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1、 Reference number ISO 1920-2:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 1920-2 First edition 2005-04-15 Testing of concrete Part 2: Properties of fresh concrete Essais du bton Partie 2: Caractristiques du bton frais Copyright International Organization for Standardization Provided by IHS under lice
2、nse with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 01:59:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1920-2:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy,
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5、sure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or util
6、ized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax
7、+ 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 01:59:05
8、MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1920-2:2005(E) ISO 2005 All rights reserved iii Contents Page Forewordiv Introduction v 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 Determination of consistence2 4.1 General.2 4.2 Sampling2 4.3 Slump tes
9、t2 4.4 Vebe test 5 4.5 Degree of compactability test8 4.6 Flow-table test.11 4.7 Slump-flow test .15 5 Determination of fresh density18 5.1 Principle.18 5.2 Apparatus.18 5.3 Sampling19 5.4 Procedure.19 5.5 Test result20 5.6 Test report20 6 Determination of air content21 6.1 General.21 6.2 Sampling21
10、 6.3 Filling the container and compacting the concrete.21 6.4 Pressure-gauge method.22 6.5 Water-column method24 6.6 Calculations and expression of results27 6.7 Test report27 7 Test report28 Annex A (informative) Precision Data for the density measurements .29 Annex B (normative) Calibration of the
11、 container for the density test.30 Annex C (informative) Additional calculations for the density test.31 Annex D (informative) Precision Water-column method .32 Annex E (normative) Calibration of apparatus Pressure-gauge method.33 Annex F (normative) Calibration of apparatus Water-column method 35 A
12、nnex G (normative) Aggregate corrector factor Pressure-gauge method 38 Annex H (normative) Aggregate correction factor Water-column method40 Annex I (informative) Examples of test reports and worksheets.42 Bibliography .56 Copyright International Organization for Standardization Provided by IHS unde
13、r license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 01:59:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1920-2:2005(E) iv ISO 2005 All rights reserved Foreword ISO (the International Organization for Standardization) i
14、s a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represe
15、nted on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are d
16、rafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International
17、Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1920-2 was prepa
18、red by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre- stressed concrete, Subcommittee SC 1, Test methods for concrete. This first edition of ISO 1920-2 cancels and replaces the first edition of ISO 4109:1980, ISO 4110:1979, ISO 4111:1979, ISO 4848:1980 and ISO 6276:1982, which
19、 have been technically revised. ISO 1920 consists of the following parts, under the general title Testing of concrete: Part 1: Sampling of fresh concrete Part 2: Properties of fresh concrete Part 3: Making and curing of test specimens Part 4: Strength of hardened concrete Part 5: Properties of harde
20、ned concrete other than strength Part 6: Sampling, preparing and testing of concrete cores Part 7: Non-destructive tests on hardened concrete Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for R
21、esale, 04/05/2007 01:59:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1920-2:2005(E) ISO 2005 All rights reserved v Introduction International Standards are widely adopted at the regional or national level and applied by manufacturers, trade organizations, purchase
22、rs, consumers, testing laboratories, authorities and other interested parties. Since these standards generally reflect the best experience of industry, researchers, consumers and regulators worldwide and cover common needs in a variety of countries, they constitute one of the important bases for the
23、 removal of technical barriers to trade. However, full adoption may not be practicable in all cases for reasons such as regional or national security, protection of human health or safety, or protection of the environment, or because of fundamental climatic, geographical or technological problems. A
24、s a consequence, the corresponding technical deviations to ISO standards are permitted where required by national or regional legislation or industry convention when adopting an International Standard. Where such national deviations are required, it is important that they are clearly identified and
25、the reasons for the deviations stated. Depending of on the method of adoption of the International Standard, the deviations will be noted in the national introduction, in the preface or foreword (for small numbers) or as a national annex (for large numbers). See ISO/IEC Guide 21-1 for more informati
26、on. ISO/TC 71 has identified those items in this part of ISO 1920-2 that may be the subject of national or regional deviations. The items are indicated in the text by the phrase “except where the national annex to this part of ISO 1920 requires”. Copyright International Organization for Standardizat
27、ion Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 01:59:05 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with IS
28、O Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 01:59:05 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 1920-2:2005(E) ISO 2005 All rights reserved 1 Testing of concrete Part 2: Properties of fresh concrete Cauti
