This test method is used to measure the consistency (degree of self-flow) that a castable refractory demonstrates at a given level of tempering liquid at specified time intervals after the liquid is added. A self-flow of 25 % has been selected as the minimum at which a mix can be poured into typical molds or forms in normal practice.

Castable refractories which are self-flowing at one level of tempering liquid will require vibration for placement at some lower level of tempering liquid. At the tempering liquid levels which require vibration or tamping for placement, the castable refractory should be characterized using test methods which are appropriate for castable refractories designed for vibration placement, such as Test Method C1445.

This test method is not appropriate for determining the pumpability of castable refractories.

1. Scope

1.1 This test method covers the determination of the consistency (degree of self-flow) and working time of self-flowing castable refractories. This test may optionally be used to determine working time of self-flowing castables.

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.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C71 Terminology Relating to Refractories

C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement

C860 Test Method for Determining the Consistency of Refractory Castable Using the Ball-In-Hand Test

C862 Practice for Preparing Refractory Concrete Specimens by Casting

C1445 Test Method for Measuring Consistency of Castable Refractory Using a Flow Table

E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Keywords

castable; consistency; refractories; self-flowing; self leveling; working time; Consistency; Degree of self-flow; Refractories (castable); Ruggedness; Self-leveling; Working/setting time ;

ICS Code

ICS Number Code 81.080 (Refractories)

Citing ASTM Standards

[Back to Top]