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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 480-5 : 1997 The Eu
2、ropean Standard EN 480-5 : 1996 has the status of a British Standard ICS 91.100.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Admixtures for concrete, mortar and grout Test methods Part 5. Determination of capillary absorption Licensed Copy: sheffieldun sheffieldun, na, S
3、at Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 480-5 : 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 June 1997 BSI
4、1997 The following BSI references relate to the work on this standard: Committee reference B/517/3 Draft for comment 91/13170 DC ISBN 0 580 27438 1 Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard
5、was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/3, Admixtures, upon which the following bodies were represented: Brick Development Association British Aggregate Construction Materials Industries British Cement Association British Ceramic Research Ltd. British Precast Conc
6、rete Federation Ltd. British Ready Mixed Concrete Association Building Employers Confederation Cement Admixtures Association Concrete Society Department of the Environment Department of the Environment (Building Research Establishment) Institute of Concrete Technology Institution of Civil Engineers
7、Institution of Structural Engineers Mortar Producers Association Limited Society of Chemical Industry Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 480-5 : 1997 BSI 1997i Contents Page Committees responsibleInside front cover Nationa
8、l forewordii Foreword2 Text of EN 480-53 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1997 BS EN 480-5 : 1997 National foreword This Part of BS EN 480 has been prepared by Subcommittee B/517/3 and is the English language version of
9、 EN 480-5 : 1996 Admixtures for concrete, mortar and grout Test methods Part 5: Determination of capillary absorption, published by the European Committee for Standardization (CEN). This standard is part of a package of standards comprising BS EN 480 : Parts 1, 2, 4, 5, 6, 8 10, 11 and 12, BS EN 934
10、 : Parts 2 and 6. When all the standards in this package have been published BS 5075 : Parts 1, 2 and 3 will be amended by deleting clauses which conflict with standards in the package. This standard has been prepared to provide a method to test water resisting concrete admixtures for conformity to
11、EN 934-2. NOTE. Water resisting admixtures may be hydrophobic or pore blocking materials or a combination of both types of material. The standard permits the test mix to have the same w/c ratio or the same consistence as the control mix. Using test and control mixed with the same w/c ratio will show
12、 the hydrophobic and pore blocking capabilites of the admixture. If the test and control mixes have the same consistency the reduction in absorption may be due to the reduction in w/c ratio alone. Cross-reference Publication referred toCorresponding British Standard EN 196-1 : 1994BS EN 196 Methods
13、of testing cement Part 1 : 1995 Determination of strength EN 413-2 : 1994BS EN 413 Masonry cement Part 2 : 1995 Test methods Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4, an inside back cover and a back cover. Licensed
14、 Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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 Copyright reserved to CEN member
15、s Ref. No. EN 480-5 : 1996 E EUROPEAN STANDARDEN 480-5 NORME EUROPE ENNE EUROPA ISCHE NORM September 1996 ICS 91.100.10; 91.100.30 Descriptors: Construction materials, concrete, mortars, material, grouting, concrete admixtures, tests, water absorption tests, capillary English version Admixtures for
16、concrete, mortar and grout Test methods Part 5: Determination of capillary absorption Adjuvants pour be ton, mortier et coulis Me thodes dessai Partie 5: De termination de labsorption capillaire Zusatzmittel fu r Beton, Mo rtel und Einpremo rtel Pru fverfahren Teil 5: Bestimmung der kapillaren Wasse
17、raufnahme This European Standard was approved by CEN on 1996-08-04. 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 bibliographica
18、l references concerning 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 me
19、mber 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, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sw
20、eden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 480-5 : 1996 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 104, Concrete (performance, production, pla
21、cing and compliance criteria), 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 endorsement, at the latest by March 1997, and conflicting national standards shall be withdrawn at the lat
22、est by March 1997. This standard is applicable together with the other standards of the EN 480 series for testing admixtures according to the EN 934 series. The EN 480 series consists of the following Parts: Part 1:Reference concrete and reference motar for testing Part 2:Determination of setting ti
23、me Part 4:Determination of bleeding of concrete Part 5:Determination of capillary absorption Part 6:Infrared analysis Part 8:Determination of the conventional dry material content Part 10:Determination of water soluble chloride content Part 11:Determination of air void characteristics in hardened co
