BS EN 1170-6-1998 Precast concrete products - Test method for glass-fibre reinforced cement - Determination of the absorption of water by immersion and determination of the dry den.pdf

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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1170-6 : 1998 The E

2、uropean Standard EN 1170-6 : 1997 has the status of a British Standard ICS 91.100.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Precast concrete products Test method for glass-fibre reinforced cement Part 6. Determination of the absorption of water by immersion and determ

3、ination of the dry densityThis British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 March 1998 BSI 1998 ISBN 0 580 29201 0 BS EN 1170-6 : 1998 Amendments

4、 issued since publication Amd. No. Date Text affected National foreword This British Standard is the English language version of EN 1170-6 : 1997. The UK participation in its preparation was entrusted to Technical Committee B/524, Precast concrete products, which has the responsibility to: aid enqui

5、rers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on t

6、his committee can be obtained on request to its secretary. The UK voted against this standard at the CEN Formal Vote stage but the analysis of voting, in accordance with CEN/CENELEC Internal Regulations Part 2 : Common rules for standards work, resulted in a positive vote. In consequence, the docume

7、nt was accepted as a European Standard. This standard, together with BS EN 1170 : Parts 1 to 5 and 7 supersedes BS 6432 : 1984 which is withdrawn. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standa

8、rds Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fro

9、nt cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form a

10、nd by any means reserved worldwide for CEN national Members. Ref. No. EN 1170-6 : 1997 E EUROPEAN STANDARD EN 1170-6 NORME EUROPE ENNE EUROPA ISCHE NORM November 1997 ICS 91.100.30 Descriptors: Concrete products, prefabricated elements, composite materials, cements, glass, verification, conformity t

11、ests, water absorption tests, measurements, density (mass/volume), immersion tests English version Precast concrete products Test method for glass-fibre reinforced cement Part 6: Determination of the absorption of water by immersion and determination of the dry density Produits pre fabrique se nb e

12、ton Me thode dessai des composites ciment-verre Partie 6: De termination de labsorption deau par immersion et de la masse volumique se che Vorgefertigte Betonerzeugnisse Pru fverfahren fu r Glasfaserbeton Teil 6: Bestimmung der Wasseraufnahme mittels Tauchverfahren und der Trockenrohdichte This Euro

13、pean Standard was approved by CEN on 29 October 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references c

14、oncerning 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 in any other language made by translation under the responsibility of a CEN member into its

15、own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,

16、Sweden, Switzerland and United Kingdom.Page 2 EN 1170-6 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 229, Precast concrete products, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard,

17、either by publication of an identical text or by endorsement, at the latest by May 1998, and conflicting national standards shall be withdrawn at the latest by May 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to im

18、plement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Symbols and abbreviation 3 2.1 Symb

19、ols 3 2.2 Abbreviation 3 3 Apparatus 3 4 Procedure 4 4.1 Test pieces 4 4.2 Test method 4 5 Expression of results 4 5.1 Water absorption by immersion 4 5.2 Dry density 4 6 Interpreting the test 4 7 Test report sheet 4 Annex A (informative) Example of test report sheet 5Page 3 EN 1170-6 : 1997 BSI 199

20、8 Dimensions in millimetres Figure 1. Example of a device for positioning the test pieces 1 Scope This European Standard specifies a test method for determining the dry density and water absorption of a given GRC composition. 2 Symbols and abbreviation 2.1 Symbols m d mass of a test piece after dryi

21、ng, dry mass, in grams; m wj mass of a test piece after immersion for j days, wet mass, in grams; V volume of a test piece, in cm 3 ; g water absorption by immersion, in percentage by mass; r d dry density, in kg/m 3 . 2.2 Abbreviation GRC Glass-fibre reinforced cement. 3 Apparatus The apparatus com

22、prises: a scale, with a measuring range 0 kg to 2 kg, accurate to 0,1 g; a ventilated drying oven, adjusted to (105 5)8C; a flat board, made of smooth, easily cleaned material, approximately (5003 800) mm; a rule, accurate to 0,5 mm; a calliper, accurate to 0,1 mm; a flat bottomed tank, filled with

