SANS 523-2009 Limes for use in building《建筑用石灰》.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23542-0 SANS 523:2009Edition 2.3SOUTH AFRICAN NATIONAL STANDARD Limes for use in building Published by SABS Standards Division 1 Dr Latega

4、n Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 523:2009 Edition 2.3 Table of changes Change No. Date Scope Amdt 1 2002 Amended to replace reference to SABS 197 which has been withdrawn, with reference to SABS ISO 3310, to replace re

5、ference to SABS ISO 9001, SABS ISO 9002 and SABS ISO 9003 with SABS ISO 9001 and to make editorial changes. Amdt 2 2007 Amended to change the designation of SABS standards to SANS standards and to move reference to national legislation to the foreword. Amdt 3 2009 Amended to change the chemical comp

6、osition of a type of lime. Foreword This South African standard was approved by National Committee SABS SC 59A, Construction standards Cement, lime and concrete, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was publi

7、shed in December 2009. This document supersedes SANS 523:2007 (edition 2.2). A vertical line in the margin shows where the text has been technically modified by amendment No. 3. Reference is made in 6.1 to “relevant legislation”. In South Africa this means the Trade Metrology Act, 1973 (Act No. 77 o

8、f 1973) (as amended). Amdt 2 Annex A forms an integral part of this document. Annexes B, C and D are for information only. SANS 523:2009 Edition 2.3 1 Contents Page Foreword 1 Scope 3 2 Normative references 3 3 Definitions . 4 4 Requirements 5 5 Inspection and methods of test. 6 5.1 Inspection. 6 5.

9、2 Chemical tests 6 5.3 Physical tests . 7 6 Packing and marking 7 Annex A (normative) Notes to purchasers 9 Annex B (informative) Quality verification of limes for building. 9 Annex C (informative) Notes on tests and guidance on the use of limes for use in building. 10 Annex D (informative) Safety p

10、recautions and first aid . 13 Bibliography. 14 SANS 523:2009 Edition 2.3 2 This page is intentionally left blank SANS 523:2009 Edition 2.3 3 Limes for use in building 1 Scope This standard covers quicklime and slaked (hydrated) limes for use in building and produced by a) calcining of limestone, or

11、b) treatment of calcium carbide. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to any of these publications do not apply. However, parties to agree

12、ments based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative documents referred to applies. Information on currently valid national and internati

13、onal standards and other publications can be obtained from the SABS Standards Division. SANS 3310-1/ISO 3310-1, Test sieves Technical requirements and testing Part 1: Test sieves of metal wire cloth. Amdt 1 SANS 6292, Lime tests Chemical analysis Sample preparation and reagents. SANS 6293, Lime test

14、s Calcium oxide content. SANS 6294, Lime tests Magnesium oxide content. SANS 6295, Lime tests Carbon dioxide content. SANS 6298, Lime tests Loss on ignition. SANS 6299, Lime tests Physical properties Sample preparation. SANS 6300, Lime tests Isothermal slaking and preparation of quicklime. SANS 6301

15、, Lime tests Fineness. SANS 6302, Lime tests General expansion. SANS 6305, Lime tests Pat soundness. SANS 6306, Lime tests Autoclave expansion. SANS 6307, Lime tests Plasticity. SANS 6308, Lime tests Sulfur trioxide content. SANS 523:2009 Edition 2.3 4 3 Definitions For the purposes of this standard

16、, the following definitions apply: 3.1 acceptable acceptable to the authority administering this standard, or to the parties concluding the purchase contract, as relevant Amdt 1 3.2 dolomitic lime lime prepared from dolomite 3.3 dry hydrated lime hydrated lime in the form of a dry powder 3.4 high-ca

17、lcium lime lime prepared from limestone that consists essentially of calcium carbonate 3.5 hydrated lime slaked lime quicklime that has been suitably treated with water or steam (or both) and has reacted with the water or steam 3.6 magnesium lime lime prepared from a limestone that consists mainly o

18、f calcium hydroxide but has a magnesium carbonate content between that of a high-calcium limestone and a dolomite 3.7 masonry lime bedding mortar lime used solely for mortar for bedding brickwork, block construction, and stone masonry 3.8 normal lime lime having an Emley plasticity below 200 3.9 pla

19、ster lime lime intended for use in undercoat and single-coat sanded plasters 3.10 plastic lime lime characterized by easy workability and good water retentivity and having an Emley plasticity value of 200 or more 3.11 putty plaster lime paste lime in the form of a paste and that is specially prepare

