EN 1353-1996 en Determination of Moisture Content of Autoclaved Aerated Concrete《高压多孔混凝土的水含量测定》.pdf

1、STD-BSI BS EN 1353-ENGL 1997 m 1b2Lfbb Ob47021 183 BRITISH STANDARD Determination of moisture content of autoclaved aerated concrete The European Stan b) Cdiipers, capable of reading the dimensions of test specimens to an accuracy of 0,l mm; c) A balance, capable of determining the mass of test spec

2、imens to an accuracy of 0,1%, d) A ventilated drying oven, capable of maintaining a temperature of (105 f 5) “C. Page 3 EN 1353 : 1996 5 %st specimens 6.1 Sample The sample for the prepdon of the test specimens (i.e. normally at least one Prefabricated component) shall be taken in such a manner that

3、 it is represenaive of the product to be investigated. 6.2 Shape and size of test specimens The test specimens shall be prisms, cubes, or cylinders with a minimum dimension of at least 50 mm and a volume of at least 0,5 X 6.3 Number of test specimens A test set shall consist of at least three test s

4、pecimens. Whenever possible, one test specimen shall be prepared from the upper third of the component, one from the middle and one from the lower third, in the direction of rise of the mass during manufacture (see fim 1). The position of the test specimens in the material, relative to the rise of t

5、he mass, shall be shown by the numbering. Alternatively, one single test specimen is sufficient, if it extens over the full height of the rise of the mass and if its volume is at least 1,5 X m3. The moisture content determined on such a test Specimen is equivalent to the mean value of three individu

6、al test specimens according to 6.2. 6.4 Preparation of test specimens The test specimens shall be cut by means of a saw (or by means of a core drill in the case of cylindrical test specimens) taking care that the moisture content is influenced as little as possible (e.g. no water cooling of the saw

7、or core drill). Au surfaces shall be clean and plane enough to enable determination of the volume with sufficient accuracy (see 6.2). If the inclusion of reinforcement cannot be avoided, the mass and the volume of the reinforcement, including antixorrosion coating, shall be considered in the calcula

8、tion of the moisture content. NOTE. Preferably, test specimens should not contain any reinforcement. m3 each. ) A European Standard for prefabricated reinforced components of autoclaved aerated concrete is in preparation at CEN. O BSI 1997 STD-BSI BS EN 1353-ENGL 1797 I1b24bb9 b47028 538 I Page 4 EN

9、 1363 : 1996 Direction of rise - Zone 3 Zone 1 Zone 2 4- 1 w13 w13 w13 r - Width W e Figure 1. Sampling scheme 6 Testing procedure 6.1 Determination of the mass of test specimens ;n the moist state i. I mediately after the prepdon of the test specimens, before any loss of moisture has occurred, the

10、mass mh, of the individual test specimens in the moist state shall be determined to an accuracy of 0,196 6.2 Determination of the volume of test specimens The volume of the individual test specimens is cal- Mm their measured dimensions. The error in determining the volume V shal not exceed 1 % 6.3 D

11、rying of test specimens ARer these measurements, the test specimens shall be placed in a ventilated rying oven at (105 f 5) C until constant mass is attained. The dry mass mw of the individual test specimens shall be determined immeiately after removal from the drymg oven. The error in determining t

12、he mass shall not exceed 0,1%. The mass of the test specimen is considered constant if ar 24 h of further drying it has not changed by more than 0,2 3. 7 Llest results The moisture content, related to mass, is calculated according to equation (1): where pm mhm is the mass of the test specimen in the

13、 moist mw is the mass of the dried test specimen, in The moisture content, related to mass, pm, of each is the moisture content, related to mass, in per cent; -, in grams; grams. individual t mhm is the mass of the test specimen in the moist state, in grams; mw is the mass of the dried test specimen

14、, in grams; V is the volume of the test specimen, in cubic miimetres. The moisture content related to volume, ,uln of each individual test specimen and the mean value shail be expressed to the nearest 1 kghn3. 8 %st report The test report shall include the foliowing: a) identificaton of the product;

15、 b) date of manufacture or other code; c) place and date of testing, testing institute, and person responsible for testing d) number and date of issue of this European e) shape, size, and relative position of test specimens; f) moisture content ,um andlor pv of each individual test specimen and mean

16、 value; g) (if unusuai) observations on the appearance of test specimens; h) (if appropriate) deviations from the standard method of testing; j) a declaration that the testing has been carried out in accordance with this European Stanch except as detailed in Sh). Standard; O BSI 1997 STD-BSI BS EN 1

17、353-ENGL 1777 m lb24bb7 b47029 474 BS EN 1353 : 1997 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the intedonal level. It is incorpo

18、rated by Royal Charter. Contract requirements A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Revisions Briish Standards are updated by amendment or revkion. Users of British Standard

19、s should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the qualily of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the responsible

20、 technical committee, the identity of which can be found on the inside front cover. Tel: 0181 996 9000; Fax: 0181 996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for

21、 all BSI, intemational and foreign standards publications should be addressed to Customer Services, Sales Dement at Chiswick Tel: 0181 996 7000; Fax: 0181 996 7001. in response to orders for intemalional stcuidards, it is BSI policy to supply the BSI implementation of those that have been published

22、as British standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and intemational standards through its Library, the Standardline Database, the BSI Information Technology Service (BITS) and its Technical Help to Exporters Servi

23、ce. Contact the Information Depariment at Chiswick Tel: 0181 996 7111; Fax: 0181 996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Customer Service

24、s, Membership at Chiswick Tel: 0181 996 7002; Fax: 0181 996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the intedonal standadhation bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract

25、 may be reproduced, stored in a retrieval system or transmitted in any form or by any means - electronic, photocopying, recording or otherwise - without prior written permission from BSI. This does not preclude the free use, in the com of implementing the standard, of necessary details such as symbo

26、ls, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained If permission is granted, the terms may include royalty payments or a licensing agreement DeW and &ce can be obtained from the Copynght Manager, BSI, 389 Chiswick High Road, London W4 4AL