1、BSI Standards PublicationBS EN 480-1:2014Admixtures for concrete,mortar and grout TestmethodsPart 1: Reference concrete and referencemortar for testingBS EN 480-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 480-1:2014. Itsupersedes BS EN 480-1:2006+A1:2
2、011 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/517/3, Admixtures.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contra
3、ct. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 85500 9ICS 91.100.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authori
4、ty of theStandards Policy and Strategy Committee on 30 November 2014.Amendments issued since publicationDate Text affectedBS EN 480-1:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 480-1 October 2014 ICS 91.100.10; 91.100.30 Supersedes EN 480-1:2006+A1:2011English Version Admixtures for co
5、ncrete, mortar and grout - Test methods - Part 1: Reference concrete and reference mortar for testing Adjuvants pour bton, mortier et coulis - Mthodes dessai -Partie 1: Bton et mortier de rfrence pour essais Zusatzmittel fr Beton, Mrtel und Einpressmrtel - Prfverfahren - Teil 1: Referenzbeton und Re
6、ferenzmrtel fr Prfungen This European Standard was approved by CEN on 14 September 2014. 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 lis
7、ts and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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
8、 the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yu
9、goslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP
10、EN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 480-1:2014 EBS EN 480-1:2014EN 480-1:2014 (E) 2 Contents Page
11、Foreword 3 1 Scope 5 2 Normative references 5 3 Constituent materials 5 3.1 Cement 5 3.2 Aggregate .6 3.2.1 Aggregate for reference concrete 6 3.2.2 Aggregate for reference mortar 6 3.3 Mixing water .6 4 Reference concrete .6 5 Reference mortar .7 6 Production of reference concrete 7 6.1 Mix proport
12、ion 7 6.2 Mixing and testing .7 7 Production of reference mortar 8 7.1 Mix proportions 8 7.2 Mixing and testing .8 8 Test report 9 BS EN 480-1:2014EN 480-1:2014 (E) 3 Foreword This document (EN 480-1:2014) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, the secre
13、tariat 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 April 2015 and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to
14、the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 480-1:2006+A1:2011. The main changes with respect to the previous edition are li
15、sted below: a) amendment of the cement range; b) editorial revision according to CEN Internal Regulations. This 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 tes
16、ting Part 2: Determination of setting time 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: Determinat
17、ion of air void characteristics in hardened concrete Part 12: Determination of the alkali content of admixtures 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 tes
18、t Part 15: Reference concrete and method for testing viscosity modifying admixtures This standard is applicable together with the standards of the series EN 934 Admixtures for concrete, mortar and grout. BS EN 480-1:2014EN 480-1:2014 (E) 4 According to the CEN-CENELEC Internal Regulations, the natio
19、nal standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lith
20、uania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 480-1:2014EN 480-1:2014 (E) 5 1 Scope This European Standard specifies the constituent materials, the composition and the mixing method to pr
21、oduce reference concrete and reference mortar for testing the efficacy and the compatibility of admixtures in accordance with the series EN 934. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application.
22、 For dated references, only the edition 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 196-2, Method of testing cement - Part 2: Chemical analysis of c
23、ement EN 196-6, Methods of testing cement - Part 6: Determination of fineness EN 197-1, Cement - Part 1: Composition, specifications and conformity criteria for common cements EN 413-2, Masonry cement - Part 2: Test methods EN 934 (all parts), Admixtures for concrete, mortar and grout EN 1008, Mixin
24、g 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 EN 12350-2, Testing fresh concrete - Part 2: Slump-test EN 12350-5, Testing fresh concrete - Part 5: Flow
25、 table test EN 12350-6, Testing fresh concrete - Part 6: Density EN 12350-7, Testing fresh concrete - Part 7: Air content - Pressure methods EN 12390-1, Testing hardened concrete - Part 1: Shape, dimensions and other requirements for specimens and moulds EN 12390-2, Testing hardened concrete - Part
26、2: Making and curing specimens for strength tests EN 12620, Aggregates for concrete 3 Constituent materials 3.1 Cement The reference concrete and mortar shall be made with a CEM I cement of strength class 42,5 or 52,5 conforming to EN 197-1. The cement used shall have a C3A content of 7 % to 11 % by
27、 mass calculated from chemical analysis according to EN 196-2 and a specific surface of (3 200 to 4 600) cm2/g determined according to EN 196-6. BS EN 480-1:2014EN 480-1:2014 (E) 6 3.2 Aggregate 3.2.1 Aggregate for reference concrete A natural normal weight aggregate conforming to EN 12620 with low
28、water absorption (less than 2 % by mass) shall be used. The size fractions of the aggregate used in the production of reference concretes shall lie within the limits given in Table 1. Table 1 Aggregate for reference concrete Aperture size (mm) Percentage by mass passing the test sieve a) b)31,5 100
29、16,0 75 to 95 8,0 45 to 70 4,0 35 to 50 2,0 25 to 40 1,0 20 to 35 0,5 10 to 25 0,25 4 to 12 0,125 1 to 8 a)The range is selected to accommodate both crushed and uncrushed aggregate. b) The variation in the quantity passing each sieve of the chosen grading for both mixes (control and test mix) shall
30、not exceed 2,0 % by mass. 3.2.2 Aggregate for reference mortar Standard sand according to EN 196-1 shall be used as the aggregate for the reference mortar. 3.3 Mixing water Water according to EN 1008 shall be used as mixing water. Distilled or de-ionised water may be used in special cases. It is not
