Designation: C 206 – 84 (Reapproved 1997) - Finishing Hydrated Lime1.pdf (tiêu chuẩn xây dựng)

Designation: C 206 – 84 (Reapproved 1997) Standard Specification for Finishing Hydrated Lime1 This standard is issued under the fixed designation C 206; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript 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. Scope 1.1 This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to portland-cement concrete. The two types of lime sold under this specification shall be designated as follows: 1.1.1 Type N—Normal hydrated lime for finishing purposes, and 1.1.2 Type S—Special hydrated lime for finishing purposes. Calcium and magnesium oxides (nonvolatile basis), min, % Carbon dioxide (as-received basis), max, % If sample is taken at the place of manufacture If sample is taken at any other place Unhydrated oxides (as-received basis), max, % Type N 95 Type S 95 5 7 ... 5 7 8 5. Residue 5.1 The percentage residue of finishing hydrated lime shall conform to the following requirements: Residue retained on No. 30 (600-µm) sieve, max, % Residue retained on No. 200 (75-µm) sieve, max, % NOTE 1—Type N, normal finishing hydrated lime, is differentiated from Type S, special finishing hydrated lime, in that no limitation on the amount of unhydrated oxides is specified for Type N hydrate, and the plasticity requirement for Type N hydrate shall be determined after soaking for 16 to 24 h. 0.5 15 6. Popping and Pitting 6.1 Finishing hydrated lime shall show no pops or pits when tested in accordance with the method prescribed in 10.1.2. 2. Referenced Documents 2.1 ASTM Standards: C 25 Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime2 C 50 Methods of Sampling, Inspection, Packing, and Marking of Lime and Limestone Products2 C 51 Terminology Relating to Lime and Limestone (As Used by the Industry)2 C 110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone2 C 842 Specification for Application of Interior Gypsum Plaster2 7. Plasticity 7.1 The putty made from Type N, normal finishing hydrated lime, shall have a plasticity figure of not less than 200 when soaked for a period of not less than 16 h nor more than 24 h. 7.2 The putty made from Type S, special finishing hydrated lime, shall have a plasticity figure of not less than 200 when tested commencing within 30 min after mixing with water. 8. Application of Interior Gypsum Plaster 8.1 For recommended application procedures refer to Specification C 842. 9. Sampling, Inspection, etc. 9.1 The sampling, inspection, rejection, retesting, packing, and marking shall be conducted in accordance with Methods C 50. 3. Terminology 3.1 Definitions—For definitions of terms relating to hydrated lime, refer to Terminology C 51. 4. Chemical Composition 4.1 Hydrated lime for finishing purposes shall conform to the following requirements as to chemical composition: 10. Test Methods 10.1 The properties enumerated in this specification shall be determined in accordance with the following methods: 10.1.1 Chemical Analysis—Test Methods C 25. 10.1.2 Physical Tests—Test Methods C 110. 1 This specification is under the jurisdiction of ASTM Committee C-7 on Lime and is the direct responsibility of Subcommittee C07.02 on Structural Lime. Current edition approved May 25, 1984. Published July 1984. Originally published as C 206 – 46. Replaces C 6 – 49 (1974). Last previous edition C 206 – 84. 2 Annual Book of ASTM Standards, Vol 04.01. 11. Package Marking 11.1 Type N hydrated lime, in bags, conforming to this specification shall be soaked for a minimum of 16 h prior to use. Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. 1 C 206 12. Keywords 12.1 finishing lime; masonry; plaster; plasticity; popping and pitting; residue; Type N; Type S; unhydrated oxides The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is copyrighted by ASTM, 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 above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org). 2

Designation: C 206 – 84 (Reapproved 1997) - Finishing Hydrated Lime1

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