SANS 50196-3-2006 Methods of testing cement Part 3 Determination of setting times and soundness《水泥试验方法 第3部分 凝固时间和坚固性测定》.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. ICS 91.100.10 ISBN 0-626-17598-4 SANS 50196-3:2006Edition 2EN 196-3:2005Edition 2SOUTH AFRICAN NATIONAL STANDARD Methods of testing cement Part 3: Determ

4、ination of setting times and soundness This national standard is the identical implementation of EN 196-3:2005 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428

5、7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50196-3:2006 Edition 2 EN 196-3:2005 Edition 2 Table of changes Change No. Date Scope Abstract Specifies the methods for determining standard consistence, setting times and soundness of cement. It applies

6、to common cements and to other cements and materials. It may not apply to other cement types that have, for example, a very short initial setting time. It is used for assessing whether the setting time and soundness of a cement are in conformity with its specification. Keywords binding agents, cemen

7、ts, congealing point, construction, construction materials, determination, laboratory testing, Le Chatelier apparatus, methods, reference methods, setting, setting time, solidification point, soundness, specification (approval), specifications, specimen preparation, test equipment, testing. National

8、 foreword This South African standard was approved by National Committee StanSA SC 5120.61A, Construction standards Cement, lime and concrete, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS edition cancels and replaces the firs

9、t SABS edition (SABS EN 196-3:1994). In South Africa, the preferred temperature of the air in the laboratories where the tests are carried out is 22 C to 25 C. Where test specimens are stored in water, the preferred temperature of the water in the laboratories where the tests are carried out is 22 C

10、 to 24 C. EUROPEAN STANDARD EUROPAlSCHE NORM February 2005 ICS 91.100.10 Supersedes EN 196-3: 1994 English version Methods of testing cement - Part 3: Determination of setting times and soundness Methodes dessais des ciments - Partie 3: Determination des temps de prise et de ia stabilite Prufverfahr

11、en fur Zement - Teil 3: Bestimmung der Erstarrungszeiten und der Raumbestandigkeit This European Standard was approved by CEN on 29 December 2004 CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a

12、 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version

13、in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officiai versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia,

14、Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORA,iALISATION EUROPAISCHES K

15、OMITEE FUR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels O 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 196-3:2005: E EN 196-3:2005 (E) Contents Page Foreword . 3 1 Scope 5 2 Normative references . 5 3 Prin

16、ciples . 5 . 4 Laboratory. equipment and materials 5 4.1 Laboratory . 5 4.2 Equipment and materials . 6 5 Standard consistence test . 6 5.1 Apparatus 6 5.2 Procedure 7 6 Setting time test 9 6.1 Apparatus 9 6.2 Determination of initial setting time 10 6.3 Determination of final setting time 11 7 Soun

17、dness test . 11 7.1 Apparatus 11 7.2 Procedure . 14 7.3 Report . 14 7.4 Retest . 14 EN 196-312005 (E) Foreword This document (EN 196-2:2005) has been prepared by Technical Committee CENITC 51 Cement and building limes, the secretariat of which is held by IBNIBIN. This European Standard shall be give

18、n the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2005, and conflicting national standards shall be withdrawn at the latest by August 2005. This European Standard supersedes EN 196-3:1994. This European Standard on the methods

19、of testing cement comprises the following Parts: EN 196-1, Methods of testing cement - Pan! I: Determination of strength EN 196-2, Methods of testing cement - Pan! 2: Chemical analysis of cement EN 196-3, Methods of testing cement - Pan! 3: Determination of setting time and soundness EN 196-5, Metho

20、ds of testing cement - Part 5: Pozzolanicity test for pozzolanic cements EN 196-6, Methods of testing cement - Part 6: Determination of fineness EN 196-7, Methods of testing cement - Pan! 7: Methods of taking and preparing samples of cement EN 196-8, Methods of testing cement - Pan! 8: Heat of hydra

21、tion - Solution method EN 196-9, Methods of testing cement - Pan! 9: Heat of hydration - Semi-adiabatic method NOTE A previous part, EN 196-21: Methods of testing cement - Part 21: Determination of the chloride, carbon dioxide and alkali content of cement, has been revised and incorporated into EN 1

22、96-2. Another document, ENV 196-4 Methods of testing cement - Part 4: Quantitative determination of constituents, has been drafted and will be published as a CEN Technical Report. This edition introduces the following technical changes based on comments received by the secretariat: a) requirement fo

23、r the laboratory relative humidity is reduced to a minimum of 50 % from a minimum of 65 % (4.1); b) drinking water is permitted for storing and boiling test specimens (4.2.5); drinking water is no longer permitted in the production of paste since such water varies in quality between places and even

24、with time in the same laboratory (4.2.5); c) the Vicat mould is permitted to be cylindrical in addition to truncated conical shape (5.1); d) the time permitted for scraping paste from the sides and bottom of the mixing bowl is increased from 15 s to 30 s (5.2.1); e) the end-point for the determinati

25、on of standard consistence is increased to (6 ? 2) mm from (6 + I) mm (5.2.3); EN 196-3:2005 (E) f) the determination of setting time is carried out whilst the specimen is immersed in water (Clause 6); g) in the determination of setting time the tolerance on storage temperature for specimens is redu

26、ced to (20,O ? 1,O) “C from (20 + 1) “C (6.1.3); h) in the determination of setting time automatic apparatus conforming to the requirements of the reference method is permitted (6.1 .I); i) the end-point for the determination of initial setting time is increased to (6 2 3) mm from (4 + I) mm (6.2.2)

