1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Test methods Part 2: Determination of setting timeThe European Standard EN 480-2:2006 has the statu
2、s of a British StandardICS 91.100.30Admixtures for concrete, mortar and grout BRITISH STANDARDBS EN 480-2:2006BS EN 480-2:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006ISBN 0 580 49250 8Amendments issued since
3、publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Standard was published by BSI. It is the UK implementation of EN 480-2:2006. It supersedes BS E
4、N 480-2:1997 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/3, Admixtures.A list of organizations represented on B/517/3 can be obtained on request to its secretary.This publication does not purport to include al
5、l the necessary provisions of a EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 480-2 August 2006 ICS 91.100.30 Supersedes EN 480-2:1996 English Version Admixtures for concrete, mortar and grout - Test methods - Part 2: Determination of setting time Adjuvants pour bton, mortier et coulis - Mtho
6、des dessai -Partie 2: Dtermination du temps de prise Zusatzmittel fr Beton, Mrtel und Einpressmrtel - Prfverfahren - Teil 2: Bestimmung der Erstarrungszeit This European Standard was approved by CEN on 19 June 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stip
7、ulate 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 member. This European Standard e
8、xists 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 are the national standards
9、bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN
10、COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 480-2:2006: EEN 480-2:2006 (E)
11、2 Contents Page Foreword3 1 Scope 5 2 Normative references 5 3 Test principle5 4 General requirements for testing.5 4.1 Laboratory 5 4.2 Apparatus .5 4.3 Materials .6 5 Setting time test.6 5.1 Apparatus .6 5.2 Preparation of the mortar8 5.3 Filling the mould 8 5.4 Test procedure.8 5.4.1 Determinatio
12、n of initial setting time.8 5.4.2 Determination of final setting time.8 5.4.3 Manual Vicat.9 6 Test report 9 Bibliography 10 EN 480-2:2006 (E) 3 Foreword This document (EN 480-2:2006) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, the secretariat of which is hel
13、d 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 February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. This document supersedes EN 480-2:199
14、6. This draft European Standard is part of the series EN 480 Admixtures for concrete, mortar and grout Test methods which comprises the following: Part 1 Reference concrete and reference mortar for testing Part 2 Determination of setting time Part 4 Determination of bleeding of concrete Part 5 Deter
15、mination 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 concrete Part 12 Determination of the alkali content of admixt
16、ures Part 13 Reference masonry mortar for testing mortar admixtures Part 14 Determination of the effect on corrosion susceptibility of reinforcing steel by potentiostatic electro-chemical test1)This standard is applicable together with the other standards of the series EN 934 Admixtures for concrete
17、, mortar and grout. Notification of revisions: The previous edition EN 480-2:1996 has been revised as follows: - provision for using a manual Vicat; - general editorial revision. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bo
18、und to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, 1) This part is under preparation. EN 480-2:2006 (E) 4 Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
19、 Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 480-2:2006 (E) 5 1 Scope This European Standard describes a method for determining setting time of mortar with and without admixtures. It is an adaptation of the setting time test described in EN 196-3. This European Sta
20、ndard describes the reference method; it allows the use of alternative apparatus as indicated in notes provided that they do not affect the results. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the editio
21、n cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 196-1, Methods of testing cement Part 1: Determination of strength EN 413-2, Masonry cement Part 2: Test methods EN 480-1, Admixtures for concrete, mortar and grout Test meth
22、ods Part 1: Reference concrete and reference mortar for testing EN 1008, Mixing water for concrete Specification for sampling, testing and assessing the suitability of water, including water recovered from processes in the concrete industry, as mixing water for concrete 3 Test principle The setting
23、time is determined by observing the penetration of a needle into a reference mortar until it reaches a specified value. The reference mortar with admixture (test mix) shall have the same consistence as the reference mortar without admixture (control mix) that conforms to EN 480-1. For this purpose t
24、he mixing water required shall be determined in advance according to EN 413-2. 4 General requirements for testing 4.1 Laboratory The laboratory in which specimens are prepared and tested shall be maintained at a temperature of (20 2) C and a relative humidity no less than 65 %. After preparation and
25、 between tests, the specimen shall be stored in a room or cabinet having a relative humidity of no less than 90 % and a temperature of (5 1) C or (20 2) C as appropriate to the test requirements. 4.2 Apparatus a) balance, accurate to 1 g; b) graduated cylinder or burette, accurate to 1 % of the volu
26、me measured; c) mixer, complying with EN 196-1. EN 480-2:2006 (E) 6 4.3 Materials Mortar shall be prepared by using the standard sand described in EN 196-1. Water according to EN 1008 shall be used as mixing water2). Cement, sand, water, admixture and apparatus used to make the specimens shall be st
27、ored at a temperature selected for the test (5 1) C or (20 2) C for at least 12 h before the mortar is prepared. 5 Setting time test 5.1 Apparatus Vicat apparatus as shown in Figure 1 a) with a needle as shown in Figure 1 b). The needle (Figure 1 b) shall be of non-corrodible metal with an effective
28、 height of (50 1) mm and a diameter of (1,13 0,05) mm. To prevent the needle of the Vicat apparatus striking the base plate of the mould, a stopping device (Figure 1 c) is recommended. A suitable device fixed to the central plunger of the apparatus such that the needle can be stopped at approximatel
