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Specifies a method for the determination of the static modulus of elasticity in compression of hardened concrete, on test specimens which may be cast or taken from a structure. Covers also apparatus, test specimens, preparation of test specimens, determination or compressive strength and static modulus of elasticity, expression of results, and test report.

Specifies tolerances for boundary dimensions and running accuracy of track rollers, yoke and stud type. Gives definitions and symbols.

TBC is added as an oxidation inhibitor to 1,3-butadiene for industrial use. For the determination the inhibitor is separated from the butadiene by evaporation. The residue is dissolved in water and an excess of iron(III) chloride is added. The spectrometric measurement of the absorbance of the yellow-coloured complex is carried out at a wavelength of about 425 nm. The method is applicable to…

All the iron(III) present in the test solution is reduced to iron(II) with ascorbic acid. At a pH between 2 and 9 1,10-phenanthroline is added. the measurement of the absorbance of the orange-red complex formed is carried out at the wavelength of maximum absorption (510 nm). The method is applicable to test solutions from which an aliquot portion can be taken containing between 10 and 500 g of Fe…

ISO 7271 specifies thickness tolerances and width tolerances for foils and thin strips, shipped in rolls, for general purposes. It is applicable firstly to double-rolled foil, with one side matt and the other bright, and of thicknesses in the range 6 m to 50 m inclusive and secondly to single-rolled foil and thin strip, with both sides the same, and of thicknesses in the range 21 m to 200 m.