1、Designation: C144 17C144 18 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*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 methods po
4、rtion, Section 78, of this standard. This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety, health, and environmental practices and determine the applicability of regu
5、latorylimitations 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 issuedby the World Trade Organi
6、zation Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C40C40/C40M Test Method for Organic Impurities in Fine Aggregates for ConcreteC87C87/C87M Test Method for Effect of Organic Impurities in Fine Aggregate on Strength of MortarC88C88/C88M Test Method for Soun
7、dness 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 WashingC123C123/C123M Test Method for Lightweight Particles in AggregateC128 Test Method for Relative Density (Specific Gravity) and Absorption of
8、Fine AggregateC136C136/C136M Test Method for Sieve Analysis of Fine and Coarse AggregatesC142C142/C142M Test Method for Clay Lumps and Friable Particles in AggregatesC270 Specification for Mortar for Unit MasonryC404 Specification for Aggregates for Masonry GroutC1180 Terminology of Mortar and Grout
9、 for Unit MasonryC1713 Specification for Mortars for the Repair of Historic MasonryD75D75/D75M Practice for Sampling Aggregates3. Terminology3.1 For definitions of terms used in this specification, refer to Terminology C1180.4. Materials and Manufacture4.1 Aggregate for use in masonry mortar shall c
10、onsist 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 suitable gradation.NOTE 1Care should be taken to ensure a suitable particle shape, since excessive quantities of flat a
11、nd elongated particles have historically causedproblems with workability.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 app
12、roved Dec. 15, 2017Dec. 1, 2018. Published January 2018December 2018. Originally approved in 1939. Last previous edition approved in 20112017as C144 11.C144 17. DOI: 10.1520/C0144-17.10.1520/C0144-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service
13、 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 indication of what changes have been made to the previous v
14、ersion. 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 be considered the official document.*A Summary of Changes s
15、ection appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Grading5.1 Aggregate for use in masonry mortar shall be graded within the following limits, depending upon whether natural sand ormanufacture
16、d sand is to be used:Percent 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) 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
17、105.2 The aggregate shall not have more than 50 % retained between any two consecutive sieves of those listed in 4.15.1 nor morethan 25 % between 300-m (No. 50) and the 150-m (No. 100) sieve.5.3 If the fineness modulus varies by more than 0.20 from the value assumed in selecting proportions for the
18、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 mm (12 in.), a coarser aggregate may be desirable; for such work a fine aggregateconforming to Specificat
19、ion C404 is satisfactory.5.4 When an aggregate fails the gradation limits specified in 4.15.1 and 4.25.2, its use is permitted provided the mortar can beprepared to comply with the aggregate ratio, water retention, air content, and compressive strength requirements of the propertyspecifications of S
20、pecification C270.NOTE 3For exceptions for aggregate gradation for historic masonry, refer to Specification C1713, subsection 4.2.6. Composition6.1 Deleterious SubstancesThe amount of deleterious substances in aggregate for masonry mortar, each determined onindependent samples complying with the gra
21、ding requirements of Section 45, shall not exceed the following:Item Maximum PermissibleWeight PercentFriable particles 1.0Lightweight particles, floating on liquid havinga specific gravity of 2.00.5AAThis requirement does not apply to blast-furnace slag aggregate.6.2 Organic Impurities:6.2.1 The ag
22、gregate 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 shall be rejected.6.2.2 Aggregate failing in the test may be used, provided that the discoloration is due
23、 principally to the presence of smallquantities of coal, lignite, or similar discrete particles.6.2.3 Aggregate failing in the test may be used provided that, when tested for the effect of organic impurities on strength ofmortar, the relative strength at seven days calculated in accordance with the
24、Procedure Section of Test Method C87C87/C87M, isnot less than 95 %.7. Soundness7.1 Except as herein provided, aggregate subjected to five cycles of the soundness test shall show a loss, weighted in accordancewith the grading of a sample complying with the limitations set forth in Section 45, not gre
25、ater than 10 % when sodium sulfateis used or 15 % when magnesium sulfate is used.7.2 Aggregate failing to meet the requirements of 6.17.1 may be accepted, provided that mortar of comparable properties madefrom similar aggregates from the same source has been exposed to weathering, similar to that to
26、 be encountered, for a period ofmore than five years without appreciable disintegration.8. Test Methods for Sampling and Testing8.1 Sample and test the aggregate in accordance with the following standards, except as otherwise provided in this specification:8.1.1 SamplingPractice D75D75/D75M.8.1.2 Si
27、eve Analysis and Fineness ModulusMethod C136C136/C136M.8.1.3 Amount of Material Finer Than (75-m) No. 200 SieveTest Method C117.8.1.4 Organic ImpuritiesTest Method C40C40/C40M.8.1.5 Effect of Organic Impurities on StrengthTest Method C87C87/C87M.8.1.6 Friable ParticlesTest Method C142C142/C142M.C144
28、 1828.1.7 Lightweight ConstituentsTest Method C123C123/C123M.8.1.8 SoundnessTest Method C88C88/C88M.8.1.9 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 C270.9. Keywords9.1 ag
29、gregate; fine aggregate; masonry; mortar; sand; soundnessSUMMARY OF CHANGESCommittee C12 has identified the location of selected changes to this standard since the last issue (C14417)that may impact the use of this standard. (December 1, 2018)(1) Added Section 3 and 3.1 referencing Terminology C1180
30、.SUMMARY 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 C1713 in Section 2.(2) Added Note 3, after 4.4, referring to exceptions listed in C1713 r
31、egarding 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 advised that determination of the validity of any such patent rights, and the riskof infrin
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