23、water maintained at (20 2)8C, approximately (3003 2003 100) mm, equipped with a device allowing the positioning of the samples in conformity with 4.2, for example, non-corrodible rack-type comb as shown in figure 1.Page 4 EN 1170-6 : 1997 BSI 1998 4 Procedure 4.1 Test pieces On the flat board, make

24、a sample panel with no facing layer (i.e. made entirely of GRC) under the same conditions as the actual production it represents: spray or premix. After 24 h, demould and store the sample panel until the age of 6 days, under the same conditions as for the actual production it represents. Cut out by

25、sawing, at (50 ) mm from the edges, four 0 +1 test pieces from the positions illustrated in figure 2. NOTE. The test pieces may also be cut out on the day of demoulding. Figure 2. Position and identification of test pieces Dimensions of the test pieces: width: (50 2) mm; length: (225 2) mm; When the

26、 four test pieces have been aged for 6 days, store them in the test room at a temperature of (20 3)8C for approximately 24 h so that they have been aged for 7 days at the time of the tests. 4.2 Test method Measure the dimensions of each sample to the nearest millimetre and calculate the volume, expr

27、essed in cm 3 , for each sample. NOTE. It is also possible to determine the volume by the hydrostatic weighing method. Place the four test pieces in the flat bottomed tank filled with water at (20 2)8C. The test pieces are held in place vertically by the combs and resting on one of their lengthwise

28、edges. The depth of covering by water shall be (20 ) mm. 0 +4 The duration of immersion, depending on the GRC composition, shall be: 24 h for compositions with no polymer content; 7 days, with an intermediate measurement at 24 h. After removal from the water and before weighing, wipe the test pieces

29、 with a damp cloth to remove any surface water. Weigh the test pieces: m w1 is the mass after immersion for 24 h, in grams; m w7 is the mass after immersion for 7 days, in grams. Then place the test pieces in the ventilated drying oven until they reach constant mass m d , i.e. when the difference be

30、tween two weighing results 24 h apart is less than 0,1 %. 5 Expression of results 5.1 Water absorption by immersion The water absorption by immersion, g, expressed as a percentage by mass, is determined by the equation: g = 3 100 m w 2 m d m d For formulations with polymer content g is calculated at

31、 24 h with m w1 and g at 7 days with m w7 . 5.2 Dry density The dry density r d , expressed in kg/m 3 , is determined by the following equation: r d = m d 3 10 3 V3 10 6 6 Interpreting the test The results depend on the characteristics of the GRC composition (granulometry of the sand, polymer conten

32、t, etc.) and its workmanship (compaction). 7 Test report sheet The test report sheet shall comprise the following information: the date of test; the identification of the manufacturer; the dimensions of test pieces; the intermediate results: wet mass, dry mass; the results: water absorption at 24 h,

33、 at 7 days in the case of compositions with polymer content, dry density. NOTE. An example of the test report sheet is given in annex A.Page 5 EN 1170-6 : 1997 BSI 1998 Annex A (informative) Example of test report sheet ORDER and marking of parts PRODUCTION TESTS TESTS performed on this day of produ

34、ction *) of : by : CONSISTENCY FIBRE CONTENT BENDING STRENGTH WATER ABSORPTION BY IMMERSION AND DENSITY (Solid GRC ONLY) Marking of test pieces Dimensions Volume Wet mass Dry mass Water absorption Dry density r d V (g) (g) at 24 h at 7 days *) (g/cm 3 or kg/m 3 ) (mm) (cm 3 ) m w1 m w7 *) m d 3 100

35、m w1 2 m d m d 3 100 m w7 2 m d m d m d V T 1 . 3 .3 . . T 2 . 3 .3 . . B 1 . 3 .3 . . B 2 . 3 .3 . . Mean . % . % kg/m 3 *) Delete where not applicable. *) Water absorption at 7 days only for composition with polymer content. NOTE. It is possible to determine the volume by the hydrostatic weighing

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