ASTM C780-06
(Test Method)Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
SCOPE
1.1 This test method covers procedures for the sampling and testing of mortars for composition and for their plastic and hardened properties, either before or during their actual use in construction.
1.2 Preconstruction EvaluationThis test method permits comparisons of mortars made from different materials under simulated field conditions. It is also used to establish baseline values for comparative evaluation of field mortars.
1.3 Construction EvaluationUse of this method in the field provides a means for quality assurance of field-mixed mortar. It includes methods for verifying the mortar mix proportions, comparing test results for field mortars to preconstruction testing, and determining batch-to-batch uniformity of the mortar.
1.4 The test results obtained under this test method are not required to meet the minimum compressive values in accordance with the property specifications in Specification C 270.
1.5 This standard does not purport to address all of the safety concerns, 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. For specific hazards statements, see Section 8.
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Designation:C780–06
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* 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 Thistestmethodcoversproceduresforthesamplingand
responsibility of the user of this standard to establish appro-
testing of mortars for composition and for their plastic and
priate safety and health practices and determine the applica-
hardened properties, either before or during their actual use in
bilityofregulatorylimitationspriortouse.Forspecifichazards
construction.
statements, see Section 8.
NOTE 1—The testing agency performing this test method should be
evaluated in accordance with Practice C1093.
2. Referenced Documents
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1.2 Preconstruction Evaluation—This test method permits
2.1 ASTM Standards:
comparisons of mortars made from different materials under
C39/C39M Test Method for Compressive Strength of Cy-
simulated field conditions. It is also used to establish baseline
lindrical Concrete Specimens
values for comparative evaluation of field mortars.
C109/C109M 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
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-
Gravity), and Absorption of Fine Aggregate
struction testing, and determining batch-to-batch uniformity of
C173/C173M Test Method for Air Content of Freshly
the mortar.
Mixed 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-
Cement
dance with the property specifications in Specification C270.
C231 Test Method for Air Content of Freshly Mixed
Concrete by the Pressure Method
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ThistestmethodisunderthejurisdictionofASTMCommitteeC12onMortars
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for Unit Masonry and is the direct responsibility of Subcommittee C12.02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Research and Methods of Test. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Feb. 15, 2006. Published March 2006. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1974. Last previous edition approved in 2005 as C780–05. the ASTM website.
*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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C780–06
C270 Specification for Mortar for Unit Masonry the laboratory using mechanical batch mixers. These trial
C470/C470M Specification for Molds for Forming Con- batches are sampled and used in establishing the plastic and
crete Test Cylinders Vertically hardened properties of the mixtures. Because all the trial
C496/C496M Test Method for Splitting Tensile Strength mixturesareprebatchedbyweight,additionalcharacteristicsof
of Cylindrical Concrete Specimens themo
...
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