1、 Reference number ISO 1920-3:2004(E) ISO 2004INTERNATIONAL STANDARD ISO 1920-3 First edition 2004-10-01 Testing of concrete Part 3: Making and curing test specimens Essais du bton Partie 3: Confection et prise des prouvettes ISO 1920-3:2004(E) PDF disclaimer This PDF file may contain embedded typefa
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6、 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reservedISO 1920-3:2004(E) ISO 2004 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions
7、. 1 4 Shape, dimensions and tolerances of specimens and moulds . 2 4.1 General. 2 4.2 Cubes . 2 4.3 Cylinders 2 4.4 Prisms 4 5 Apparatus. 4 5.1 Apparatus for measuring the test specimens 4 5.2 Apparatus for making test specimens 5 6 Preparation of test specimens. 6 6.1 Sampling 6 6.2 Preparation and
8、 filling of the mould . 6 6.3 Compaction of the concrete. 6 6.4 Surface levelling 6 6.5 Marking. 6 7 Curing of test specimens . 6 8 Measurement of dimensions and shape.7 8.1 Specimens made in calibrated moulds. 7 8.2 Specimens made in uncalibrated moulds 7 9 Report. 7 Annex A (informative) Wet sievi
9、ng of concrete. 9 Annex B (informative) Application of ISO 1101 to concrete test specimens and moulds 10 Annex C (normative) Lightweight cylindrical moulds 12 Annex D (normative) Methods of compaction. 18 Annex E (informative) Example of specimen preparation test report. 19 Bibliography . 20 ISO 192
10、0-3:2004(E) iv ISO 2004 All rights reservedForeword ISO (the International Organization for Standardization) is 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
11、 body interested in a subject for which a technical committee has been established has the right to be represented 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 Elect
12、rotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted 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 adopte
13、d by the technical committees are circulated to the member bodies for voting. Publication as an International 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
14、 rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1920-3 was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and prestressed concrete, Subcommittee SC 1, Test methods for concrete. This first edition of ISO 1920-3 cancels and repla
15、ces ISO 1920:1976 and ISO 2736-2:1986 which 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 test specimens Part 4: Strength of harde
16、ned concrete Part 5: Properties of hardened concrete other than strength Part 6: Sampling, preparing and testing of concrete cores Part 7: Non-destructive tests on hardened of concrete INTERNATIONAL STANDARD ISO 1920-3:2004(E) ISO 2004 All rights reserved 1Testing of concrete Part 3: Making and curi
17、ng test specimens WARNING Some concrete specimens might be too heavy for one person to carry and it is necessary that appropriate means be arranged to carry them. The use of vibrating equipment, such as vibration tables, can cause damage to joints and loss of sensation due to nerve damage. It is nec
18、essary that moulds, density containers, etc. be clamped to the table and not held in position using ones hands while they are being vibrated. 1 Scope This part of ISO 1920 specifies the shape and dimensions of concrete test specimens for strength tests and the methods of making and curing these test
19、 specimens. 2 Normative references The following referenced documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1920-1, Testin
20、g of concrete Part 1: Sampling of fresh concrete ISO 1101:1983, Technical drawings Geometrical tolerancing Tolerancing of form, orientation, location and run-out Generalities, definitions, symbols, indications on drawings 3 Terms and definitions For the purpose of this document, the terms and defini
21、tions given in ISO 1101:1983 and the following apply. 3.1 nominal sizes of specimens range of commonly used specimen sizes amongst which a preferred size is specified in this part of ISO 1920 3.2 designated size of specimens specimen size selected and declared by the user of this part of ISO 1920 fr
22、om amongst the permitted range of nominal sizes NOTE The size of specimens is designated in millimetres. ISO 1920-3:2004(E) 2 ISO 2004 All rights reserved4 Shape, dimensions and tolerances of specimens and moulds 4.1 General For each shape of test specimen, e.g. cube, cylinder, and prism, the basic
