ASTM D7496-18 PDF

Full title and description

ASTM D7496-18 — Standard Test Method for Viscosity of Emulsified Asphalt by Saybolt Furol Viscometer. This method describes use of a Saybolt Furol viscometer to measure the consistency (viscosity) of emulsified asphalts and is intended for materials covered by Specifications D977 and D2397/D2397M.

Abstract

This short test method specifies apparatus, sample conditioning, and procedure for determining Saybolt Furol viscosity of emulsified asphalt at specified temperatures (commonly 25 °C or 50 °C). The measured viscosity helps control application and spray/spray‑distribution performance of emulsions; strict adherence to procedure is required because many emulsions are shear‑sensitive.

General information

• Status: Active (current edition D7496-18); under routine review/revision work item WK88088.
• Publication date: Designation year 2018 (current edition approved Dec 1, 2018; published January 2019).
• Publisher: ASTM International (formerly American Society for Testing and Materials).
• ICS / categories: 17.060 (Measurement of volume, mass, density, viscosity); 91.100.50 (Binders, sealing materials); 93.080.20 (Road construction materials).
• Edition / version: D7496-18 (current edition, DOI referenced as D7496-18).
• Number of pages: 3 pages (concise procedure standard).

Scope

The standard applies to measurement of viscosity (Saybolt Furol units) for emulsified asphalts covered by Specifications D977 and D2397/D2397M. It defines required viscometer type (Saybolt Furol conforming to Test Method D88), sample preparation and conditioning (stirring, temperature control for tests at 25 °C or 50 °C), and notes precision considerations because many emulsions are shear‑sensitive. The method is brief and intended for quality control and acceptance testing.

Key topics and requirements

• Use of a Saybolt Furol viscometer meeting D88 requirements.
• Sample conditioning: thorough stirring to homogeneity and specified temperature conditioning (typical conditions include 25 °C ±3 °C or 50 °C ±3 °C depending on test requirement).
• Specified measurement units and reporting (Saybolt Furol seconds; SI and inch‑pound units addressed separately).
• Applicability to emulsions covered by ASTM D977 and D2397/D2397M.
• Precision and bias established via interlaboratory studies (research reports supporting method performance).

Typical use and users

This method is used by materials and pavement laboratories, asphalt emulsion manufacturers, highway agencies, contractors and quality‑control personnel to verify emulsion consistency for spray application, mixing, and quality acceptance. It is typically part of routine QC/QA testing where Saybolt Furol viscosity is specified by contract or product specifications.

Related standards

Commonly referenced and related ASTM standards include: D88 (Saybolt viscosity methods and apparatus), D977 (Specification for Emulsified Asphalt), D2397/D2397M (Specification for Cationic Emulsified Asphalt), and referenced instrument/measurement standards such as E1 (liquid‑in‑glass thermometers), E11 (test sieve cloth), and E1137/E1137M (industrial platinum resistance thermometers).

Keywords

emulsified asphalt, asphalt emulsion, Saybolt Furol, viscosity, viscosity test, D7496, Saybolt, Furol, QC, pavement materials.

FAQ

Q: What is this standard?

A: ASTM D7496-18 is a short test method that specifies how to measure the Saybolt Furol viscosity of emulsified asphalt using a Saybolt Furol viscometer; it is intended for emulsions referenced in D977 and D2397/D2397M.

Q: What does it cover?

A: It covers apparatus requirements, sample conditioning (mixing and temperature control), test procedure for measuring Saybolt Furol viscosity, and reporting; it notes that many emulsions are shear‑sensitive and that strict procedural adherence is required.

Q: Who typically uses it?

A: Asphalt emulsion manufacturers, pavement and materials testing laboratories, highway authorities, contractors and QC/QA personnel who need a repeatable viscosity measurement for acceptance, specification compliance, or process control.

Q: Is it current or superseded?

A: The designation D7496-18 is the current edition (approved Dec 1, 2018; published Jan 2019). The method remains in active use; a revision work item (WK88088) has been opened for routine review. Users should check ASTM publication lists for any amendments or newer editions before relying on the method for contractual requirements.

Q: Is it part of a series?

A: It is part of the ASTM D7496 family of Saybolt Furol viscosity methods (previous editions: D7496-11, D7496-17) and is linked to other asphalt/emulsion specifications and test methods (D977, D2397/D2397M, D88).

Q: What are the key keywords?

A: Emulsified asphalt, Saybolt Furol, viscosity, D7496, viscosity testing, emulsion QC.