ASTM C780-02

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C780–02
Standard Test Method for
Preconstruction and Construction Evaluation of Mortars for
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Plain and Reinforced Unit Masonry
This standard is issued under the fixed designation C780; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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.
INTRODUCTION
This test method provides a standard procedure for sampling and testing mortars for composition
and plastic and hardened properties, either before or during actual construction. The procedures
outlined in the Annexes are considered applicable for evaluating various combinations of portland
cement, lime, and masonry cement for mortars common to plain and reinforced unit masonry
construction.
The test procedures describe methods for the measurement of mortar composition and mortar
properties. No attempt is made to claim or substantiate specific correlations between the measured
properties and mortar performance in the masonry. However, data from these test methods can be
combined with other information to formulate judgments about the quality of the masonry.
Testing using these procedures is limited to the preconstruction evaluation of masonry mortars
withinthelaboratory,totheevaluationofmasonrymortarsattheconstructionsite,andinestablishing
the degree of quality control exercised during mortar production at the construction site.
1. Scope* responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
1.1 Thistestmethodcoversproceduresforthesamplingand
bilityofregulatorylimitationspriortouse.Forspecifichazards
testing of mortars for composition and for their plastic and
statements, see Section 8.
hardened properties, either before or during their actual use in
construction.
2. Referenced Documents
1.2 Preconstruction Evaluation—This test method permits
2.1 ASTM Standards:
comparisons of mortars made from different materials under
C39 Test Method for Compressive Strength of Cylindrical
simulated field conditions. It is also used to establish baseline
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Concrete Specimens
values for comparative evaluation of field mortars.
C109/C 109M Test Method for Compressive Strength of
1.3 Construction Evaluation—Use of this method in the
Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube
field provides a means for quality assurance of field-mixed
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Specimens)
mortar. It includes methods for verifying the mortar mix
C128 Test Method for Density, Relative Density (Specific
proportions, comparing test results for field mortars to precon-
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Gravity) and Absorption of Fine Aggregate
struction testing, and determining batch-to-batch uniformity of
C173 Test Method for Air Content of Freshly Mixed
the mortar.
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Concrete by the Volumetric Method
1.4 The test results obtained under this test method are not
C187 Test Method for Normal Consistency of Hydraulic
required to meet the minimum compressive values in accor-
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Cement
dance with the property specifications in Specification C270.
C231 Test Method for Air Content of Freshly Mixed
1.5 This standard does not purport to address all of the
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Concrete by the Pressure Method
safety concerns, if any, associated with its use. It is the
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C270 Specification for Mortar for Unit Masonry
C470 Specification for Molds for Forming Concrete Test
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ThistestmethodisunderthejurisdictionofASTMCommitteeC12onMortars
for Unit Masonry and is the direct responsibility of Subcommittee C12.02 on
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Research and Methods of Test. Annual Book of ASTM Standards, Vol 04.02.
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Current edition approved June 10, 2002. Published July 2002. Originally Annual Book of ASTM Standards, Vol 04.01.
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published as C780–74. Last previous edition C780–00. Annual Book of ASTM Standards, Vol 04.05.
*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.
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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.
C780–02
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Cylinders Vertically batches are sampled and used in establishing the plastic and
C496 Test Method for Splitting Tensile Strength of Cylin- hardened properties of the mixtures. Because all the trial
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drical Concrete Specimens
mixturesareprebatchedbyweight,additionalcharacteristicsof
C511 Specification for Moist Cabinets, Moist Rooms, and
themortarsmaybecalculatedandusedinananalysisofmortar
Water Storage Tanks Used in the Testing
...