27、; j) the end-point for the determination of final setting time is required to be confirmed by testing in two additional positions in the test specimen (6.3.1); k) the material of construction of the Le Chatelier apparatus for determination of soundness is extended to any non-corrodible spring metal

28、(7.1 .I); I) the minimum relative humidity in which specimens for determination of soundness are to be stored is reduced to 90 % from 98 % (7.1.3); m) the determination of soundness is carried out once (7.2); n) where a retest of the determination of soundness is required the relative humidity at wh

29、ich the cement sample is stored is reduced to 50 % from 65 % (7.4). According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, F

30、rance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 196-3:2005 (E) 1 Scope This document specifies the methods for determining standard consistence

31、, setting times and soundness of cements. The method applies to common cements and to other cements and materials, the standards for which call up this method. It may not apply to other cement types that have, for example, a very short initial setting time. The method is used for assessing whether t

32、he setting time and soundness of a cement is in conformity with its specification. This document describes the reference methods and allows the use of alternative procedures and equipment, as indicated in notes, provided that they have been calibrated against the reference methods. In the event of a

33、 dispute, only the reference equipment and procedures are used. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documen

34、t (including any amendments) applies. EN 196-1, Methods of testing cement - Part I: Determination of strength 3 Principles Cement paste of standard consistence has a specified resistance to penetration by a standard plunger. The water required for such a paste is determined by trial penetrations of

35、pastes with different water contents. The setting time is determined by observing the penetration of a needle into cement paste of standard consistence until it reaches a specified value. The soundness is determined by observing the volume expansion of cement paste of standard consistence as indicat

36、ed by the relative movement of two needles. 4 Laboratory, equipment and materials 4.1 Laboratory The laboratory in which specimens are prepared and tested shall be maintained at a temperature of (20 ? 2) “C and a relative humidity of not less than 50 %. The temperature and relative humidity of the a

37、ir in the laboratory and the temperature of the water in the storage containers shall be recorded at least once per day during working hours. Cement, water and apparatus used to make and test specimens shall be at a temperature of (20 ? 2) “C. Where temperature ranges are given, the target temperatu

38、re at which the controls are set shall be the middle value of the range. EN 196-3:2005 (E) 4.2 Equipment and materials 4.2.1 General requirements The tolerances shown in Figures 1 and 2 are important for correct operation of the equipment in the testing procedure. When regular control measurements s

39、how that the tolerances are not met, the equipment shall be rejected, adjusted or repaired. Records of control measurements shall be kept. Acceptance measurements on new equipment shall cover mass, volume, and dimensions to the extent that these are indicated in this document paying particular atten

40、tion to those critical dimensions for which tolerances are specified. In those cases where the material of the equipment can influence the results, the material is specified and shall be used. The approximate dimensions shown in the figures are provided as guidance to equipment manufacturers or oper

41、ators. Dimensions which include tolerances are obligatory. 4.2.2 Balance, capable of weighing to an accuracy of + 1 g. 4.2.3 Graduated cylinder or burette, capable of dispensing to an accuracy of? 1 ml 4.2.4 Mixer, conforming to EN 196-1. NOTE A more homogeneous paste is produced at the lower limit

42、of tolerance for the clearance between the blade and the bowl. 4.2.5 Water, distilled or deionized water shall be used for making the specimens. Drinking water may be used for storing and boiling specimens. 4.2.6 Timer, capable of measuring to an accuracy of? 1 s. 4.2.7 Ruler, capable of measuring t

43、o an accuracy of? 0,5 mm 5 Standard consistence test 5.1 Apparatus Use the manual Vicat apparatus as shown in Figure 1 a) and 1 b) with the plunger shown in Figure 1 c). The plunger shall be of non-corrodible metal in the form of a right cylinder of at least 45 mm effective length and of (10,OO ? 0,

44、05) mm diameter. The total mass of moving parts shall be (300 + 1) g. Their movement shall be truly veltical and without appreciable friction, and their axis shall coincide with that of the plunger. The Vicat mould (see Figure 1 a) to contain the paste under test shall be of hard rubber, plastics or

45、 brass. It shall be of cylindrical or preferably truncated conical form (40,O ? 0,2) mm deep and shall have an internal diameter of (75 + 10) mm. It shall be adequately rigid and shall be provided with a base-plate larger than the mould and at least 2,5 mm thick, constructed of impermeable material

46、resistant to attack by cement paste, e.g. plane glass. NOTE 1 Moulds of other metal may be used provided that they are of the specified depth and that their use has been calibrated against the specified mould, NOTE 2 It is recommended that a laboratory uses base plates of equal thickness in order th

47、at the scale of the Vicat apparatus has only to be adjusted once for several determinations. EN 196-3:2005 (E) 5.2 Procedure 5.2.1 Mixing the cement paste Weigh, to an accuracy of +I g, by means of the balance (4.2.2), 500 g of cement and a quantity of water, e.g. 125 g. When water is measured by vo

48、lume using the graduated cylinder or burette (4.2.3) it shall be dispensed to an accuracy of + 1 ml. Mix each batch of paste mechanically using the mixer (4.2.4). The timing of the various mixing stages refers to the times at which mixer power is switched onloff and shall be maintained within + 2 s.

49、 With the mixer in the operating condition: a) place the water and cement into the bowl taking care to avoid loss of water or cement; complete the addition within 10 s; b) immediately start the mixer at low speed whilst starting the timing of the mixing stages. In addition, record the time to the nearest minute as zero time; NOTE 1 Zero time is the point from which the initial (see 6.2) and final (see 6.3) setting times are calculated. c) Stop the mixer after 90 s for 30 s during which remove by means of a suitable rubber or plastics scraper all the paste adhering to the wall