Specifies a method of determining the density of hardened concrete. Applies to lightweight, normal weight and heavy weight concrete in normal, saturated and oven dried conditions. Covers also sampling, apparatus, determination of mass and volume of the sample, calculation and expression of results, and test report.
Concrete, compacted fresh — Determination of density
Specifies a method of determining the density of compacted fresh concrete. Applies to lightweight, normal weight and heavy weight concrete. Covers also sampling, apparatus, procedure, expression of results and test report.
Aromatic hydrocarbons — Determination of sulphur content — Pitt-Ruprecht reduction and spectrophotom...
Relates to products boiling below 200 °C. Directly applicable to contents of 0.1 mg/kg to 30 mg/kg. Higher contents may be determined by a suitable dilution of the sample. Alkylsulphones, arylsulphonic acids and arylsulphonates give incomplete recovery of sulphur. Reduction of the sulphur compounds to nickel sulphide with Raney nickel. Stripping of the hydrogen sulphide in hydrochloric acid…
Applies to single start hobs of 1 to 40 module and 25 to 0,625 diametral pitch for helical and straight spur gears. It applies to solid and inserted blade hobs. Accuracy grades are AA, A, B and C where grade AA is the highest order of precision. Gives elemental tests for hobs and permitted tolerances for the practical test consisting of the measurement of the position of the cutting edges along a…
