1、Designation: C144 11C144 17 American Association State Highway and Transportation Officials StandardAASHTO No.: M45-70 (1974)Standard Specification forAggregate for Masonry Mortar1This standard is issued under the fixed designation C144; the number immediately following the designation indicates the
2、 year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.
3、 Department of Defense.1. Scope Scope*1.1 This specification covers aggregate for use in masonry mortar.1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.3 The following precautionary caveat pertains only to the test meth
4、ods portion, Section 7, of this standard. This standard doesnot purport to address all of the safety problems,concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety safety, health, and healthenvironmental practices and determin
5、e the applicability ofregulatory limitations prior to use.1.4 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 issu
6、edby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C40 Test Method for Organic Impurities in Fine Aggregates for ConcreteC87 Test Method for Effect of Organic Impurities in Fine Aggregate on Strength of MortarC88 Test Method for S
7、oundness of Aggregates by Use of Sodium Sulfate or Magnesium SulfateC117 Test Method for Materials Finer than 75-m (No. 200) Sieve in Mineral Aggregates by WashingC123 Test Method for Lightweight Particles in AggregateC128 Test Method for Relative Density (Specific Gravity) and Absorption of Fine Ag
8、gregateC136 Test Method for Sieve Analysis of Fine and Coarse AggregatesC142 Test Method for Clay Lumps and Friable Particles in AggregatesC270 Specification for Mortar for Unit MasonryC404 Specification for Aggregates for Masonry GroutC1713 Specification for Mortars for the Repair of Historic Mason
9、ryD75 Practice for Sampling Aggregates3. Materials and Manufacture3.1 Aggregate for use in masonry mortar shall consist of natural sand or manufactured sand. Manufactured sand is the productobtained by crushing stone, gravel, or air-cooled iron blast-furnace slag specially processed to ensure suitab
10、le gradation.NOTE 1Care should be taken to ensure a suitable particle shape, since excessive quantities of flat and elongated particles have historically causedproblems with workability.4. Grading4.1 Aggregate for use in masonry mortar shall be graded within the following limits, depending upon whet
11、her natural sand ormanufactured sand is to be used:1 This specification is under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcommittee C12.04on Specifications for Aggregates for Mortars.Current edition approved July 1, 2011Dec.
12、 15, 2017. Published July 2011January 2018. Originally approved in 1939. Last previous edition approved in 20042011 asC144 04.C144 11. DOI: 10.1520/C0144-11.10.1520/C0144-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For A
13、nnual 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 indication of what changes have been made to the previous version. Becauseit may not
14、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 be considered the official document.*A Summary of Changes section appears at the end
15、of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Percent PassingSieve Designation Natural Sand ManufacturedSand4.75-mm (No. 4) 100 1002.36-mm (No. 8) 95 to 100 95 to 1001.18-mm (No. 16) 70 to 100 70 to 100600-m (No. 30)
16、 40 to 75 40 to 75300-m (No. 50) 10 to 35 20 to 40150-m (No. 100) 2 to 15 10 to 2575-m (No. 200) 0 to 5 0 to 104.2 The aggregate shall not have more than 50 % retained between any two consecutive sieves of those listed in 4.1 nor morethan 25 % between 300-m (No. 50) and the 150-m (No. 100) sieve.4.3
17、 If the fineness modulus varies by more than 0.20 from the value assumed in selecting proportions for the mortar, theaggregate shall be rejected unless suitable adjustments are made in proportions to compensate for the change in grading.NOTE 2For heavy construction employing joints thicker than 12.5
18、 mm (12 in.), a coarser aggregate may be desirable; for such work a fine aggregateconforming to Specification C404 is satisfactory.4.4 When an aggregate fails the gradation limits specified in 4.1 and 4.2, its use is permitted provided the mortar can be preparedto comply with the aggregate ratio, wa
19、ter retention, air content, and compressive strength requirements of the propertyspecifications of Specification C270.NOTE 3For exceptions for aggregate gradation for historic masonry, refer to Specification C1713, subsection 4.2.5. Composition5.1 Deleterious SubstancesThe amount of deleterious subs
20、tances in aggregate for masonry mortar, each determined onindependent samples complying with the grading requirements of Section 4, shall not exceed the following:Item Maximum PermissibleWeight PercentFriable particles 1.0Lightweight particles, floating on liquid havinga specific gravity of 2.00.5AA
21、 ThisThis requirement does not apply to blast-furnace slag aggregate.5.2 Organic Impurities:5.2.1 The aggregate shall be free of injurious amounts of organic impurities. Except as herein provided, aggregates subjectedto the test for organic impurities and producing a color darker than the standard s
22、hall be rejected.5.2.2 Aggregate failing in the test may be used, provided that the discoloration is due principally to the presence of smallquantities of coal, lignite, or similar discrete particles.5.2.3 Aggregate failing in the test may be used provided that, when tested for the effect of organic
23、 impurities on strength ofmortar, the relative strength at seven days calculated in accordance with the Procedure Section of Test Method C87, is not less than95 %.6. Soundness6.1 Except as herein provided, aggregate subjected to five cycles of the soundness test shall show a loss, weighted in accord
24、ancewith the grading of a sample complying with the limitations set forth in Section 4, not greater than 10 % when sodium sulfate isused or 15 % when magnesium sulfate is used.6.2 Aggregate failing to meet the requirements of 6.1 may be accepted, provided that mortar of comparable properties madefro
25、m similar aggregates from the same source has been exposed to weathering, similar to that to be encountered, for a period ofmore than five years without appreciable disintegration.7. Test Methods for Sampling and Testing7.1 Sample and test the aggregate in accordance with the following standards, ex
26、cept as otherwise provided in this specification:7.1.1 SamplingPractice D75.7.1.2 Sieve Analysis and Fineness ModulusMethod C136.7.1.3 Amount of Material Finer Than (75-m) No. 200 SieveTest Method C117.7.1.4 Organic ImpuritiesTest Method C40.7.1.5 Effect of Organic Impurities on StrengthTest Method
27、C87.7.1.6 Friable ParticlesTest Method C142.7.1.7 Lightweight ConstituentsTest Method C123.7.1.8 SoundnessTest Method C88.7.1.9 DensityDetermine the density of the fine aggregate in accordance with Test Method C128. In calculating the air contentof mortars, use the method described in Specification
28、C270.C144 1728. Keywords8.1 aggregate; fine aggregate; masonry; mortar; sand; soundnessSUMMARY OF CHANGESCommittee C12 has identified the location of selected changes to this standard since the last issue (C14411)that may impact the use of this standard. (December 15, 2017)(1) Added reference to C17
29、13 in Section 2.(2) Added Note 3, after 4.4, referring to exceptions listed in C1713 regarding historic masonry.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advis
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32、ou 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, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individua
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