23、dimensions, l or d, should be chosen to be at least four times the maximum size of the aggregate in the concrete. NOTE A procedure for wet screening as described in Annex A can be used when the maximum size of the aggregate is larger than 1/4 of the basic dimension, l or d. 4.2 Cubes 4.2.1 Nominal s
24、izes The nominal sizes are as shown in Figure 1, where l ( = l 1 or l 2or l 3 ) equals 100 mm, 120 mm, 150 mm, 200 mm, 250 mm or 300 mm. Figure 1 Nominal sizes of a cube The preferred sizes are 100 mm and 150 mm. 4.2.2 Designated sizes The designated size shall be selected from one of the nominal si
25、zes given in 4.2.1. 4.2.3 Tolerances The following tolerances apply. a) The tolerance on the designated size shall be 0,5 %. b) The tolerance on the flatness of the load-bearing surfaces shall be 0,000 5 l, expressed in millimetres. c) The load-bearing surfaces shall be parallel to a tolerance of no
26、t greater than 1,0 mm. d) The tolerance on the perpendicularity of the sides of the cube with reference to the base shall be 0,5 mm. For the definitions of flatness, parallelism, perpendicularity and straightness, see Annex B. 4.3 Cylinders 4.3.1 Nominal sizes The nominal sizes are as shown in Figur
27、e 2, where d equals 100 mm, 113 mm, 125 mm, 150 mm, 200 mm, 250 mm or 300 mm. ISO 1920-3:2004(E) ISO 2004 All rights reserved 3Figure 2 Nominal sizes of a cylinder NOTE The diameter of 113 mm corresponds to a load-bearing area of 10 000 mm 2 . The preferred sizes are 100 mm 200 mm, 125 mm 250 mm and
28、 150 mm 300 mm. The height, h, of the cylinder shall be 2d except for specimens used for the tensile splitting test. In the latter case, the height of the specimen shall be between d and 2d. 4.3.2 Designated sizes Designated sizes may be selected within 10 % of a nominal size. 4.3.3 Tolerances The f
29、ollowing tolerances apply. a) The tolerance on the designated diameter, d, shall be 0,5 %. b) The tolerance on the flatness of the load-bearing surfaces shall be 0,000 5 d, expressed in millimetres, except for cylinders tested by unbonded capping methods. c) The tolerance on the flatness of the load
30、-bearing surfaces of cylinders tested by unbonded capping methods, such as sand box or elastomeric pads, shall be 0,02 d, expressed in millimetres. d) The load-bearing surfaces shall be parallel to a tolerance of not greater than 1,0 millimetres. e) The tolerance on the perpendicularity of the sides
31、 of the cylinder with reference to the end faces shall be 0,5 mm. f) The tolerance on the height, h, of the cylinders shall be 5 %. g) The straightness tolerance on any surface parallel to the centre line of the cylinders to be used in compression tests shall be 0,5 mm. h) The straightness tolerance
32、 of any surface parallel to the centre line of the cylinders to be used in tensile splitting tests shall be 0,2 mm. ISO 1920-3:2004(E) 4 ISO 2004 All rights reserved4.4 Prisms 4.4.1 Nominal sizes The nominal sizes are as shown in Figure 3, where l (=l 1or l 2 ) equals 100 mm, 150 mm, 200 mm, 250 mm
33、or 300 mm and L W 3,5 l. Figure 3 Nominal sizes of prisms The preferred sizes are l = 100 mm and L = 400 mm or l = 150 mm and L = 600 mm. 4.4.2 Designated sizes The designated depth, l 1 , and width, l 2 , of prisms shall be selected from one of the nominal sizes given in 4.4.1. The designated lengt
34、h, L, of prisms shall be not less than 3,5 l. 4.4.3 Tolerances The following tolerances apply. a) The tolerance on the designated depth, l 1 , and width, l 2 , shall be 0,5 %. b) The tolerance on the designated length, L, shall be 5 %. c) The load-bearing surfaces shall be parallel to a tolerance no
35、t greater than 1,0 mm. d) The tolerance on the perpendicularity of the sides of the prism with reference to the base shall be 0,5 mm. e) The tolerance on the straightness of the load-bearing area for specimens to be used for bending (flexural) tests shall be 0,2 mm. 5 Apparatus 5.1 Apparatus for mea
36、suring the test specimens. 5.1.1 Callipers and/or rules, capable of establishing that the relevant dimensions of specimens or moulds are within 0,5 % of the dimension. 5.1.2 Gauge, capable of establishing that the relevant flatness of specimens or moulds is within 0,000 5 l or d. 5.1.3 Squares and g