20、d for putty plaster work 3.12 quicklime calcined limestone (or dolomite) that consists essentially of calcium oxide (or of calcium and magnesium oxides) SANS 523:2009 Edition 2.3 5 4 Requirements 4.1 Type Lime shall be one of the types given in table 1, as specified by the purchaser (see annex A). T

21、able 1 Types 1 2 3 4 5 6 Type designation Hydrated lime QuicklimeaGeneral Plastic Normal Plastic Normal Suitable applicationsbA1P (Dry powder) B1P Putty plaster A1PW (Wet paste) Finish coat plasters (neat or sanded); undercoat and single-coat sanded plasters; bedding mortars Plaster A2P A2 B2P B2 Un

22、dercoat and single-coat sanded plasters; bedding mortars Bedding mortar A3P A3 B3P B3 Bedding mortars aUnless quicklimes are correctly processed they will not necessarily yield suitable building limes. (See also annex C.) bFor guidance only. 4.2 Chemical composition When tested in accordance with cl

23、ause 5, the lime shall comply with the appropriate requirements given in table 2. Table 2 Chemical composition 1 2 3 4 5 6 7 Chemical composition, % (m/m) CaO+MgO (“ignited mass“ basis) CaO (“ignited mass“ basis) CO2(“as received“ basis) max. SO3(“as received“ basis) Loss on ignition (“at works“ bas

24、is) Type designation min. min. at works elsewhere max. max. A1P and A1PW 7,0 1,0 N/A B1P 85,0 50,0 5,0 10,0 1,5 5,0 A2P and A2 10,0 1,0 N/A B2P and B2 80,0 45,0 8,0 10,0 1,5 10,0 A3P and A3 7,0 1,0 N/A B3P and B3 70,0 40,0 5,0 10,0 1,5 10,0 N/A = not applicable. Amdt 3SANS 523:2009 Edition 2.3 6 4.3

25、 Physical requirements When tested in accordance with clause 5, the lime shall comply with the appropriate requirements given in table 3. Table 3 Physical requirements 1 2 3 4 5 6 Fineness, percentage remaining on sievesamax. Nominal aperture size of sieve m General expansion, soundness factor Autoc

26、lave expansion, % Emley plasticity value after 30 minute soak Type designation 850 600 300 75 Pat soundnessmax. max. min. A1P and A1PW N/A 0 0,5 15,0 N/A 1,00 200 A2P 200 A2 0 0,5 N/A 30,0 No popping, pitting or disinte- gration 30 N/A N/A A3P 200 A3 0 25,0 N/A 50,0 N/A 30 N/A N/A B1P 1,0 N/A 2,0 N/

27、A N/A 1,00 200 B2P 200 B2 1,0 N/A 2,0 N/A No popping, pitting or disinte- gration 30 N/A N/A B3P 200 B3 5,0 N/A 10,0 N/A N/A 30 N/A N/A aComplying with SANS 3310-1. N/A = not applicable. Amdt 15 Inspection and methods of test 5.1 Inspection Visually examine each bulk delivery of lime to ensure that

28、the description of the commodity complies with order requirements and that the commodity has not been contaminated with foreign matter. Check bagged lime for breakages and contamination. 5.2 Chemical tests 5.2.1 Chemical analysis For the preparation of test specimens and reagents, use SANS 6292. 5.2

29、.2 Calcium oxide content Use SANS 6293. SANS 523:2009 Edition 2.3 7 5.2.3 Magnesium oxide content Use SANS 6294. 5.2.4 Carbon dioxide content Use SANS 6295. 5.2.5 Loss on ignition Use SANS 6298. 5.2.6 Sulfur trioxide content Use SANS 6308. 5.3 Physical tests 5.3.1 Physical properties For the prepara

30、tion of test specimens, use SANS 6299. 5.3.2 Isothermal slaking and preparation of quicklime Use SANS 6300. 5.3.3 Fineness Use SANS 6301. 5.3.4 General expansion Use SANS 6302. 5.3.5 Pat soundness Use SANS 6305. 5.3.6 Autoclave expansion Use SANS 6306. 5.3.7 Plasticity Use SANS 6307. 6 Packing and m

31、arking 6.1 Packing Unless supplied in bulk, lime shall be packed in quantities of 10 kg, 20 kg, 25 kg, 40 kg or 50 kg net, in airtight containers that are capable of withstanding normal handling and transportation in the case of dry hydrated limes, and in suitable sealed metal containers (or, when c

32、rushed to a grain size smaller than 13,2 mm, in bituminous-lined paper pockets) in the case of quicklime. (See the relevant legislation (see foreword).) Amdt 2 SANS 523:2009 Edition 2.3 8 6.2 Marking Each container (or in the case of bulk supply by road or rail, a label firmly attached to the vehicl