31、 allowed to use wash water from concrete production. 4 Reference concrete Unless otherwise specified, tests on reference concrete are performed as comparative tests. That is, the performance of admixtures is determined by comparing the reference concrete containing an admixture (test mix) with the r
32、eference concrete made without an admixture (control mix) but otherwise with the same aggregate/cement ratio and constituent materials from the same delivery. The requirements of reference concretes shall be as given in Table 2. The fresh concrete shall be fully compacted. The air content in the con
33、trol mix shall not exceed 2 % by volume. BS EN 480-1:2014EN 480-1:2014 (E) 7 Table 2 Requirements for reference concrete a)Reference concrete Cement content c)kg/m3Consistence at required test temperature b), d)Slump (mm) Flow (mm) I 350 5 70 10 400 20 II 300 5 120 20 450 20 III 350 5 50 10 350 10 I
34、V 350 5 30 10 350 20 a)When testing at equal w/c ratio the requirements for consistence shall only apply to the control mix. b) These consistence tests are alternatives and have to be chosen before starting the test. Slump shall be determined in accordance with EN 12350-2 or flow in accordance with
35、EN 12350-5 respectively. c) Control mix only: The resulting cement content of the test mix may change as a result of volume change to concrete caused by water reducing or air entraining effects of the admixture under test. d) For high range water reducing/superplasticising admixture the consistence
36、of the test mix shall be not less the consistence of the control mix with no upper limit on consistence of the test mix. 5 Reference mortar Unless otherwise specified, tests on reference mortar are performed as comparative tests. That is, comparing the performance of the reference mortar containing
37、an admixture (test mix) with the performance of the reference mortar without an admixture (control mix). Standard mortar conforming to EN 196-1 shall be used as the reference mortar. 6 Production of reference concrete 6.1 Mix proportion The cement content shall be in accordance with Table 2. Aggrega
38、te shall be used in an oven dry condition ( 105 C) to remove doubts on moisture content variation. If the aggregate is not oven dry, its moisture content shall be determined and the specific gravity shall be corrected accordingly. In case of dispute, oven dry aggregate shall be used. The test mix sh
39、all have the same aggregate:cement ratio as the control mix but the water content shall be adjusted to give a consistence within the limits given in Table 2 for the control mix. The water content of the mix shall be calculated from the moisture content of the aggregate, the mixing water and the wate
40、r content of the admixture. In the case of the plasticised or superplasticised flowing concrete mix and when testing water resisting admixtures at equal w/c ratio no water reduction shall be made. 6.2 Mixing and testing Prior to mixing, each of the constituents shall be conditioned to a temperature
41、of (20 2) C or when required by the test method, to (5 1) C. The following mixing technique shall be adopted to ensure repeatability of results, and eliminate initial absorption effects on consistence: Use a forced action pan mixer to its minimum of 50 % capacity (maximum 90 % of capacity). Wipe the
42、 inside with a damp cloth if dry. BS EN 480-1:2014EN 480-1:2014 (E) 8 Add all of the aggregate to the pan mixer with half the mixing water. Mix for two minutes, then stand for two minutes. Cover the pan mixer during the standing period to minimise evaporation effects. Re-start the mixer for thirty s
43、econds after or whilst adding the cement. Add the remaining water (plus admixture in the test mix) over the next thirty seconds. Mix for two minutes. In the case of powder admixture, the admixture shall be added to the dry constituents of the concrete unless otherwise specified by the manufacturer.
44、Determine the consistence within five minutes from completion of mixing. Immediately after mixing and initial testing, store the specimens at the required test temperature, (20 2) C or (5 1) C. If the consistence is outside the limit in Table 2, (except test mixes at equal w/c ratio and in accordanc
45、e with Table 2 footnote d) discard the mix and repeat at a revised water content. Determine the density according to EN 12350-6 and check whether the cement content conforms to the values given in Table 2. If the cement content is outside the limits discard the mix and repeat with a revised content
46、of cement, aggregate and water. Measure air content according to EN 12350-7 and make specimens within 30 min from completion of mixing. Unless otherwise specified in the standards of the series EN 934, three cubes or cylinders shall be taken for compressive strength testing at each test age and resu
47、lts averaged for the assessment of compliance. Prepare and cure the specimens in accordance with EN 12390-2 using moulds conforming to EN 12390-1. If one of the specimens varies from the average for the set by more than 10 %, it shall be discarded and the average recalculated on the remaining two sp
48、ecimens. 7 Production of reference mortar 7.1 Mix proportions The proportion of cement and sand shall be in accordance with EN 196-1. The amount of water added to the control mix shall be in accordance with EN 196-1. For test mixes the water added shall be sufficient to give equal consistence to tha
49、t of the control mix, except when testing water resisting admixtures at equal w/c ratio. 7.2 Mixing and testing The requirements of conditioning and temperature after mixing shall be as specified in 6.2. Mix the dry sand and cement for 30 s at low speed in a mixer in accordance with EN 196-1. Add all the water (plus admixture in the test mix) over the next 30 s at low speed. In the case of a powder admixture, which is not soluble or dispersible, the admixture shall be added to the dry constituents o
