SANS 1090-2009 Aggregates from natural sources - Fine aggregates for plaster and mortar《天然集料 灰泥和灰浆用细集料》.pdf

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 978-0-626-22571-1 SANS 1090:2009Edition 2.2Any reference to SABS 1090 is deemedto be a reference to this standard(Government Notice No. 1373 of 8 No

4、vember 2002)SOUTH AFRICAN NATIONAL STANDARD Aggregates from natural sources Fine aggregates for plaster and mortar Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 1090:2009 Edition 2.2

5、Table of changes Change No. Date Scope Amdt 1 2002 Amended to update referenced standards and to correct two entries in the table of contents. Amdt 2 2009 Amended to change the designation of SABS standards to SANS standards, with no technical changes. Foreword This South African standard was approv

6、ed 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 approved in April 2009. This document supersedes SABS 1090:2002 (edition 2.1).

7、NOTE The term “sand“ has been replaced by “fine aggregate“. Annex A forms an integral part of this document. Annexes B, C and D are for information only. Introduction This standard contains requirements for fine aggregates that have been derived from sources that yield material of suitable character

8、istics and that, after processing (for example, washing, if necessary), can be safely used for most plasters and mortars. However, it does not cover requirements for all the properties of a fine aggregate. Some of these properties might be important, especially with regard to long-term performance,

9、and if they are not established to be satisfactory, this could result in the production of plaster or mortar of inferior quality. Authoritative technical literature should be consulted for guidance on the further investigation of a fine aggregate, to verify its suitability for use in plaster or mort

10、ar for any particular application. Such further investigation might indicate that a fine aggregate that does not comply with the requirements of this standard could nevertheless be suitable for use in plaster or mortar for specific uses. It must be emphasized, however, that a fine aggregate that has

11、 been found satisfactory either in past performance or by other means, but that does not comply with all the requirements of this standard, may not be claimed to comply with it. Fine aggregates that do not comply with all the requirements of this standard should only be used after all the consequenc

12、es have been considered, and provided that the user possesses the necessary expertise in the use of such materials. SANS 1090:2009 Edition 2.2 1 Contents Page Foreword Introduction 1 Scope . 3 2 Normative references. 3 3 Definitions 4 4 Requirements. 4 5 Documentation. 6 6 Inspection and methods of

13、test 7 6.1 Inspection7 6.2 Test for grading and fineness modulus. 7 6.3 Test for dust content . 7 6.4 Test for methylene blue adsorption 7 6.5 Test for clay content 7 6.6 Test for organic impurities. 7 6.7 Test for soluble deleterious impurities 7 6.8 Test for drying shrinkage of mix 7 Annex A (norm

14、ative) Notes to purchasers 8 Amdt 1 Annex B (informative) Quality verification of fine aggregates for plaster or mortar other than laid down in the standard . 8 Amdt 1 Annex C (informative) Notes on tests and guidance on the use of fine aggregate for plaster and mortar 9 Annex D (informative) Biblio

15、graphy. 11 SANS 1090:2009 Edition 2.2 2 This page is intentionally left blank SANS 1090:2009 Edition 2.2 3 Aggregates from natural sources Fine aggregates for plaster and mortar 1 Scope This standard specifies requirements for fine aggregates from natural sources, for use in mortar and plaster. 2 No

16、rmative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. All standards are subject to revision and, since any reference to a standard is deemed to be a reference to the latest edition of that standard, parties to agr

17、eements based on this standard are encouraged to take steps to ensure the use of the most recent editions of the standards indicated below. Information on currently valid national and international standards can be obtained from the SABS Standards Division. SANS 201, Sieve analysis fines, content an

18、d dust content of aggregates. SANS 3310-1/ISO 3310-1, Test sieves Technical requirements and testing Part 1: Test sieves of metal wire cloth. Amdt 1 SANS 3310-2/ISO 3310-2, Test sieves Technical requirements and testing Part 2: Test sieves of perforated metal plate. Amdt 1 SANS 5832, Organic impurit

