ASTM D6934-22 PDF

Full title and description

Standard Test Method for Residue by Evaporation of Emulsified Asphalt — ASTM D6934-22. This test method describes a laboratory procedure to determine the percentage of asphalt residue remaining after controlled evaporation of water and volatile components from emulsified asphalts (asphaltic base + water + emulsifying agent).

Abstract

ASTM D6934-22 provides a short, quantitative evaporation procedure (heating an open beaker of the emulsion in an oven) to determine residue content of emulsified asphalt. The standard includes sample conditioning requirements, two procedural options, calculation and reporting rules, and guidance on when evaporation residue results should be confirmed by distillation methods. The method notes that evaporation residue can differ from distillation residue and gives directions for interpretation.

General information

• Status: Active / Current standard (revision issued 2022).
• Publication date: July 1, 2022 (designated D6934-22).
• Publisher: ASTM International.
• ICS / categories: 93.080.20 — Road construction materials; Road and paving materials / vehicle‑pavement systems.
• Edition / version: D6934-22 (2022 revision of D6934 series).
• Number of pages: 2 (concise test method format typical of ASTM test methods).

General publication and bibliographic details above are based on the D6934-22 document record and supplier listings.

Scope

This test method covers the quantitative determination of residue in emulsified asphalts composed principally of a semisolid or liquid asphaltic base, water, and an emulsifying agent. The basic procedure heats a measured sample in an open beaker in an oven at about 163 ± 3 °C until water and volatiles have evaporated, then reports percent residue. The scope also notes limitations: evaporation residue may differ from distillation residue (see D6997) and, if necessary, residue should be re‑determined by distillation when acceptance criteria reference distillation results.

Key topics and requirements

• Sample conditioning and homogeneity (thorough stirring before testing).
• Apparatus essentials: open‑top beaker(s), oven capable of maintaining 163 ± 3 °C, analytical balance, and any traps or guards to prevent loss of asphalt during evaporation.
• Two procedural options (Procedure A and Procedure B) designed to control loss of asphalt while ensuring complete evaporation of water/volatiles.
• Calculation and reporting of percent residue and repeatability/acceptance guidance (procedural checks such as rerunning when measured values differ beyond specified limits).
• Relationship to distillation methods: notes and instructions for when evaporation results should be confirmed by distillation (e.g., to compare with D6997 results).

Typical use and users

Used by construction materials laboratories, state Departments of Transportation (DOTs), paving contractors, QC/QA teams, and research groups for material acceptance, specification compliance, and product characterization of emulsified asphalts. The method is suitable where a simple, rapid measure of residue content is required and as a screening or acceptance test in production and field laboratories.

Related standards

Commonly referenced companion standards include ASTM D6997 (Distillation Test Method for Residue of Emulsified Asphalt) for distillation comparison, and other ASTM D04 committee procedures and specifications (for agency competence and test lab practices, e.g., D3666). The D6934 series replaces earlier versions of the same designation (for example the 2008 / reapproved 2016 text) with the 2022 revision.

Keywords

asphalt, emulsified asphalt, residue, evaporation, evaporation residue, asphalt emulsion, cationic emulsion, D6934-22, residue by evaporation.

FAQ

Q: What is this standard?

A: ASTM D6934-22 is a standardized test method that specifies how to determine the percentage of residue remaining after evaporating water and volatiles from emulsified asphalt samples.

Q: What does it cover?

A: It covers sample conditioning, required apparatus, two procedural options for evaporation, the heating condition (oven at ~163 ± 3 °C), calculation and reporting of residue, and guidance on interpretation compared to distillation tests.

Q: Who typically uses it?

A: Materials testing laboratories, DOT and municipal materials groups, paving contractors, manufacturers of emulsified asphalts, and researchers performing QC/QA or product characterization.

Q: Is it current or superseded?

A: The D6934-22 revision (published July 1, 2022) is the current ASTM edition of this test method; it supersedes earlier editions of D6934. Users should verify any later revisions after 2022 for updates.

Q: Is it part of a series?

A: Yes — D6934 is part of ASTM Committee D04 (Road and Paving Materials) test methods for asphalt and pavement materials; it is related to other D04 methods such as D6997 (distillation) and relevant specifications and practices maintained by subcommittees (e.g., D04.42).

Q: What are the key keywords?

A: Asphalt, emulsified asphalt, residue, evaporation, evaporation residue, asphalt emulsion, D6934-22.