---
title: "ASTM C865"
url: "https://mat-cs.com/astm-c865/"
description: "This practice covers the firing of specimens made from refractory concretes (castable refractories) in accordance with Practice C862 for cast specimens."
---

ASTM Standard

# ASTM C865

Standard Practice for Firing Refractory Concrete Specimens

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## Significance and Use

3.1 This practice is used to standardize the firing conditions of refractory concrete specimens prepared in accordance with Practice C862. The standards are set down to minimize laboratory-to-laboratory variation and do not at[tem](https://covalent.com/techniques/electron-microscopy/transmission-electron-microscopy-tem/)pt to duplicate any particular field applications.

## Scope

1.1 This practice covers the firing of specimens made from refractory concretes (castable refractories) in accordance with Practice C862 for cast specimens. The procedure is also recommended for heating rates to be used for high-temperature test methods such as Test Methods C16, C583, etc., when these methods are used to test refractory concretes.

1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.