19、ies in fine aggregates (limit test). SANS 5834, Soluble deleterious impurities in fine aggregates (limit test). SANS 6243, Deleterious clay content of the fines in aggregate (methylene blue adsorption indicator test). SANS 6244, Particles of diameter not exceeding 20 m and not exceeding 5 m and smal

20、ler, respectively, in fine aggregate (pipette method). SANS 6254, Mortar tests Initial drying shrinkage and wetting expansion of mortar. SANS 1090:2009 Edition 2.2 4 3 Definitions For the purpose of this standard, the following definitions apply: 3.1 class of aggregate indication of the origin of th

21、e aggregate, as follows: 3.1.1 manufactured material produced by the mechanical crushing or milling of rock or gravel 3.1.2 natural material formed by the natural disintegration of rock 3.2 fine aggregate aggregate of particle size such that at least 90 % of its mass passes a sieve that has a square

22、 apertures of nominal size 4,75 mm and that no greater mass percentage than that permissible in terms of table 1 is retained on a sieve that has square apertures of nominal size 75 m 3.3 mortar mixture of fine aggregate and one or more cementitious binders and water, and that is used for the bedding

23、 and jointing of masonry units 3.4 plaster mixture of fine aggregate and one or more cementitious binders and water, and that is applied to surfaces (interior or exterior) other than floors, as a protective or as a decorative coating, or as both 3.5 type (of fine aggregate) indication of the use of

24、the aggregate, as follows: a) fine aggregate for use in plaster; or b) fine aggregate for use in mortar 4 Requirements 4.1 General Clause 4 contains the basic requirements for fine aggregates for use in plaster or mortar and that are known not to contain deleterious contaminants other than those for

25、 which limits have been laid down. It is acceptable that those basic requirements can be complied with by normal processing, for example by sieving or by washing with water (or both). Aggregates derived from sources that yield material of unknown or suspect mineralogical and performance characterist

26、ics shall be subjected to further testing and, for guidance on the interpretation of results so obtained, annex C should be consulted. (See also the introduction to this standard.) Fine aggregate for use in plaster or mortar may be either of two classes (see 3.1), as required (see annex A), and shal

27、l comply with the requirements given in table 1, appropriate to the type of fine aggregate required (see annex A). SANS 1090:2009 Edition 2.2 5 4.2 Fineness modulus The fine modulus of a fine aggregate shall not deviate by more than 0,2 from the value (if any) stated in the specification or contract

28、. The purchaser may state a range within which the fineness modulus has to fail. 4.3 Dust content The limits for dust content given in columns 2 and 3 of table 1 may be increased to 12,5 % and 17,5 % respectively, provided that the fine aggregate complies with the requirement for a) methylene blue a

29、dsorption value (see table 1), or b) clay content (see table 1). NOTE The following sequential procedure for the evaluation of a sample of fine aggregate in respect of dust and clay content is recommended: a) Determine the dust content and, if the value does not exceed the limits given in column 2 o

30、r 3 of table 1, as appropriate, accept the sample. b) If the dust content exceeds the limits given in column 2 or 3 of table 1, as appropriate, but does not exceed the increased values provided for above, conduct the methylene blue adsorption test. If the sample complies with the requirements given

31、in table 1 for this property, accept the sample. c) If the sample does not comply with the requirement for the methylene blue adsorption test, determine the clay content. If the clay content does not exceed the limit given in table 1, accept the sample. d) If the clay content exceeds the limit given

32、 in table 1, reject the sample. SANS 1090:2009 Edition 2.2 6 Table 1 Fine aggregate for plaster and mortar 1 2 3 4 Type Property Fine aggregate for plaster Fine aggregate for mortar Test method subsection Grading, mass percentage passing sieves1)that have square apertures of nominal size, m 4 750100

33、 100 6.2 2 3601 18060030015090704055 10010090652090704055 100 100 100 85 35 Dust content, material passing a 75 m sieve1), mass percentage, max. 7,52)12,52)6.3 Methylene blue adsorption value3)0,7 6.4 Clay content4), material of particle size smaller than 5 m, mass percentage, max. 2,0 6.5 Organic i

