1、Designation: C 207 06Standard Specification forHydrated Lime for Masonry Purposes1This standard is issued under the fixed designation C 207; 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 par
2、entheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers four types of hydrated lime.Types N and
3、S are suitable for use in mortar, in scratch andbrown coats of cement plaster, for stucco, and for addition toportland-cement concrete. Types NA and SA are air-entrainedhydrated limes that are suitable for use in any of the above useswhere the inherent properties of lime and air-entrainment aredesir
4、ed. The four types of lime sold under this specificationshall be designated as follows:1.1.1 Type NNormal hydrated lime for masonry purposes.1.1.2 Type SSpecial hydrated lime for masonry purposes.1.1.3 Type NANormal air-entraining hydrated lime formasonry purposes.1.1.4 Type SASpecial air-entraining
5、 hydrated lime formasonry purposes.NOTE 1Type S, special hydrated lime, and Type SA, special air-entraining hydrated lime, are differentiated from Type N, normal hydratedlime, and Type NA, normal air-entraining hydrated lime, principally bytheir ability to develop high, early plasticity and higher w
6、ater retentivity,and by a limitation on their unhydrated oxide content.NOTE 2For normal (Type N) and special (Type S) finishing hydratedlime, refer to Specification C 206.NOTE 3Some building codes prohibit the use of air-entraining mate-rials in mortar, because of the accompanying reduction in bond
7、andcompressive strength. Where increased freeze-thaw resistance is impor-tant, air-entraining may be beneficial. Air-entraining lime should not beused as a finishing lime.NOTE 4For lime putty, refer to Specification C 1489.1.2 This standard does not purport to address all of thesafety concerns, if a
8、ny, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applicabil-ity of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C25 Test Methods for Chemical Analysis of Limesto
9、ne,Quicklime, and Hydrated LimeC50 Practice for Sampling, Sample Preparation, Packag-ing, and Marking of Lime and Limestone ProductsC110 Test Methods for Physical Testing of Quicklime,Hydrated Lime, and LimestoneC 206 Specification for Finishing Hydrated LimeC 226 Specification for Air-Entraining Ad
10、ditions for Use inthe Manufacture of Air-Entraining Hydraulic CementC 778 Specification for SandC 1489 Specification for Lime Putty for Structural Purposes3. Terminology3.1 Definitions:3.1.1 standard mortar, na mortar containing only hy-drated lime and sand meeting the requirements of SpecificationC
11、 778. The mortar proportions are one part hydrated lime tothree parts of sand by volume as indicated in Table 4 of TestMethods C110.4. Additions4.1 Types NA and SA hydrated lime covered by thisspecification shall contain additives for the purpose of entrain-ing air, and such additives shall conform
12、to the requirements ofSpecification C 226.5. Manufacturers Statement5.1 At the request of the purchaser, the manufacturer shallstate in writing the nature, amount, and identity of theair-entraining agent used and of any processing addition thatmay have been used, and also, if requested, shall supply
13、 testdata showing compliance of such air-entraining addition withthe provisions of Specification C 226.1This specification is under the jurisdiction of ASTM Committee C07 on Limeand is the direct responsibility of Subcommittee C07.02 on Structural Lime.Current edition approved Jan. 1, 2006. Publishe
14、d January 2006. Originallyapproved in 1946. Last previous edition approved in 2005 as C 207 05.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Documen
15、t Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Chemical Composition6.1 Hydrated lime for masonry purposes shall conform tothe following requirements as to chemical composition:Hydrate Types:NNA S
16、 SACalcium and magnesium oxides(nonvolatile basis), min, %95 95 95 95Carbon dioxide (as-receivedbasis), max, %:If sample is taken at place ofmanufacture55 5 5If sample is taken at any otherplace77 7 7Unhydrated oxides (as-receivedbasis), max, % 8 87. Residue, Popping, and Pitting7.1 The four types o
17、f hydrated lime for masonry purposesshall conform to one of the following requirements:7.1.1 The residue retained on a No. 30 (600-m) sieve shallnot be more than 0.5 %, or7.1.2 If the residue retained on a No. 30 (600-m) sieve isover 0.5 %, the lime shall show no pops or pits when tested inaccordanc
18、e with the method prescribed in 12.1.2.8. Plasticity8.1 The putty made from Type S, special hydrate, or TypeSA, special air-entraining hydrate, shall have a plasticity figureof not less than 200 Elmey units when tested within 30 minafter mixing with water using Test Methods C110.9. Water Retention9.
19、1 Hydrated lime mortar made with Type N (normalhydrated lime) or Type NA (normal air-entraining hydratedlime), after suction for 60 s, shall have a water retention valueof not less than 75 % when tested in a standard mortar madefrom the dry hydrate or from putty made from the hydratewhich has been s
20、oaked for a period of 16 to 24 h.9.2 Hydrated lime mortar made with Type S (special hy-drated lime) or Type SA (special air-entraining hydrated lime),tested in accordance with Section 10 of Test Methods C110,shall have a water retention value of not less than 85 % whentested in a standard mortar mad
21、e from the dry hydrate usingTest Methods C110.10. Air-Entrainment10.1 The hydrated lime covered by Types N or S in thisspecification shall contain no additives for the purpose ofentraining air. The air content of a standard mortar made withTypes N or S shall not exceed 7 % as determined in accordanc
22、ewith the requirements of Section 13 of Test Methods C110.The air content of standard mortar made with Types NA or SAshall have a minimum of 7 % and a maximum of 12 % whentested in accordance with the requirements of Section 13 ofTest Methods C110.11. Sampling and Inspection11.1 The sampling, inspec
23、tion, rejection, retesting, packag-ing, and marking shall be conducted in accordance withPractice C50.12. Test Methods12.1 Determine the properties enumerated in this specifica-tion in accordance with the following methods:12.1.1 Chemical Analysis Test Methods C25.12.1.2 Physical TestsTest Methods C
24、110.13. Special Package Marking13.1 When Types NAor SAair-entraining hydrated lime aredelivered in packages, the name and brand of the manufacturer,the type under this specification, and the words “AIR-ENTRAINING” shall be plainly indicated thereon or in case ofbulk shipments, so indicated on shippi
25、ng notices.14. Keywords14.1 hydrated lime; masonry; mortar; plasticity; poppingand pitting; residue; stucco; Type N; Type NA; Type S; TypeSA; unhydrated oxides; water retention; air entrainingASTM International takes no position respecting the validity of any patent rights asserted in connection wit
26、h 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 infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible techn
27、ical 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. Your comments will receive careful considerati
28、on 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 copyrighted by ASTM International, 100 Barr Har
29、bor 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).C207062
