BS EN 12390-1:2021 pdf free download – Testing hardened concrete Part 1: Shape, dimensions and other requirements for specimens and moulds.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 1101 and the following apply.
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3.1
nominal size
commonly used description of specimen size
3.2
designated size
specimen size in millimetres, selected and declared by the user of this standard from amongst the allowed range of nominal sizes
4 Shape, dimensions and tolerances of specimens
4.1 General
For application of EN ISO 1101 to the measurement of concrete test specimens and moulds in respect to flatness, perpendicularity and straightness, see Annex A.
For each shape of test specimen, cube, cylinder and prism, the nominal size d (Figures 1.2 and ) should be chosen to be at least three and a half times the maximum aggregate size (D max according to EN 206) in the concrete.
5.2.2.1 Moulds shall be suitable for producing specimens conforming to 42.
5.2.2.2 The tolerance on the designated size (d) of an assembled mould is 0,5 %.
5.2.2.3 The tolerance on the flatness of the four side faces of the mould is 0,000 6d mm.
5.2.2.4 The tolerance on the flatness of the top surface of the baseplate of the moulds is 0,00ld mm.
5.2.2.5 The tolerance on the perpendicularity of the sides of a mould with respect to the adjacent sides and of the sides in relation to the base is 0,5 mm.
NOTE If necessary, the flatness tolerance can be measured with the mould disassembled (see Annex B).
5.2.3 Calibrated moulds for cylindrical specimens
5.2.3.1 Moulds shall be suitable for producing specimens conforming to 4.i
5.2.3.2 The tolerance on the designated diameter (dJ and the designated height (2d) is 0,5 %.
5.2.3.3 The tolerance on the flatness of a base of a mould is 0,000 6d mm.
5.2.3.4 The tolerance on the perpendicularity of the side of a mould with respect to the base is 0,5 mm. NOTE If necessary, the flatness tolerance can be measured with the mould disassembled (see Annex B).
5.2.4 Calibrated moulds for prismatic specimens
5.2.4.1 Moulds shall be suitable for producing specimens conforming to 44.
5.2.4.2 The tolerance on the designated depth and width (d) of an assembled mould is 0,5 %.
5.2.4.3 The tolerance on the flatness of the internal sides is 0,002d mm.
5.2.4.4 The tolerance on the flatness of the top surface of the baseplate of the mould is 0,004d mm.
5.2.4.5 For mould surfaces with dimensions exceeding 150 mm, the flatness tolerances in 5.2.4.3 and 5.2.4.4 shall apply over any 150 mm length.
5.2.4.6 The tolerance on the perpendicularity of the sides of a mould with respect to the base is 0,5 mm. NOTE If necessary, the flatness tolerance can be measured with the mould disassembled (see Annex B).