ASTM C1720-11e1
Standard Test Method for Determining Liquidus Temperature of Immobilized Waste Glasses and Simulated Waste Glasses

Standard No.

ASTM C1720-11e1

Release Date

2011

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C1720-17

Latest

ASTM C1720-21

Scope

5.1 This procedure can be used for (but is limited to) the following applications:

(1) support glass formulation development to make sure that processing criteria are met,

(2) support production (for example, processing or troubleshooting), and

(3) support model validation.

1.1 These practices cover procedures for determining the liquidus temperature (T_L) of nuclear waste, mixed nuclear waste, simulated nuclear waste, or hazardous waste glass in the temperature range from 600°C to 1600°C. This method differs from Practice C829 in that it employs additional methods to determine T_L. T_L is useful in waste glass plant operation, glass formulation, and melter design to determine the minimum temperature that must be maintained in a waste glass melt to make sure that crystallization does not occur or is below a particular constraint, for example, 1 volume % crystallinity or T_1%. As of now, many institutions studying waste and simulated waste vitrification are not in agreement regarding this constraint (1).

1.2 Three methods are included, differing in (1) the type of equipment available to the analyst (that is, type of furnace and characterization equipment), (2) the quantity of glass available to the analyst, (3) the precision and accuracy desired for the measurement, and (4) candidate glass properties. The glass properties, for example, glass volatility and estimated T_L, will dictate the required method for making the most precise measurement. The three different approaches to measuring T_L described here include the following: (A) Gradient Temperature Furnace Method (GT), (B) Uniform Temperature Furnace Method (UT), and (C) Crystal Fraction Extrapolation Method (CF). This procedure is intended to provide specific work processes, but may be supplemented by test instructions as deemed approp......

ASTM C1720-11e1 Referenced Document

• ASTM C162 Standard Terminology of Glass and Glass Products
• ASTM C829 Standard Practices for Measurement of Liquidus Temperature of Glass by the Gradient Furnace Method
• ASTM D1129 Standard Terminology Relating to Water
• ASTM D1193 Standard Specification for Reagent Water
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E2282 Standard Guide for Defining the Test Result of a Test Method
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM C1720-11e1 history

• 2021 ASTM C1720-21 Standard Test Methods for Determining Liquidus Temperature of Waste Glasses and Simulated Waste Glasses
• 2017 ASTM C1720-17e1 Standard Test Method for Determining Liquidus Temperature of Waste Glasses and Simulated Waste Glasses
• 2017 ASTM C1720-17 Standard Test Method for Determining Liquidus Temperature of Waste Glasses and Simulated Waste Glasses
• 2011 ASTM C1720-11e1 Standard Test Method for Determining Liquidus Temperature of Immobilized Waste Glasses and Simulated Waste Glasses
• 2011 ASTM C1720-11 Standard Test Method for Determining Liquidus Temperature of Immobilized Waste Glasses and Simulated Waste Glasses