29、y 2 mm from the bottom of the mould is shown in Figure 1 a). This device takes the form of a split clamp which can be fixed in any position to suit the apparatus, and when loosened should not impart any friction to the plunger. The total mass of the moving parts, including the stopping device, shall
30、 be (1 000 2) g. Their movement shall be truly vertical and without appreciable friction, and their axes shall coincide with that of the needle. NOTE 1 Devices for automatic determination of the setting time are commercially available and may be used provided that they can be shown to give the same
31、test results to those obtained with the specified apparatus and procedure. EN 480-2:2006 (E) 7 Dimensions in millimetres a) Side view with mould in upright position for initial setting time determination b) Front view with mould inverted for the determination of final setting time c) Needle d) Examp
32、le of a stopping device Key 1 hard rubber mould 2 platform for correcting weights 3 glass plate 4 stopping device Figure 1 Vicat apparatus for determining the setting time of mortar EN 480-2:2006 (E) 8 The Vicat mould (see Figure 1 a) to contain the mortar under test shall be of hard rubber. It shal
33、l be of truncated conical form (40,0 0,2) mm deep and shall have internal diameters at top and bottom of (70 5) mm and (80 5) mm respectively. It shall be adequately rigid and shall be provided with a plane glass or hard rubber base plate larger than the mould and at least 2,5 mm thick. NOTE 2 Mould
34、s may be of metal or plastics and of cylindrical shape provided that they are of the specified depth and that they can be shown to give the same test results as the specified hard rubber mould of truncated conical form. 5.2 Preparation of the mortar The mortar shall be prepared in accordance with EN
35、 480-1. 5.3 Filling the mould Place the mortar in the mould (previously placed on a flat, lightly greased base plate) immediately after mixing. Seal the joint between the mould and the base plate to prevent bleeding. Fill the mould completely without undue segregation or vibration. Remove the excess
36、 mortar by a careful back and forth movement with a tool having a straight edge so as to leave the mortar filling the mould with its top surface as flat as possible. Transfer this specimen immediately to the storage conditions as described in 4.1. 5.4 Test procedure 5.4.1 Determination of initial se
37、tting time First, set the Vicat apparatus by lowering the needle onto the base plate to adjust the zero reference of the scale. Keep the filled mould and its base plate in the room or humidity cabinet specified in 4.1 and after a suitable period of time align them beneath the needle of the Vicat app
38、aratus. Lower the needle carefully until it comes into contact with the mortar. Wait for 1 to 2 s in this position so as to avoid any initial velocity or forced acceleration of the plunger. Then release the plunger rapidly. The needle should penetrate the mortar vertically. Read the scale when penet
39、ration is complete or 30 s after the plunger has been released whichever of these two time limits is the earlier. Record the reading, which indicates the distance between the end of the needle and the base plate together with the time, which has elapsed since completion of mixing. Repeat the penetra
40、tion test on the same specimen at suitably spaced positions more than 10 mm from the edge of the mould or each other and at suitable time intervals, for example at intervals of 10 min. Keep the specimen in a room or humidity cabinet in accordance with 4.1 between penetration tests. If using an autom
41、atic setting time meter determine the initial setting time by drawing the characteristic line. The time measured from completion of mixing until the time at which the distance between the needle and the base plate is 4,0 mm is the initial setting time for the mortar. For manual and automatic methods
42、 select time intervals between penetrations so that the initial setting time can be determined within ca. 5 % of the measured value. Results may be interpolated to determine the exact initial setting time. NOTE The presence of sand will cause a greater spread in the penetration depth results than wh
43、en using cement paste. 5.4.2 Determination of final setting time Turn over the filled mould used in 5.4.1 onto the base plate of the Vicat apparatus (see figure 1b) so that final setting time tests can be carried out on the face of the specimen, which was originally in contact with the base plate. E
44、N 480-2:2006 (E) 9 If using an automatic setting time meter continue taking measurements without turning the mould over, taking care to prevent the needle from penetrating the marks of previous measurements. The setting time measured from completion of mixing until the time after which the needle no
45、 longer penetrates 2,5 mm into the specimen is the final setting time for the mortar. This is determined as described in 5.4.1. 5.4.3 Manual Vicat Where a manual Vicat is being used for testing, the setting time may be interpolated to cover overnight periods by giving setting between time limits e.g
46、. x hours, y hours. This interpolative method is not permitted where comparative results are required or where the expected setting time is less than 8 h. 6 Test report The following items shall be reported: type of test equipment; temperature to the nearest 1 C at which the test is carried out; ini
47、tial and final setting times expressed in minutes. EN 480-2:2006 (E) 10 Bibliography 1 EN 196-3, Methods of testing cement Part 3: Determination of setting time and soundness blankBS EN BSI389 Chiswick High RoadLondonW4 4AL480-2:2006BSI British Standards InstitutionBSI is the independent national bo
48、dy responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest
49、 amendments or editions.It is the constant aim of BSI to improve the quality 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 technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensures that subscribers auto
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1