24、ncrete Part 12:Determination of the alkali content of admixtures According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ire
25、land, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom Contents Page 1Scope3 2Normative references3 3Principle3 4Apparatus3 5Reference mortar3 6Test Specimens3 7Procedure3 8Results4 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT
26、+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 480-5 : 1996 BSI 1997 1)The use of constant consistency or constant water/cement ratio is specified in the requirement or agreed between the purchaser and supplier. 1 Scope This European Standard describes a test method for the determination of the e
27、ffect of admixtures on the capillary absorption of mortar. 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 hereaft
28、er. For dated references, 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. EN 196-1Methods of testing cement Par
29、t 1: Determination of strength EN 413-2Masonry cement Part 2: Test methods EN 480-1Admixtures for concrete, mortar and grout Test methods Part 1: Reference concrete and reference mortar for testing 3 Principle The test consists of measuring the mass of water absorbed by a mortar test sample under sp
30、ecified conditions. 4 Apparatus a) Balance, with an accuracy of 0,1 g; b) Receptacle, 200 mm high, large enough to contain 12 prismatic specimens, with a flat base and a cover; c) A means, of allowing a constant level of water to be maintained in the receptacle; d) Equipment, for the preparation of
31、(40 3 40 3 160) mm prisms made of mortar that conforms to EN 196-1; e) An enclosure, controlled at (202) C and (655) % relative humidity. 5 Reference mortar The reference mortar shall be as specified in EN 480-1. The test mix shall either have the same consistency as the control mix as described in
32、EN 480-1 or the test mix shall have the same water/cement ratio as the control mix 1). The water content of the admixture shall be taken into account when calculating the required water content of the test mix. 6 Test Specimens 6.1 Preparation of test specimens Materials for the control mix and test
33、 mix, and moulds for the test specimens, shall be conditioned for at least 24 h before use. Conditioning shall be by placing in an enclosure maintained at (202) C and (655) % relative humidity. Mixing of the mortar shall be as described in EN 480-1. Mortar specimens (40 3 40 3 160) mm shall be prepa
34、red as described in EN 196- 1 except that the moulds shall not be oiled. In case of equal w/c ratio the water content of the admixture shall be taken into account when calculating the required water content of the mortar. In case the test mix shall have the same consistence as the control mix this s
35、hall be measured by using the workability meter in accordance with EN 413-2. 6.2 Number of specimens Twelve specimens shall be tested as follows: six specimens for control mix; six specimens for test mix. 6.3 Curing of specimens On both the control mix and the test mix, two series of measurements of
36、 capillary absorption shall be carried out. The first series shall be performed on three specimens of test mix and three specimens of control mix after 7 days curing. The second series shall be carried out on the other specimens after 90 days curing. The specimens shall be demoulded after 24 h and f
37、urther cured in the enclosure (see 4e) until 7 days and 90 days old respectively. 7 Procedure 7.1 Placing of specimens The specimens shall be weighed (Mo) in the enclosure (see 4e) when 7 days or 90 days old as appropriate and placed vertically in a receptacle (see 4b) containing water at a constant
38、 level. The samples shall rest on rods or pins to allow free access of water to the base. The water level shall be maintained at (31) mm above the base of the specimen. Avoid contact between the specimens. Immediately after placing the specimens in position, put the cover on the receptacle. Licensed
39、 Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 480-5 : 1996 BSI 1997 7.2 Weighing At the time specified in 7.3, each specimen shall be removed from the receptacle, wiped lightly with dry paper or cloth in order to remove any surplus water
40、, weighed (Mj) and then again put vertically in the receptacle. The other specimens in each series shall be treated individually in the same way. 7.3 Test schedule a) Specimens cured for 7 days under the conditions specified in 6.3 shall then be tested after 1 day and after 7 days in contact with wa
41、ter as described in 7.2. b) Specimens cured for 90 days under the conditions specified in 6.3 shall then be tested after 1 day, 7 days and 28 days in contact with water as described in 7.2. 8 Results The results obtained by testing three specimens at each date, for each type of mortar (control mix a
42、nd test mix) are expressed as the mean of the three measured values. Capillary absorption (CA) after the required time is given in g/mm2by CA=(1) Mj2 Mo 1600 where Mois the mass of the specimen after curing for 7 days or 90 days, in grams; Mjis the mass of the specimen after the required absorption
43、time, in grams. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 1997 BS EN 480-5 : 1997 List of references See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:25:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
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