1、Designation: C1586 05 (Reapproved 2011)C1586 17Standard 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 n
2、umber in 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 proper use of Specification C270 and Test Method C780 for evaluatingmasonry mortar produce
3、d in the laboratory and at the construction site.1.2 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the
4、World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C144 Specification for Aggregate for Masonry MortarC270 Specification for Mortar for Unit MasonryC780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and R
5、einforced Unit Masonry3. Significance and Use3.1 This document is intended to provide guidance and clarification to designers, specifiers, inspectors, testing agencies,producers, and users in specifying and evaluating masonry mortar.3.2 Users of documents Specification C270 and Test Method C780 ofte
6、n confuse and sometimes inadvertently misuse parts ofthe two documents when specifying or evaluating masonry mortar. This guide seeks to address specific items within SpecificationC270 and Test Method C780 to help promote their proper use and interpretation.4. Specifying Masonry Mortar4.1 Use Specif
7、ication C270 to specify masonry mortar by either the Proportion or Property Specifications of that standard, butnot both. If neither the Proportion nor Property specification is given, or Property Specification C270 are specified, the Proportionspecification to be used. shall govern, unless data are
8、 presented to and accepted by the specifier to show that the mortar meets theproperty specification requirements.4.2 Proportion SpecificationsThese Specifications direct the mason to produce the masonry mortar using designatedvolumetric proportions of cementitious materials and aggregate as set fort
9、h in Table 1, Proportion Specifications, of SpecificationC270 for the Type of mortar specified. This procedure of specifying mortar requires no sampling and testing of mortar, and hence,no measurement of mortar properties in the laboratory or the field is required. All that is necessary is field con
10、firmation of theproper proportions of the mixes used in construction.4.3 Property SpecificationsThese Specifications require testing of laboratory-prepared mortar for compliance with therequirements of Table 2, Property Specifications, of Specification C270 for the Type of mortar specified.4.3.1 The
11、 Property Specifications require evaluation of a mortar with a consistency (flow) of 110 6 5 %. This is an arbitrarilyestablished mortar consistency that is used to approximate the water content of mortar after it is placed in a masonry assemblagewith absorbent masonry units. The amount of water req
12、uired in mortar produced at the construction site is normally greater thanthe amount used for Specification C270 Property Specifications testing.1 This guide is under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonryand is the direct responsibility of Subcommittee C12.03
13、onSpecifications for Mortars.Current edition approved Nov. 1, 2011Dec. 15, 2017. Published November 2011January 2018. Originally approved in 2004. Last previous edition approved in 20052011as C1586 05.C1586 05(2011). DOI: 10.1520/C1586-05R11.10.1520/C1586-17.2 For referencedASTM standards, visit the
14、ASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an
15、indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to
16、be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.3.2 Do not use the Specification C270 Property Specifications requirements to evaluate construction site-produced mortars.Due to the higher amount o
17、f water necessary for actual masonry construction, mortar produced and sampled in the field willtypically have lower compressive strength than that produced in the laboratory per Specification C270.4.3.3 When mortar is specified by the Property Specifications, the quantities of cementitious material
18、s and aggregates asdetermined through laboratory testing are converted to volumetric proportions to produce masonry mortar at the construction site.5. Quality Assurance of Masonry Mortar5.1 Mortar MaterialsVerify that individual mortar materials being used meet the ASTM Standards listed under the Ma
19、terialsSection of Specification C270. Compliance is typically verified by submission of a letter of certification or test report for eachmortar material.NOTE 1If any of the materials used do not comply with the material requirements of Specification C270, the Proportion Specifications can not beused
20、. Specification C270 specifically permits the use of masonry sands that do not comply with the gradation requirements of Specification C144 providedthat the Property Specifications of Specification C270 are used rather than the Proportion Specifications.5.2 Property SpecificationsVerify that the tes
21、ted properties of the laboratory-prepared mortar meet the appropriate PropertySpecifications requirements of Specification C270 for the specified mortarType.Also verify that the laboratory test report includesthe volumetric proportions and materials used to meet the Property Specifications.5.3 Propo
22、rtioning of MaterialsUse inspection, testing, or both to assure proper proportioning of mortar materials at theconstruction site.5.4 InspectionVerify by observation that the method of measuring material quantities for the mortar used in constructionaccurately maintains the required proportions. Veri
23、fy that the individual mortar materials being used are those approved for theproject.5.5 Testing:5.5.1 Use Test Method C780, not Specification C270, to evaluate mortars prepared at the construction site.5.5.2 Use Test Method C780 to evaluate masonry mortar prepared at the construction site for the f
24、ollowing properties: mortaraggregate ratio consistency (Test Method C780, Annex A4) and A1), board life (Test Method C780mortar water , Annex A3),mortar aggregate ratio (Test Method, Annex A4), and air content (Test Method C780, Annex A5). By measuring the mortaraggregate ratio and mortar water cont
25、ent, ratio, the proportion of cementitious materials to aggregate by mass can be determinedand then converted to proportions by volume. The measured volumetric proportions of the construction site-produced mortar canbe compared to the Specification C270 Proportion Specifications or the volumetric pr
26、oportions derived for the PropertySpecifications, whichever applies.5.5.3 Measurement of construction site masonry mortar compressive strength using Test Method C780,AnnexA7,A6, is not theappropriate test method to determine the compliance of the mortar with the compressive strength requirements of
27、SpecificationC270; however it may have some value in the determination of mortar uniformity. Construction site masonry mortar strengths arenot generally equal to the values cited in the Property Specifications Requirements Table of Specification C270 due to thedifference between water contents of fi
28、eld- and laboratory-produced mortars. Furthermore, mortar compressive strengths can varyfrom day to day depending on the amount of mix water required, the curing conditions at the construction site, the weatherconditions, masonry unit and sand moisture contents, and other variables.5.5.3.1 Measuring
29、 mortar compressive strength of field-sampled mortar has no relevance unless preconstruction testing isperformed in the laboratory using similar mixing equipment, mortar materials, and the same specimen geometry. Even when thisis done, the field compressive strength data can only be compared to the
30、preconstruction mortar strength data in general, due toother factors, such as weather, temperature of mortar, and the absorption properties of the specific masonry units being used.6. Preconstruction and Construction Evaluation of Mortar Properties6.1 Use Test Method C780 to evaluate mortar properti
31、es of a mortar mixed to a field consistency.6.2 Annex A1 and A3 of Test Method C780 are used to measure consistency (sometimes called plasticity or flow). Annex A6is used to measure air content. Annex A7 is used to measure compressive strength.NOTE 2The consistency of mortar at a construction site s
32、hould be adjusted to provide optimum workability that is compatible with the masonry unitsused in the construction, rather than using a predetermined value for consistency. Due to different weather conditions (temperature, humidity, and windvelocity) and masonry unit and sand moisture contents, mort
33、ar properties measured from construction site-produced specimens can be quite different fromand more variable than those measured during preconstruction evaluation testing.6.3 Properties of mortars measured by Test Method C780 are not required nor expected to meet the Property Requirements ofTable 2
34、 in Specification C270.7. Keywords7.1 aggregate ratio; compressive strength; consistency; field testing; laboratory testing; masonry; mortar; quality; specifying;water contentC1586 172ASTM International takes no position respecting the validity of any patent rights asserted in connection with any it
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37、eeting 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 copyrighted by ASTM International, 100 Barr Harbor Drive
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