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1、BRITISH STANDARD BS EN 480-13:2002 Admixtures for concrete, mortar and grout Test methods Part 13: Reference masonry mortar for testing mortar admixtures The European Standard EN 480-13:2002 has the status of a British Standard ICS 91.100.10 ? BS EN 480-13:2002 This British Standard, having been pre
2、pared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 11 October 2002 BSI 11 October 2002 ISBN 0 580 40534 6 National foreword This British Standard is the official Eng
3、lish language version of EN 480-13:2002. The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/3, Admixtures, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secr
4、etary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catal
5、ogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand t
6、he text; present to the responsible international/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. Summary of pages This document comprises a fro
7、nt cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISC
8、HE NORM EN 480-13 August 2002 ICS 91.100.10 English version Admixtures for concrete, mortar and grout - Test methods - Part 13: Reference masonry mortar for testing mortar admixtures Adjuvants pour bton, mortier et coulis - Mthodes dessai - Partie 13: Mortier maonner de rfrence pour les essais mens
9、sur les adjuvants de mortier Zusatzmittel fr Beton, Mrtel und Einpressmrtel - Prfverfahren - Teil 13: Referenz-Baumrtel fr die Prfung von Zusatzmitteln fr Mrtel This European Standard was approved by CEN on 10 May 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
10、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 Management Centre or to any CEN member. This European Standard
11、 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 Management Centre has the same status as the official versions. CEN members are the national standards
12、bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE F
13、R NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 480-13:2002 E EN 480-13:2002 (E) 2 Contents page Foreword3 1Scope 3 2Normative references 3 3Constituent materials
14、 4 3.1Cement4 3.2Sand 4 3.3Mixing water .4 4Reference masonry mortar.4 5Production of reference mortar with standard consistence .5 5.1Mix proportions5 5.2Mixing procedure.5 5.3Mortar for test after standing5 5.4Mortar for test after extended mixing 6 6Calculation of water reduction (air entraining/
15、plasticizing admixtures)6 7Test report 6 EN 480-13:2002 (E) 3 Foreword This document (EN 480-13:2002) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard,
16、 either by publication of an identical text or by endorsement, at the latest by February 2003, and conflicting national standards shall be withdrawn at the latest by February 2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
17、bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This document has been prepared by subcommittee 3 (SC
18、3) “Admixtures“ of TC 104. The present standard is applicable together with the standards of the series EN 480 and EN 934. 1 Scope This Standard specifies the constituent materials, the composition and the mixing procedure to produce a reference masonry mortar with a prescribed consistence for testi
19、ng mortar admixtures as defined in EN 934-3. It also describes the determination of the water reduction of the test mix compared to the control mix. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative reference
20、s 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 European Standard only when incorporated in it by amendment or revision. For undated references the lat
21、est edition of the publication referred to applies (including amendments). EN 196-1, Methods of testing cement Part 1: Determination of strength. EN 196-2, Methods of testing cement Part 2: Chemical analysis of cement. EN 196-6, Methods of testing cement Part 6: Determination of fineness. EN 197-1,
22、Cement - Part 1: Composition, specifications and conformity criteria for common cements. prEN 934-3, Admixtures for concrete, mortar and grout - Part 3: Admixtures for masonry mortar - Definitions, requirements and conformity. EN 1008, Mixing water for concrete Specification for sampling, testing an
23、d assessing the suitability of water, including water recovered from processes in the concrete industry, as mixing water for concrete. EN 1015-4, Methods of test for mortar for masonry Part 4: Determination of consistence of fresh mortar (by plunger penetration). EN 1015-7, Methods of test for morta
24、r for masonry Part 7: Determination of air content of fresh mortar. EN 480-13:2002 (E) 4 3 Constituent materials 3.1 Cement The reference masonry mortar shall be made with CEM I cement of strength class 42.5, conforming to EN 197-1. The cement used shall have a C3A content of 7 %11 % by mass calcula
