5018 International Standard (ISO INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAH OPrAHW3ALMH NO CTAHAAPTW3ALMWGORGANISATION INTERNATIONALE DE NORMALISATION ANsI Internat Doc Sect Refractory materials - Determination of true density Produits refractaires -- Détermination de la masse volumique absolue First edition - 1983-10-15 UDC 666.76 : 531.755.1 Ref. No. 1SO 5018-1983 (E) ISO 5018-1983 (E) Descriptors : refractory materials, density measurement, test equipment, sampling. Price based on 4 pages Copyright International Organization for Standardization ted without license from IHS Not for Resale Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of developing International interested in a subject for which a technical committee has been authorized has the and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approvai before their acceptance as International Standards by theiso Council. Refractories, and was circulated to the member bodies in May 1982. It has been approved by the member bodies of the following countries : Portugal Australia Germany, F. R. Austria Hungary Romania Brazil India South Africa, Rep. of Canada Italy Spain Korea, Rep. of China Sweden Czechoslovakia Mexico United Kingdom Egypt, Arab Rep. of Netherlands USA France Poland USSR No member body expressed disapproval of the document. @ International Organization for Standardization, 1983 Printed in Switzerland Copyright International Organization for Standardization Not for Resale INTERNATIONAL STANDARD ISO 5018-1983 (E) Refractory materials - Determination of true density Scope and field of application 5 Apparatus This International Standard establishes a method for measuring 5.1 Pycnometer, of capacity from 25, 50 or 100 ml, fitted the true density of refractory products and raw materials. with a ground stopper having a capillary bore. References 2 5.2 Balance, with an accuracy of ± 0,1 mg. ISO565,Testsieves---Wovenmetalwireclothandperforated 5.3 Vacuum equipment, capable of reducing the pressure plate - Nominal sizes of apertures. to a value not greater than 25 mbar1), with a means of measur- ISO/R 836, Vocabulary for the refractories industry. ing the pressure. Iso 5022, Shaped refractory products - Samplingandaccep 5.4 Thermostatically controlled bath, capable of being tance. maintained at a temperature from 2 to 5 °C above the ambient temperature with an accuracy2) of ± 0,2 K. 3 Definitions 5.5 Test sieve, 63 μm aperture complying with the re- For the purpose of this International Standard, the following quirements of ISO 565. definitions apply. 5.6 Drying oven. 3.1 true density : The ratio of the mass of a quantity of dried material to its true volume. 5.7 Desiccator. 3.2 true volume : The volume of the solid material in a porous body. 6 Test material 4 Principle 6.1 The samples to be measured shall be selected in accor. dance with ISo 50223) or another standard sampling plan 4.1 The true density is delerinined by measuring the dry mass agreed by the interested parties. and the true volume of a sample of the material after it has been crushed and ground to such a particle size that as far as poss- 6.2 In the case of a shaped refractory product, the number of iblenoclosedporesremain.Thevolumeofthegroundmaterial test pieces to be tested for each item shall be agreed between is determined using a pycnometer and a liquid .of known den- the interested parties and shall be stated in the test report. To sity, the temperature of the liquid being controlled or carefully facilitate statistical evaluation when several bricks are tested, measured. the same number of test pieces shall be taken from each brick. 4.2 Unfired refractory products and basic products may re- 6.3 The test material (test piece) shall be crushed and groun