ISO 5018:1983 PDF

Name: ISO 5018:1983 — Refractory materials — Determination of true density
SKU: ISO 5018:1983
Price: 25 EUR
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Refractory materials — Determination of true density

Название (английский):

ISO 5018:1983

Refractory materials — Determination of true density

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 1 октября 1983 г.
Издание:: ISO IS 5018 edition 1 version 1
ICS:: 81.080

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Описание (английский):

Establishes a method for measuring the true density of refractory products and raw materials. It is defined as the ratio of the mass of a quantity of dried material to its true volume and is calculated from the expression is the density of the liquid used at the temperature of the thermostatically controlled bath, and m1, m2, m3 are the masses determined in accordance with clause 7.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 5018:1983 specifies a pycnometric method for determining the true density of refractory products and raw materials. True density is defined as the ratio of the mass of a dried quantity of material to its true solid volume. The standard describes required apparatus, sample preparation, test procedure, and reporting essentials for accurate density measurement using a liquid of known density at a controlled temperature.

The method is widely used for material characterization, quality control and specification compliance in refractory manufacturing and research.

Key Topics

Scope: Measurement of true density for refractory products and raw materials, after crushing and grinding to remove closed pores where possible.

Apparatus: Typical equipment items listed include:

Pycnometer (25, 50 or 100 ml) with ground stopper and capillary bore
High-precision balance (accuracy ±0.1 mg)
Vacuum equipment capable of ≤25 mbar
Thermostatically controlled bath (maintained 2–5 °C above ambient, ±0.2 K)
Drying oven and desiccator
Test sieve (63 µm)

Preparation: Samples are dried to constant mass (110 ±5 °C recommended for many materials) and ground to pass the 63 µm sieve; care must be taken to avoid moisture uptake or contamination.

Procedure: The pycnometric technique requires determining three masses (commonly referred to as m1, m2 and m3) and using the known density of the test liquid (ρliq) at the bath temperature to calculate true density. An alternative procedure is provided for materials difficult to wet.

Temperature control: The method is sensitive to temperature; the liquid density must be referenced to the thermostatically controlled bath temperature (a water density table is provided in the standard).

Applications

Quality control: Verify consistency of refractory batches and raw materials by tracking true density as part of acceptance testing.

Material characterization: Support formulation, sintering studies and porosity assessment by providing reliable solid-phase density values.

Production and procurement: Use density data in specifications, supplier acceptance, and process monitoring to reduce variability in fired products.

Related Standards

ISO 5018 references or aligns with several other ISO documents and practices relevant to refractories and testing, including:

ISO 5022 - sampling and acceptance for shaped refractory products

ISO 565 - requirements for test sieves (woven wire cloth)

ISO/R 836 - vocabulary for the refractories industry

Reporting: The test report should identify the standard used (ISO 5018), material designation, test date and temperature, number of test pieces, grain size after grinding, vacuum pressure used, liquid and its density, heat treatment (if any), individual true density values and the mean result for clear traceability and quality decisions.

ISO 5018:1983 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

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