1、Designation: C1586 05 (Reapproved 2011)Standard Guide forQuality Assurance of Mortars1This standard is issued under the fixed designation C1586; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
2、 parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This document provides guidance regarding the properuse of Specification C270 and Test Method C780 for evaluat-ing masonry mortar produced in th
3、e laboratory and at theconstruction site.2. Referenced Documents2.1 ASTM Standards:2C144 Specification for Aggregate for Masonry MortarC270 Specification for Mortar for Unit MasonryC780 Test Method for Preconstruction and ConstructionEvaluation of Mortars for Plain and Reinforced UnitMasonry3. Signi
4、ficance and Use3.1 This document is intended to provide guidance andclarification to designers, specifiers, inspectors, testing agen-cies, producers, and users in specifying and evaluating ma-sonry mortar.3.2 Users of documents Specification C270 and TestMethod C780 often confuse and sometimes inadv
5、ertentlymisuse parts of the two documents when specifying or evalu-ating masonry mortar. This guide seeks to address specificitems within Specification C270 and Test Method C780 to helppromote their proper use and interpretation.4. Specifying Masonry Mortar4.1 Use Specification C270 to specify mason
6、ry mortar byeither the Proportion or Property Specifications of that stan-dard, but not both. If neither the Proportion nor Propertyspecification is given, Specification C270 the Proportion speci-fication to be used.4.2 Proportion SpecificationsThese Specifications directthe mason to produce the mas
7、onry mortar using designatedvolumetric proportions of cementitious materials and aggregateas set forth in Table 1, Proportion Specifications, of Specifica-tion C270 for the Type of mortar specified. This procedure ofspecifying mortar requires no sampling and testing of mortar,and hence, no measureme
8、nt of mortar properties in the labo-ratory or the field is required. All that is necessary is fieldconfirmation of the proper proportions of the mixes used inconstruction.4.3 Property SpecificationsThese Specifications requiretesting of laboratory-prepared mortar for compliance with therequirements
9、of Table 2, Property Specifications, of Specifica-tion C270 for the Type of mortar specified.4.3.1 The Property Specifications require evaluation of amortar with a consistency (flow) of 110 6 5 %. This is anarbitrarily established mortar consistency that is used toapproximate the water content of mo
10、rtar after it is placed in amasonry assemblage with absorbent masonry units. Theamount of water required in mortar produced at the construc-tion site is normally greater than the amount used for Specifi-cation C270 Property Specifications testing.4.3.2 Do not use the Specification C270 Property Spec
11、ifi-cations requirements to evaluate construction site-producedmortars. Due to the higher amount of water necessary foractual masonry construction, mortar produced and sampled inthe field will typically have lower compressive strength thanthat produced in the laboratory per Specification C270.4.3.3
12、When mortar is specified by the Property Specifica-tions, the quantities of cementitious materials and aggregatesas determined through laboratory testing are converted tovolumetric proportions to produce masonry mortar at theconstruction site.5. Quality Assurance of Masonry Mortar5.1 Mortar Material
13、sVerify that individual mortar mate-rials being used meet the ASTM Standards listed under theMaterials Section of Specification C270. Compliance is typi-cally verified by submission of a letter of certification or testreport for each mortar material.NOTE 1If any of the materials used do not comply w
14、ith the materialrequirements of Specification C270, the Proportion Specifications can not1This guide is under the jurisdiction of ASTM Committee C12 on Mortars andGrouts for Unit Masonry and is the direct responsibility of Subcommittee C12.03 onSpecifications for Mortars.Current edition approved Nov
15、. 1, 2011. Published November 2011. Originallyapproved in 2004. Last previous edition approved in 2005 as C1586 05. DOI:10.1520/C1586-05R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volum
16、e information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.be used. Specification C270 specifically permits the use of masonry sandsthat do not comply with the grada
17、tion requirements of Specification C144provided that the Property Specifications of Specification C270 are usedrather than the Proportion Specifications.5.2 Property SpecificationsVerify that the tested proper-ties of the laboratory-prepared mortar meet the appropriateProperty Specifications require
18、ments of Specification C270for the specified mortar Type. Also verify that the laboratorytest report includes the volumetric proportions and materialsused to meet the Property Specifications.5.3 Proportioning of MaterialsUse inspection, testing, orboth to assure proper proportioning of mortar materi
19、als at theconstruction site.5.4 InspectionVerify by observation that the method ofmeasuring material quantities for the mortar used in construc-tion accurately maintains the required proportions. Verify thatthe individual mortar materials being used are those approvedfor the project.5.5 Testing:5.5.
20、1 Use Test Method C780, not Specification C270,toevaluate mortars prepared at the construction site.5.5.2 Use Test Method C780 to evaluate masonry mortarprepared at the construction site for the following properties:mortar aggregate ratio (Test Method C780, Annex A4) andmortar water content (Test Me
21、thod C780, Annex A5). Bymeasuring the mortar aggregate ratio and mortar water content,the proportion of cementitious materials to aggregate by masscan be determined and then converted to proportions byvolume. The measured volumetric proportions of the construc-tion site-produced mortar can be compar
22、ed to the SpecificationC270 Proportion Specifications or the volumetric proportionsderived for the Property Specifications, whichever applies.5.5.3 Measurement of construction site masonry mortarcompressive strength using Test Method C780, Annex A7, isnot the appropriate test method to determine the
23、 compliance ofthe mortar with the compressive strength requirements ofSpecification C270; however it may have some value in thedetermination of mortar uniformity. Construction site masonrymortar strengths are not generally equal to the values cited inthe Property Specifications Requirements Table of
24、 Specifica-tion C270 due to the difference between water contents of field-and laboratory-produced mortars. Furthermore, mortar com-pressive strengths can vary from day to day depending on theamount of mix water required, the curing conditions at theconstruction site, the weather conditions, masonry
25、 unit andsand moisture contents, and other variables.5.5.3.1 Measuring mortar compressive strength of field-sampled mortar has no relevance unless preconstruction testingis performed in the laboratory using similar mixing equipment,mortar materials, and the same specimen geometry. Even whenthis is d
26、one, the field compressive strength data can only becompared to the preconstruction mortar strength data in gen-eral, due to other factors, such as weather, temperature ofmortar, and the absorption properties of the specific masonryunits being used.6. Preconstruction and Construction Evaluation ofMo
27、rtar Properties6.1 Use Test Method C780 to evaluate mortar properties ofa mortar mixed to a field consistency.6.2 Annex A1 and A3 of Test Method C780 are used tomeasure consistency (sometimes called plasticity or flow).Annex A6 is used to measure air content. Annex A7 is used tomeasure compressive s
28、trength.NOTE 2The consistency of mortar at a construction site should beadjusted to provide optimum workability that is compatible with themasonry units used in the construction, rather than using a predeterminedvalue for consistency. Due to different weather conditions (temperature,humidity, and wi
29、nd velocity) and masonry unit and sand moisturecontents, mortar properties measured from construction site-producedspecimens can be quite different from and more variable than thosemeasured during preconstruction evaluation testing.6.3 Properties of mortars measured by Test Method C780are not requir
30、ed nor expected to meet the Property Require-ments of Table 2 in Specification C270.7. Keywords7.1 aggregate ratio; compressive strength; consistency; fieldtesting; laboratory testing; masonry; mortar; quality; specify-ing; water contentASTM International takes no position respecting the validity of
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32、revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Y
33、our comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is co
34、pyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C1586 05 (2011)2
