ASTM C1586-2005 Standard Guide for Quality Assurance of Mortars《灰浆质量保证的标准指南》.pdf

1、Designation: C 1586 05Standard Guide forQuality Assurance of Mortars1This standard is issued under the fixed designation C 1586; 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 parentheses ind

2、icates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This document provides guidance regarding the properuse of Specification C 270 and Test Method C 780 for evalu-ating masonry mortar produced in the laboratory

3、 and at theconstruction site.2. Referenced Documents2.1 ASTM Standards:2C 144 Specification for Aggregate for Masonry MortarC 270 Specification for Mortar for Unit MasonryC 780 Test Method for Preconstruction and ConstructionEvaluation of Mortars for Plain and Reinforced UnitMasonry3. Significance a

4、nd 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 C 270 and TestMethod C 780 often confuse and sometimes inadvertentl

5、ymisuse parts of the two documents when specifying or evalu-ating masonry mortar. This guide seeks to address specificitems within Specification C 270 and Test Method C 780 tohelp promote their proper use and interpretation.4. Specifying Masonry Mortar4.1 Use Specification C 270 to specify masonry m

6、ortar byeither the Proportion or Property Specifications of that stan-dard, but not both. If neither the Proportion nor Propertyspecification is given, Specification C 270 the Proportionspecification to be used.4.2 Proportion SpecificationsThese Specifications directthe mason to produce the masonry

7、mortar using designatedvolumetric proportions of cementitious materials and aggregateas set forth in Table 1, Proportion Specifications, of Specifica-tion C 270 for the Type of mortar specified. This procedure ofspecifying mortar requires no sampling and testing of mortar,and hence, no measurement o

8、f 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 of T

9、able 2, Property Specifications, of Specifica-tion C 270 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 morta

10、r 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 C 270 Property Specifications testing.4.3.2 Do not use the Specification C 270 Property Speci

11、fi-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 C 270.4.3.3

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 C 270. 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

14、with the materialrequirements of Specification C 270, the Proportion Specifications can notbe used. Specification C 270 specifically permits the use of masonry sandsthat do not comply with the gradation requirements of Specification C 1441This guide is under the jurisdiction of ASTM Committee C12 on

15、 Mortars andGrouts for Unit Masonry and is the direct responsibility of Subcommittee C12.03 onSpecifications for Mortars.Current edition approved Feb. 1, 2005. Published April 2005. Originallyapproved in 2004. Last previous edition approved in 2004 as C 1586 04.2For referenced ASTM standards, visit

16、the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 10

17、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.provided that the Property Specifications of Specification C 270 are usedrather than the Proportion Specifications.5.2 Property SpecificationsVerify that the tested proper-ties of the laboratory-prepared mortar meet th

18、e appropriateProperty Specifications requirements of Specification C 270for 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

19、 assure proper proportioning of mortar materials 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 t

20、hose approvedfor the project.5.5 Testing:5.5.1 Use Test Method C 780, not Specification C 270,toevaluate mortars prepared at the construction site.5.5.2 Use Test Method C 780 to evaluate masonry mortarprepared at the construction site for the following properties:mortar aggregate ratio (Test Method

21、C 780, Annex A4) andmortar water content (Test Method C 780, 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 th

22、e construc-tion site-produced mortar can be compared to the SpecificationC 270 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 C 780, Annex A7

23、, isnot the appropriate test method to determine the compliance ofthe mortar with the compressive strength requirements ofSpecification C 270; however it may have some value in thedetermination of mortar uniformity. Construction site masonrymortar strengths are not generally equal to the values cite

24、d inthe Property Specifications Requirements Table of Specifica-tion C 270 due to the difference between water contents offield- and laboratory-produced mortars. Furthermore, mortarcompressive strengths can vary from day to day depending onthe amount of mix water required, the curing conditions at t

25、heconstruction site, the weather conditions, masonry 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

26、, and the same specimen geometry. Even whenthis is done, 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

27、.6. Preconstruction and Construction Evaluation ofMortar Properties6.1 Use Test Method C 780 to evaluate mortar properties ofa mortar mixed to a field consistency.6.2 Annex A1 and A3 of Test Method C 780 are used tomeasure consistency (sometimes called plasticity or flow).Annex A6 is used to measure

28、 air content. Annex A7 is used tomeasure compressive strength.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 diff

29、erent weather conditions (temperature,humidity, and wind 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

30、 of mortars measured by Test Method C 780are not required nor expected to meet the Property Require-ments of Table 2 in Specification C 270.7. Keywords7.1 aggregate ratio; compressive strength; consistency; fieldtesting; laboratory testing; masonry; mortar; quality; specify-ing; water contentSUMMARY

31、 OF CHANGESCommittee C12 has identified the location of selected changes to this standard since the last issue(C 1586 04) that may impact the use of this standard.(1) Section 4.2 was revised to clarify what is necessary for fieldconfirmation.C1586052ASTM International takes no position respecting th

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34、adquarters. Your 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 s

35、tandard is copyrighted 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).C1586053