29、on When cement is mixed with water, alkali is released. When sampling, prevent skin contact with wet cement or concrete by wearing suitable protective clothing (gloves, footwear, safety glasses). If wet cement or concrete enters the eye, immediately wash it out thoroughly with clean water and seek m
30、edical treatment without delay. Wash wet concrete off the skin immediately. Caution The use of vibrating equipment, such as vibration tables, can cause damage to joints and loss of sensation due to nerve damage. Moulds, density containers, etc. should be clamped to the table and not held in position
31、 using ones hands while they are being vibrated. 1 Scope This part of ISO 1920 specifies procedures for testing fresh concrete. It specifies the following test methods: determination of consistence (slump test, Vebe test, degree of compactability, flow-table test and for high-fluidity concrete, the
32、slump-flow test), determination of fresh density and determination of air content by the pressure-gauge method and by the water-column method. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cite
33、d applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1101:1983, Technical drawing Geometric tolerances Tolerancing of form, orientation, location and run-out Generalities, definitions, symbols, indications on drawings ISO 1920-1, Te
34、sting of concrete Part 1: Sampling of fresh concrete 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 fresh density mass of a quantity of fully compacted fresh concrete divided by its volume NOTE The fresh density is expressed in kilograms per
35、 cubic metre. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 01:59:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1920-2:2005(E) 2 ISO 20
36、05 All rights reserved 4 Determination of consistence 4.1 General The consistence of the concrete is determined by one of the methods described below: slump test (see 4.3); Vebe test (see 4.4); degree of compactability (see 4.5); flow-table test. (see 4.6); slump-flow test for high-fluidity concrete
37、 (see 4.7). These methods are not applicable to foamed concrete, no-fines concrete or where the maximum aggregate size exceeds 40 mm. 4.2 Sampling Samples for the tests shall be obtained in accordance with ISO 1920-1. Each sample shall be remixed before carrying out the tests. 4.3 Slump test 4.3.1 P
38、rinciple The fresh concrete is compacted into a mould in the shape of a frustum of a cone. When the cone is withdrawn upwards, the distance the concrete has slumped provides a measure of the consistence of the concrete. The slump test is applicable to a range of consistence of concrete that correspo
39、nds to slumps of between 10 mm and 210 mm. Outside this range, the measurement of slump may be unsuitable and other methods of determining the consistence should be considered. If the slump continues to change over a period of 1 min after demoulding, this test is not suitable. NOTE For high-fluidity
40、 concrete, the slump-flow test described in 4.7 is a more appropriate test. 4.3.2 Apparatus Note the calibration requirements associated with each apparatus. 4.3.2.1 Mould, suitable of forming the test specimen, made of a metal not readily attacked by cement paste and not thinner than 1,5 mm. The mo
41、uld may be made either with or without a seam. The interior of the mould shall be smooth and free from projections such as protruding rivets and shall be free from dents. The mould shall be in the form of hollow frustum of a cone and shall have the following internal dimensions: diameter of base: 20
42、0 mm 2 mm; diameter of top: 100 mm 2 mm; height: 300 mm 2 mm. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 01:59:05 MDTNo reproduction or networking permitted without li
43、cense from IHS -,-,- ISO 1920-2:2005(E) ISO 2005 All rights reserved 3 The base and the top shall be open and parallel to each other and at right angles to the axis of the cone. The mould shall be provided, on the upper portion, with two handles at two-thirds of the height, and at the bottom with fi
44、xing clamps or foot pieces to hold it steady. A mould that can be clamped to the base is acceptable, provided the clamping arrangement can be fully released without movement of the mould or interference with the slumping concrete. The mould shall be visually checked prior to each use to assure that
45、it is clean and is not damaged or dented. The cone shall be checked annually to ensure that its dimensions and conditions remain within tolerances. 4.3.2.2 Tamping rod, straight, made of steel, having a circular cross-section with a diameter of 16 mm 1 mm, 600 mm 5 mm in length, and with rounded end
46、s. The rod may be extended with a handle of plastic conduit, provided that the overall length does not exceed 1 000 mm. The tamping rod shall be checked annually to ensure that its dimensions and conditions remain within tolerances. 4.3.2.3 Funnel (optional), made of a non-absorbent material not rea
47、dily attacked by cement paste. The funnel shall consist of two co-axial conical frustums having a common diameter of 100 mm, the ends being of greater diameter, one frustum to act as a filling funnel and the other as a collar to enable the funnel to be located on the outer surface of the mould. The
48、funnel shall be checked annually to ensure that its dimensions and conditions remain within tolerances. 4.3.2.4 Rule, graduated from 0 mm to 300 mm, at intervals not exceeding 5 mm, with the zero point being at the extreme end of the rule. 4.3.2.5 Base plate/surface, rigid, flat, non-absorbent and smooth plate or other surface on which to place the mould. 4.3.2.6 Shovel, with a square blade. 4.3.2.7 Re-mixing tray, of rigid const