specimen. The
the unit, imposed by means of bearing rods, results in a tensile
bearing plate shall be closely held in its spherical seat but shall
stress distributed over the height of the unit for the split length
be free to turn in any direction; its perimeter at the ball face
of the unit. This test method can be applied in either the
shall have at least ⁄4 in. (6.4 mm) clearance from the head of
longitudinal (parallel to the face) or the transverse direction.
the machine to allow for specimens whose test surfaces are not
The splitting tensile strength is calculated by the equation
exactly parallel. The diameter of the bearing surface shall be at
given in 7.1.
least 5 in. (127 mm). The bearing block surfaces that will
3.3 The test value provides an indicator of masonry-unit
contact the bearing bar or plate shall not depart from plane
splitting tensile strength. Additionally, the presence of defects
surfaces by more than 0.05 %.
such as visible voids or impurities in masonry units may be
revealed.
5. Sampling
4. Apparatus
5.1 Selection—For the purpose of this test, full-size ma-
sonry units shall be selected at random by the purchaser or by
4.1 Bearing Rods—Matched, paired steel bearing rods with
1 1
his authorized representative.The specimens shall be represen-
diameters within ⁄8 to ⁄12 of the specimen height, of a length
tativeofthewholelotofunitsfromwhichtheyareselectedand
shall include units representative of the complete range of
This test method is under the jurisdiction of ASTM Committee C15 on
colors and sizes in the shipment.
Manufactured Masonry Units and is the direct responsibility of Subcommittee
C15.04 on Research.
Current edition approved Jan. 5, 1984. Published February 1984.
Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C 1006–84 (2001)
mm) in height. The user of any modification should provide comparative
data, testing both ways, to validate the alternative method.
6.2 Test Alignment—Align the rods with the centerline of
the plates, and center the rods in the transverse direction.
Support the specimen on compressible rods or tubes that are
⁄16 in. (1.8 mm) smaller in diameter than the bearing rods.
Remove the compressible rods when the specimen is held in
vertical orientation by the testing-machine platens.
6.3 Rate of Loading—Apply the load without impact and
load continuously at a rate
...