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1、BRITISH STANDARD BS EN 1353:1997 Determination of moisture content of autoclaved aerated concrete The European Standard EN 1353:1996 has the status of a British Standard ICS 91.100.30 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 135
2、3:1997 This 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 October 1997 BSI 10-1999 The following BSI references relate to the work on this standar
3、d: Committee reference B/523 Draft for comment 93/110409 DC ISBN 0 580 27468 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee B/523, Prefabricated concrete and lightweight aggregate concrete with open structure, upon whi
4、ch the following bodies were represented: Aggregate Concrete Block Association Autoclaved Aerated Concrete Association British Masonry Society British Precast Concrete Federation Ltd. Department of the Environment (Building Research Establishment) Institution of Structural Engineers Local Authority
5、Organizations Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1353:1997 BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of
6、EN 13533 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1353:1997 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of Technical Committee B/523 and is the English language version of EN 1353
7、:1996 Determination of moisture content of autoclaved aerated concrete, published by the European Committee for Standardization (CEN). 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.
8、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, pages i and ii, the EN title page, pages 2 to 5 and a back cover. This standard has been updated (see copyright date) and may h
9、ave had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1353 December 1996 ICS 91.100.30 D
10、escriptors: Concrete, cellular concrete, tests, determination, rates: per unit time, humidity, computation, weight losses, drying English version Determination of moisture content of autoclaved aerated concrete Dtermination du taux dhumidit du bton cellulaire autoclav Bestimmung des Feuchtegehalts v
11、on dampfgehrtetem Porenbeton This European Standard was approved by CEN on 1996-11-30. 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
12、 and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsi
13、bility 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 standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
14、 Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 1353:1996 E Licensed Copy: sheffieldun
15、sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1353:1996 BSI 10-1999 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 177, Prefabricated reinforced components of autoclaved aerated concrete or lightweight aggregate concrete with op
16、en structure, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsment, at the latest by June 1997, and conflicting national standards shall be withdrawn at the latest by June 1997. I
17、n order to meet the performance requirements as laid down in the product standard for prefabricated components of autoclaved aerated concrete, a number of standardized test methods are necessary. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
18、 countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom Contents Page Foreword2 1Scope3 2Normative references3 3Principle3 4App
19、aratus3 5Test specimens3 5.1Sample3 5.2Shape and size of test specimens3 5.3Number of test specimens3 5.4Preparation of test specimens3 6Testing procedure3 6.1Determination of the mass of test specimens in the moist state3 6.2Determination of the volume of test specimens4 6.3Drying of test specimens
20、4 7Test results4 8Test report4 Figure 1 Sampling Scheme4 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1353:1996 BSI 10-19993 1 Scope This European Standard specifies a method of determining the moisture content of prefabricated compone
21、nts of autoclaved aerated concrete (AAC)1). 2 Normative references This European Standard incorporates 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 r
22、eferences, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.1) 3 Principle Prismatic test specimens (prisms, cubes
23、, or cylinders) are taken from prefabricated components making provision that the moisture content remains unchanged until the first weighing. The mass of the test specimens is determined in the moist state and after drying to constant mass at (105 5) C. Furthermore, the volume of the test specimens
24、 is determined from the measured dimensions. The moisture content is calculated from the mass loss through drying, related to the mass or to the volume of the dried test specimens, respectively. 4 Apparatus a) Any saw, suitable for cutting reinforced AAC components without disturbing the moisture co
25、ntent of the AAC; b) Callipers, capable of reading the dimensions of test specimens to an accuracy of 0,1 mm; c) A balance, capable of determining the mass of test specimens to an accuracy of 0,1 %; d) A ventilated drying oven, capable of maintaining a temperature of (105 5) C. 5 Test specimens 5.1
26、Sample The sample for the preparation of the test specimens (i.e. normally at least one prefabricated component) shall be taken in such a manner that it is representative of the product to be investigated. 5.2 Shape and size of test specimens The test specimens shall be prisms, cubes, or cylinders w
27、ith a minimum dimension of at least 50 mm and a volume of at least 0,5 103 m3 each. 5.3 Number of test specimens A test set shall consist of at least three test specimens. Whenever possible, one test specimen shall be prepared from the upper third of the component, one from the middle and one from t
28、he lower third, in the direction of rise of the mass during manufacture (see Figure 1). The position of the test specimens in the material, relative to the rise of the mass, shall be shown by the numbering. Alternatively, one single test specimen is sufficient, if it extends over the full height of
29、the rise of the mass and if its volume is at least 1,5 103 m3. The moisture content determined on such a test specimen is equivalent to the mean value of three individual test specimens according to 5.2. 5.4 Preparation of test specimens The test specimens shall be cut by means of a saw (or by means
30、 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 or core drill). All surfaces shall be clean and plane enough to enable determination of the volume with sufficient accuracy (see 6.2
31、). If the inclusion of reinforcement cannot be avoided, the mass and the volume of the reinforcement, including anti-corrosion coating, shall be considered in the calculation of the moisture content. NOTEPreferably, test specimens should not contain any reinforcement. 6 Testing procedure 6.1 Determi
32、nation of the mass of test specimens in the moist state Immediately after the preparation of the test specimens, before any loss of moisture has occurred, the mass mhum of the individual test specimens in the moist state shall be determined to an accuracy of 0,1 %. 1) A European Standard for prefabr
33、icated reinforced components of autoclaved aerated concrete is in preparation at CEN. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1353:1996 4 BSI 10-1999 6.2 Determination of the volume of test specimens The volume of the individual t
34、est specimens is calculated from their measured dimensions. The error in determining the volume V shall not exceed 1 %. 6.3 Drying of test specimens After these measurements, the test specimens shall be placed in a ventilated drying oven at (105 5) C until constant mass is attained. The dry mass mdr
35、y of the individual test specimens shall be determined immediately after removal from the drying oven. The error in determining the mass shall not exceed 0,1 %. The mass of the test specimen is considered constant if after 24 h of further drying it has not changed by more than 0,2 %. 7 Test results
36、The moisture content, related to mass, is calculated according to equation (1): The moisture content, related to mass, m, of each individual test specimen and the mean value shall be expressed to the nearest 0,1%. The moisture content, related to volume, is calculated according to equation (2): The
37、moisture content related to volume, V, of each individual test specimen and the mean value shall be expressed to the nearest 1 kg/m3. 8 Test report The test report shall include the following: a) identification of the product; b) date of manufacture or other code; c) place and date of testing, testi
38、ng institute, and person responsible for testing; d) number and date of issue of this European Standard; e) shape, size, and relative position of test specimens; f) moisture content m and/or V of each individual test specimen and mean value; g) (if unusual) observations on the appearance of test spe
39、cimens; Figure 1 Sampling scheme (1) where mis the moisture content, related to mass, in percent; mhumis the mass of the test specimen in the moist state, in grams; mdryis the mass of the dried test specimen, in grams. m100 mhummdry mdry - -= (2) where Vis the moisture content, related to volume, in
40、 kilograms per cubic metre; mhumis the mass of the test specimen in the moist state, in grams; mdryis the mass of the dried test specimen, in grams. Vis the volume of the test specimen, in cubic millimetres. V mhummdry V - -106= Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:09:00 GMT+00:
41、00 2006, Uncontrolled Copy, (c) BSI EN 1353:1996 BSI 10-19995 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 Standard, except as detailed in 8 h). Licensed Copy: sheffieldun sheffieldun, na,
42、Mon Oct 30 09:09:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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 intern
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