25、ted from chemical analysis according to EN 196-2 and a specific surface area of (320400) m2/kg determined according to EN 196-6. 3.2 Sand A natural sand of normal density (relative density 2,52,8) shall be used. The size fractions of the sand shall comply with Table 1. The sand shall be used in an o
26、ven dry condition. Table 1 Sand for reference masonry mortar Aperture size (mm) Percentage by mass passing the test sieve 4,0100 2,094100 1,07787 0,56070 0,253949 0,1251323 0,06302 3.3 Mixing water Water according to EN 1008 shall be used as mixing water.1) 4 Reference masonry mortar Where specified
27、, tests on reference mortar are performed as comparative tests. That is comparing the performance of the reference mortar containing an admixture (test mix) with the performance of the reference mortar without an admixture (control mix). The air content of the control mix shall not exceed 5 % by vol
28、ume when determined in accordance with EN 1015-7 method A. 1)Distilled or deionised water can be used for special tests. EN 480-13:2002 (E) 5 5 Production of reference masonry mortar with standard consistence 5.1 Mix proportions The control and test mixes shall be in accordance with Table 2. Table 2
29、 Mix details Control mixTest mix Sand3 440 g3 440 g Cement640 g640 g AdmixtureNilCompliance Dose WaterAs requiredAs required Consistence measured according to EN 1015-4 40 5 mmwithin 3 mm of consistence of control mix Record to the nearest 1 g the total quantity of water required (including any cont
30、ributed by the admixture). For test mix mortars, the quantity of admixture added shall be sufficient to produce the required air content and retardation time if appropriate. The dose of admixture shall be recorded. 5.2 Mixing procedure Prior to mixing, each of the constituents shall be conditioned t
31、o a temperature of (20 2) C. Place all the sand and then the cement in the mixing bowl of a mixer complying with EN 196-1 and mix for 30 s at low speed. Continue mixing and add half of the mixing water during the next 30 s and mix for a further 60 s. During a further 30 s of mixing add the third qua
32、rter of the water and the admixture2). During a further 30 s of mixing add the final quarter of the mixing water. If necessary, the quantity of water shall be adjusted to obtain the required consistence. Continue mixing at low speed for 60 s after all the water has been added. Stop the mixer for 60
33、s.During this time loosen any unmixed material adhering to the sides and bottom of the bowl, using the mixer paddle, so that it is dispersed during subsequent mixing. Restart the mixer at high speed and mix for 60 s. Total mixing process time shall be 6 min. Immediately after completion of mixing, t
34、he consistence shall be determined in accordance with EN 1015-4 and the air content in accordance with EN 1015-7 method A. If the required consistence and air content are not achieved, the mix shall be discarded. A new test mix shall be prepared with the water content adjusted. 5.3 Mortar for test a
35、fter standing Prepare a test mix as described in 5.1 and 5.2. Cover the mixing bowl to prevent loss of water by evaporation and allow to stand for the period of time prescribed in prEN 934-3. After the required standing period from completion of mixing, remix the mortar in the bowl for 10 s using a
36、palette knife. 2)If recommended by the manufacturer, admixtures can be added at a different time in the mixing sequence. EN 480-13:2002 (E) 6 5.4 Mortar for test after extended mixing Prepare a test mix as described in 5.1 and 5.2. Then continue mixing at low speed for a further 15 min. 6 Calculatio
37、n of water reduction (air entraining/plasticizing admixtures) Calculate the percentage water reduction, W, resulting from inclusion of the admixture, from the following formula: 100 = C TC W )( where Cis the water requirement of the control mix in g; Tis the water requirement of the test mix in g, i
38、ncluding the water content of the admixture. The water reduction shall be reported to the nearest 1 %. 7 Test report The test report shall include the following information for control and test mixes: Cement Factory where produced Type C3A content Specific surface area Sand Source Type Grading Consi
39、stence Air content Water content of each mix Water reduction of test mix (for air entraining/plasticizing admixtures) Admixture name, batch/reference number and dose in g. blank BS EN 480-13:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent nation
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