ISO 23873:2025 PDF
Hard coal — Method for the measurement of the swelling properties using a dilatometer
Hard coal — Method for the measurement of the swelling properties using a dilatometer
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 14
- Дата публикации:
- 19 сентября 2025 г.
- Издание:
- ISO IS 23873 edition 2 version 1
- ICS:
- 73.040
This document describes a method for the measurement of the swelling properties of hard coal using a dilatometer.
Abstract
Overview
ISO 23873:2025 - Hard coal - Method for the measurement of the swelling properties using a dilatometer specifies a standardized laboratory procedure to measure the swelling (dilatation and contraction) behaviour of hard coal when heated. The method records piston movement on a compacted pencil of powdered coal in a steel retort heated at a controlled rate, producing a characteristic dilatation curve used to quantify properties such as . This second edition (2025) unifies earlier Ruhr and Audibert-Arnu procedures into a single acceptable method.
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