37、auges (or other similar means), capable of establishing the perpendicularity and parallelism of specimens and moulds within 0,5 mm. ISO 1920-3:2004(E) ISO 2004 All rights reserved 55.2 Apparatus for making test specimens 5.2.1 Moulds, capable of providing test specimens with the dimensions and toler
38、ances that conform to this part of ISO 1920. The moulds shall be made of steel or cast-iron, which shall be the reference materials. If moulds are manufactured from other materials, performance test data shall be available that demonstrate equivalence with the steel or cast-iron moulds. Lightweight
39、cylindrical moulds shall conform to the requirements in Annex C. Moulds shall be watertight and shall be non-absorbent. Moulds shall be checked at intervals of not more than 1 year. If the mould is in calibration at time of use, the checking of parallelism, verticality and flatness of specimens is n
40、ot required, provided the size measurements are within tolerance. Individual moulds shall be identifiable. The designation should be an identification number either welded on the mould body or securely tagged to the moulds. 5.2.2 Filling frame, fitted tightly to the mould and used to simplify the fi
41、lling of the moulds. The use of a filling frame is optional, but if used, this shall be stated in the test report (see Clause 9). 5.2.3 Means of compacting the concrete in the mould, which shall be one of the following: 5.2.3.1 internal vibrator, with a minimum frequency of 120 Hz (7 200 cycles per
42、minutes). The diameter of the tube shall not exceed one-quarter of the smallest dimension of the test specimen; 5.2.3.2 vibrating table, with a minimum frequency of 40 Hz (2 400 cycles per minute); 5.2.3.3 compacting rod, of circular cross-section, straight, made of steel, having a diameter of 16 mm
43、 1 mm and a length of 600 mm 5 mm, and with rounded, roughly hemispherical, ends; 5.2.3.4 compacting bar, made of steel having a square or circular cross-section and a mass greater than 1,8 kg. 5.2.4 General tools, including the following: a) scoop, approximately 100 mm wide; b) steel floats, two; c
44、) sampling tray, with minimum dimensions of 900 mm 900 mm 50 mm deep, of rigid construction and made from a non-absorbent material not readily attacked by cement paste; d) shovel, square-bladed; e) release material, non-reactive; f) mallet; g) timer, having an accuracy of 1 s; ISO 1920-3:2004(E) 6 I
45、SO 2004 All rights reserved6 Preparation of test specimens 6.1 Sampling The samples shall be taken in accordance with ISO 1920-1. The samples shall be remixed before filling the mould. Concrete mixed in a laboratory need not be remixed. 6.2 Preparation and filling of the mould Before filling, cover
46、the inner surface of the mould with a thin film of mineral oil or any other material to prevent the concrete from adhering to the mould. Place the mould on a firm and level area. If a filling frame is used, the amount of concrete used to fill the mould shall be such that a layer of concrete remains
47、in the filling frame after compaction. The thickness of this layer shall be 10 % to 20 % of the height of the test specimen. Place the concrete in the mould by means of a scoop, in such a way as to remove as much entrapped air as possible (without significantly reducing the amount of entrained air,
48、if present). The concrete shall be placed in a minimum of two layers approximately equal in depth and each not more than 100 mm thick. Use the quantity of material in the final layer that, as nearly as possible, is just sufficient to fill the container without having to remove excess material. A sma
49、ll quantity of additional concrete may be added if necessary and further compacted in order to just fill the container, but the removal of excess material should be avoided. 6.3 Compaction of the concrete Compact the concrete immediately after each layer is placed in the moulds in such a way as to produce full compaction of the concrete with neither excessive segregation nor laitance. Compact each layer by using one of the methods described in Annex D. 6.4 Sur