34、mpurities The colour of the liquid above the fine aggregate shall not be darker than the colour of the reference solution, except that this requirement shall not be applicable if the fine aggregate complies with the requirement for soluble deleterious impurities. 6.6 Soluble deleterious impurities T

35、he strength of mortar specimens made with the fine aggregate shall not be less than 85 % of that of the specimens made with the same fine aggregate after has been washed. 6.7 Drying shrinkage of mix, %, max.5)0,10 0,12 6.8 1) Complying with SANS 3310-1 or SANS 3310-2. 2) These limits may be exceeded

36、 under certain circumstances (see 4.3). 3) Applicable only if dust content exceeds limit given in the table (see 4.3). 4) Applicable only if dust content is and methylene adsorption value exceed the relevant limits given in the table (see 4.3). For the purpose of this requirement, the clay content i

37、s defined as the 5 m material which might not all be clay minerals. The clay content of this 5 m fraction is likely to be appreciable if the methylene blue adsorption value exceeds the limit given in the table. 5) These limits may be raised to 0,12 % and 0,14 % respectively, provided that the exposu

38、re conditions are known to be mild or, historically, the safe use has been validated. Amdt 15 Documentation The following information shall appear on the documents that accompany each delivery of fine aggregate or that pertain to each bin or stockpile of fine aggregate: the type, i.e. fine aggregate

39、 for plaster or fine aggregate for mortar. SANS 1090:2009 Edition 2.2 7 6 Inspection and methods of test 6.1 Inspection Visually examine each delivery of fine aggregate to ensure that the description of the commodity complies with order requirements and that the commodity has not been contaminated w

40、ith foreign matter. 6.2 Test for grading and fineness modulus Use SANS 201. 6.3 Test for dust content Use SANS 201. 6.4 Test for methylene blue adsorption Use SANS 6243. 6.5 Test for clay content Use SANS 6244. 6.6 Test for organic impurities Use SANS 5832. 6.7 Test for soluble deleterious impuritie

41、s Use SANS 5834. 6.8 Test for drying shrinkage of mix Use SANS 6254. SANS 1090:2009 Edition 2.2 8 Annex A (normative) Notes to purchasers A.1 The following requirements shall be specified in tender invitations and in each order or contract: a) the class of fine aggregate (see 4.1); and b) the type o

42、f fine aggregate (see 4.1). A.2 The following requirements shall be agreed upon between the supplier and the purchaser: a) when relevant, the range within which the fineness modulus is to fail (see 4.2); and b) the grading of the fine aggregate, if other than as given in table 1 (see C.2.1). Annex B

43、 (informative) Quality verification of fine aggregates for plaster or mortar other than laid down in this standard B.1 When a purchaser requires ongoing verification of the quality of fine aggregate, it is suggested that, instead of concentrating solely on evaluation of the final product, he also di

44、rect 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 control or testing during manufacture is available to help in the assess

45、ment 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 aggregates produced to this standard complies with the requirements of this standard, a sampling plan based on applicable statistical pri

46、nciples should be agreed upon between the supplier and purchaser. It must be noted that: a) such a sampling plan applies to ready-for-use fine aggregates sampled in accordance with an agreed procedure only, and b) if, in terms of the sampling plan, the applicable procedures given in SANS 195 are to

47、be used, a clear statement should be made as to the objective of the sampling as described in the method. SANS 1090:2009 Edition 2.2 9 Annex C (informative) Notes on tests and guidance on the use of fine aggregate for plaster and mortar C.1 General C.1.1 The notes in this annex are of very general n

48、ature, since specific details can best be obtained from authoritative literature that contains expert knowledge on the various aspects related to mortar or plaster and its constituents, and on the judicious use of fine aggregates for mortar or plaster. C.1.2 Any information given in publications ref

49、erred to in C.1.1 in the form of guidance or recommendations should not be construed as being alternative or optional requirements to those specified in the standard but as additional information to assist in the assessment of fine aggregate for its suitability for use in plaster and mortar, especially for special applications. Tests for the determination of properties additional to those covered in this standard should, wherever possible, be conducted in accordance with SANS standard methods. C.2 Notes on tests C.2.1 Tests specified in this