33、e) shall be legibly and indelibly marked with the following: a) manufacturers name or trade mark; b) net mass (in kilograms) of contents when packed; and c) the appropriate type designation, description, and cautionary note given in table 4. Table 4 Information to be marked on containers 1 2 3 Type

34、designation Description Cautionary note A1P Plastic hydrated lime for putty plaster, sanded plaster, and bedding mortar A1PW Plastic hydrated lime for putty plaster (paste) A2P Plastic hydrated lime for plaster and bedding mortar A2 Normal hydrated lime for plaster and bedding mortar Do not use for

35、putty plasters A3P Plastic hydrated lime for bedding mortar A3 Normal hydrated lime for bedding mortar Do not use for plasters B1P Plastic quicklime for putty plaster, sanded plaster and bedding mortar Slake and prepare before use B2P Plastic quicklime for plaster and bedding mortar B2 Normal quickl

36、ime for plaster and bedding mortar Slake and prepare before use. Do not use for putty plasters B3P Plastic quicklime for bedding mortar B3 Normal quicklime for bedding mortar Slake and prepare before use. Do not use for plasters SANS 523:2009 Edition 2.3 9 Annex A (normative) Notes to purchasers The

37、 following requirements shall be specified in tender invitations and in each order or contract: The type (see 4.1). Annex B (informative) Quality verification of limes for building B.1 When a purchaser requires ongoing verification of the quality of limes for building, it is suggested that, instead

38、of concentrating solely on evaluation of the final product, he also direct his attention to the manufacturers quality system. In this connection it should be noted that SANS 9001 covers the provision of an integrated quality system. Amdt 1 B.2 If no information about the implementation of quality co

39、ntrol or testing during manufacture is available to help in the assessing of the quality of a consignment, and a purchaser wishes to establish, by inspection and testing of samples of the final product, whether a consignment of the lime produced to the standard complies with the requirements of this

40、 standard, a sampling plan based on applicable statistical principles should be agreed upon between the supplier and the purchaser or certification body. It should be noted that such sampling plan applies to ready-for-use limes for use in building sampled in accordance with an agreed procedure. SANS

41、 523:2009 Edition 2.3 10 Annex C (informative) Notes on tests and guidance on the use of limes for use in building C.1 General C.1.1 The notes in this annex are of a very general nature. Specific details can best be given by authoritative literature (e.g. SANS 10164-1), that contain expert informati

42、on on the various aspects related to lime for use in buildings and its constituents, and on the judicious use of limes for building. C.1.2 Any information given in publications referred to in C.1.1 in the form of guidance or recommendations should not be construed as alternative or optional requirem

43、ents to those specified in this standard, but as additional information to assist in the assessment of lime for its suitability for use in buildings, especially for special applications. Tests for the determination of properties additional to those covered in this standard should, wherever possible,

44、 be conducted in accordance with South African national standard methods (see C.2.2). C.2 Notes on tests C.2.1 Tests specified in this standard Although it is implied in the preface to this standard that lime that complies with the requirements of this standard can be safely used in most buildings,

45、it should be realized that the limits for some requirements, for example those for fineness, are fairly wide and that for specific applications the requirements might need to be confined to closer limits, or to such limits as agreed upon, appropriate to the intended use. Less time-consuming test met

46、hods than those specified in this standard may be used if the results obtained are proven trustworthy, but in the event of a dispute, only the test methods prescribed in this standard are valid as references. It is not possible to cover all possible circumstances in a standard and therefore authorit

47、ative literature as referred to in C.1.1, should be consulted, especially as far as performance is concerned. C.2.2 Tests for properties not covered in the standard Clause 4 lists the basic requirements covered in this standard. Examples of additional properties that can be determined and for which

48、interpretation of the results will be required, are listed below, together with a relevant test method: a) The presence of sulfates: SANS 5850 (both parts). b) Presence of material of low-density: SANS 5837. c) Alkali-silica reactivity: SANS 6245. d) Chloride content: SANS 202. e) Electric conductiv

49、ity: SANS 6240. SANS 523:2009 Edition 2.3 11 C.2.3 Lime that complies with the requirements of this standard As stated in C.2.1, the actual properties of lime that complies with the requirements of this standard should be considered to ensure that limes for use in buildings are so proportioned that the performance required for a particular application is obtained. C.2.4 Lime that does not comply with the requirements of this standard Where a lime has to be used that does not comply with the requirements of this standard, care sho