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 91.100.30BSEN1353:1997 This British Standard, having been prepared under the directionof the Sector Board forBuilding and Civi
2、l Engineering, was published underthe authorityofthe Standards Boardand comes intoeffect on 15October1997 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference B/523 Draft for comment 93/110409 DC ISBN 0 580 27468 3 Committees responsible for this British
3、Standard The preparation of this British Standard was entrusted to Technical Committee B/523, Prefabricated concrete and lightweight aggregate concrete with open structure, upon which the following bodies were represented: Aggregate Concrete Block Association Autoclaved Aerated Concrete Association
4、British Masonry Society British Precast Concrete Federation Ltd. Department of the Environment (Building Research Establishment) Institution of Structural Engineers Local Authority Organizations Amendments issued since publication Amd. No. Date CommentsBSEN1353:1997 BSI 10-1999 i Contents Page Commi
5、ttees responsible Inside front cover National foreword ii Foreword 2 Text of EN 1353 3BSEN1353:1997 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 EN1353:1996 Determination of moisture c
6、ontent 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. Compliance with a British Standar
7、d 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, theEN title page, pages 2 to 5 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. T
8、his will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1353 December 1996 ICS 91.100.30 Descriptors: Concrete, cellular concrete, tests, determination, rates: per unit time, humidity, computation, weight losses, drying English vers
9、ion Determination of moisture content of autoclaved aeratedconcrete Dtermination du taux dhumidit du bton cellulaire autoclav Bestimmung des Feuchtegehalts von dampfgehrtetem Porenbeton This European Standard was approved by CEN on 1996-11-30. CEN members are bound to comply with the CEN/CENELEC Int
10、ernal 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 concerning such national standards may be obtained on application to the Central Secretariat or to any CEN memb
11、er. The European Standards exist 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
12、are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr
13、 Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 1353:1996 EEN1353:1996 BSI 10-1999 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 177, Prefabricated reinforced components of autoclaved aerated con
14、crete or lightweight aggregate concrete with open 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 s
15、hall be withdrawn at the latest by June 1997. In 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 na
16、tional standards organizations of the following 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 theUnited Kingdom Contents Page Foreword 2
17、1 Scope 3 2 Normative references 3 3 Principle 3 4 Apparatus 3 5 Test specimens 3 5.1 Sample 3 5.2 Shape and size of test specimens 3 5.3 Number of test specimens 3 5.4 Preparation of test specimens 3 6 Testing procedure 3 6.1 Determination of the mass of test specimensinthe moist state 3 6.2 Determ
18、ination of the volume of testspecimens 4 6.3 Drying of test specimens 4 7 Test results 4 8 Test report 4 Figure 1 Sampling Scheme 4EN1353:1996 BSI 10-1999 3 1 Scope This European Standard specifies a method of determining the moisture content of prefabricated components of autoclaved aerated concret
19、e (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 references, subsequent amendment
20、s 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, or cylinders) are taken from
21、 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 is determined from the measur
22、ed 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 content of the AAC; b) Callipers
23、, 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 Sample The sample for the prepa
24、ration 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 with a minimum dimension of at l
25、east50mm and a volume of at least 0,5 10 3m 3each. 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 the lower third, in the direction
26、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 the rise of the mass and if its v
27、olume is at least 1,5 10 3m 3 . 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 of a core drill in the case of
28、 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). If the inclusion of reinforc
29、ement 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 Determination of the mass of test spec
30、imens in the moist state Immediately after the preparation of the test specimens, before any loss of moisture has occurred, the mass m humof the individual test specimens in the moist state shall be determined to an accuracy of 0,1%. 1) A European Standard for prefabricated reinforced components of
31、autoclaved aerated concrete is in preparation at CEN.EN1353:1996 4 BSI 10-1999 6.2 Determination of the volume of test specimens The volume of the individual test specimens is calculated from their measured dimensions. The error in determining the volume V shall not exceed1%. 6.3 Drying of test spec
32、imens 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 m dryof the individual test specimens shall be determined immediately after removal from the drying oven. The error in determining the mass shall
33、not exceed0,1%. The mass of the test specimen is considered constant if after 24h of further drying it has not changed by more than 0,2%. 7 Test results The moisture content, related to mass, is calculated according to equation (1): The moisture content, related to mass, m , of each individual test
34、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 moisture content related to volume, V , of each individual test specimen and the mean value shall be expressed to the nearest 1 kg/m 3 . 8 Test re
35、port 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, testing institute, and person responsible for testing; d) number and date of issue of this EuropeanStandard; e) shape, size, and relative position o
36、f test specimens; f) moisture content mand/or Vof each individual test specimen and mean value; g) (if unusual) observations on the appearance of test specimens; Figure 1 Sampling scheme (1) where m is the moisture content, related tomass, in percent; m hum is the mass of the test specimen in the mo
37、ist state, in grams; m dry is the mass of the dried test specimen, in grams. m 100 m hum m dry m dry - = (2) where V is the moisture content, related to volume, in kilograms per cubic metre; m hum is the mass of the test specimen in the moist state, in grams; m dry is the mass of the dried test spec
38、imen, in grams. V is the volume of the test specimen, in cubic millimetres. V m hum m dry V -10 6 =EN1353:1996 BSI 10-1999 5 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
39、 detailed in 8 h).BS EN 1353:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charte
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