1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1170-3 : 1998 The E
2、uropean Standard EN 1170-3 : 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 3. Measuring the fibre content of sprayed GRCThis British Standard,
3、 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 29183 9 BS EN 1170-3 : 1998 Amendments issued since publication Amd. No. Date Text aff
4、ected National foreword This British Standard is the English language version of EN 1170-3 : 1997. The UK participation in its preparation was entrusted to Technical Committee B/524, Precast concrete products, which has the responsibility to: aid enquirers to understand the text; present to the resp
5、onsible 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. The UK voted against this standard at the CEN Formal Vote stage but the analysis of voti
6、ng, in accordance with CEN/CENELEC Internal Regulations Part 2 : Common rules for standards work, resulted in a positive vote. In consequence, the document was accepted as a European Standard. This standard, together with BS EN 1170 : Parts 1, 2 and 4 to 7, supersedes BS 6432 : 1984 which is withdra
7、wn. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled Int
8、ernational 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 front cover, an inside front cover, the EN titl
9、e page, pages 2 to 4, an inside back cover 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 and by any means reserv
10、ed worldwide for CEN national Members. Ref. No. EN 1170-3 : 1997 E EUROPEAN STANDARD EN 1170-3 NORME EUROPE ENNE EUROPA ISCHE NORM November 1997 ICS 91.100.30 Descriptors: Concrete products, prefabricated elements, composite materials, cements, glass, verification, conformity tests, fibres, rates: p
11、er unit time, computation English version Precast concrete products Test method for glass-fibre reinforced cement Part 3: Measuring the fibre content of sprayed GRC Produits pre fabrique se nb e ton Me thode dessai des composites ciment-verre Partie 3: Mesure de la teneur en fibres des CCV re alise
12、s par projection Vorgefertigte Betonerzeugnisse Pru fverfahren fu r Glasfaserbeton Teil 3: Bestimung des Fasergehaltes in frischem GFB beim Spritzverfahren This European Standard was approved by CEN on 29 October 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s
13、tipulate the conditions for giving this European Standard the status of a 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 Standar
14、d 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 own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standar
15、ds bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1170-3 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical
16、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, either by publication of an identical text or by endorsement, at the latest by May 1998, and conflicting national standards shall be wi
17、thdrawn at the latest by May 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, L
18、uxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Symbols and abbreviation 3 3.1 Symbols 3 3.2 Abbreviation 3 4 Apparatus 3 5 Procedure 3 6 Calculations 3 7 Interpreting the test 3 8 Test report
19、sheet 3 Annex A (informative) Calculation of the equipment outputs 4Page 3 EN 1170-3 : 1997 BSI 1998 1 Scope This European Standard specifies a test method for verifying, during production, the fibre content of sprayed glass-fibre reinforced cement. 2 Normative references This European Standard inco
20、rporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this Eur
21、opean Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 1170-2 Precast concrete products Test method for glass-fibre reinforced cement Part 2: Measuring the fibre content in fresh GRC Wash out test met
22、hod 3 Symbols and abbreviation 3.1 Symbols G c fibre content, in percentage by mass; m mass, in grams; t time, in seconds. 3.2 Abbreviation GRC glass-fibre reinforced cement. 4 Apparatus The apparatus comprises: 1 bucket, with a capacity of approximately 10 l; 1 scale, with a measuring range from 0
23、kg to 20 kg, accurate to 10 g; 1 stopwatch, accurate to 1 s; 1 container for waste, with a capacity of approximately 5 l. 5 Procedure The test shall be carried out under the same conditions as actual production. Weigh the empty bucket, i.e. m 1 (in grams). Weigh the glass-fibre roll, i.e. m 2 (in gr
24、ams). Start the pump and spray the matrix (without fibres) into the waste container for a brief moment. Start the cutter and the stopwatch and spray (matrix and fibres) into the bucket for a time t expressed in s, of not less than 30 s, measured with an accuracy of 1 s. Direct the spray to the waste
25、 bucket and stop the cutter and matrix pump. Weigh the bucket filled with fibres and matrix, i.e. m 3 (in grams). Weigh the glass-fibre roll, i.e. m 4 (in grams). Calculate the fibre content as described in clause 6. Record the air pressure from the pump pressure gauge. NOTE. It is possible to carry
26、 out a separate output test (fibre only and matrix without fibres) in order to verify in a simplified way, the correct working of the equipment. 6 Calculations The fibre content G c , expressed as a percentage by weight, is determined by the following equation: G c = 3 100 m 2 2 m 4 m 3 2 m 1 7 Inte
27、rpreting the test The optimum value is determined by the specification and is a function of end use. If the result obtained does not comply with the specified value, carry out a second test to validate the information before making adjustments to the process. NOTE. The specified fibre content (mean
28、fibre content) is set by the manufacturer as a function of the variability of the production so that the glass-fibre content of the products is at least equal to the specified value (see annex A). 8 Test report sheet The test report sheet shall comprise the following elements: the date of test; the
29、identification of manufacture; the specified composition of the GRC; the intermediate results m 1 , m 2 , m 3 and m 4 ; the air pressure. NOTE. An example of the test report sheet is given in EN 1170-2.Page 4 EN 1170-3 : 1997 BSI 1998 Annex A (informative) Calculation of the equipment outputs The ra
30、tio of the fibre output to fibre and matrix outputs combined shall satisfy the following: $ specified fibre content$ specified value. 3 100 fibre output output (fibre + matrix) The actual equipment outputs, expressed in kilograms per minute, are obtained from the following equations: fibre output =
31、3 60 m 2 2 m 4 t3 10 3 matrix output = 3 60 (m 3 2 m 1 )2 (m 2 2 m 4 ) t3 10 3 output (fibre + matrix) = 3 60 m 3 2 m 1 t3 10 3 In order to facilitate self-inspection by the operators, it is useful to establish a guideline indicating: the specified fibre content and air pressure values; the acceptab
32、le fibre content variation (0,2 % being the generally accepted value).blankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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