Measurement of Viscosity of Asphalt Binders by Rotating Viscometer Method (CAT#: STEM-PPA-0020-YJL)

Introduction

Asphalt binder is a commonly used material in the paving industry. However, with the increased development of cities and countries worldwide, asphalt pavement is becoming more prone to cracking, rutting, moisture damage, and other degradation phenomena under dynamic loads and in extreme weather conditions. These issues can reduce the quality and safety of roads, leading to the need for additional maintenance and reconstruction. As a byproduct of refineries, asphalt is a complex material with unique viscoelasticity due to its high content of asphaltenes and resins. This viscoelasticity makes it an ideal mixture with aggregates for use in different load-bearing situations. It is important to note that the viscoelasticity of asphalt is only effective within a certain temperature range.

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Principle Applications Procedure Materials Notes Related Products

Principle

The principle of the rotating viscometer method to measure the force acting on a rotor (torque) when it rotates at a constant angular velocity (rotational speed) in a liquid. Rotating viscometers are used for measuring the viscosity of Newtonian (shear-independent viscosity) or non-Newtonian liquids (shear dependent viscosity or apparent viscosity). Rotating viscometers can be divided in 2 groups, namely absolute and relative viscometers. In absolute viscometers the flow in the measuring geometry is well defined.
The measurements result in absolute viscosity values, which can be compared with any other absolute values. In relative viscometers the flow in the measuring geometry is not defined. The measurements result in relative viscosity values, which cannot be compared with absolute values or other relative values if not determined by the same relative viscometer method. Different measuring systems are available for given viscosity ranges as well as several rotational speeds.

Applications

Mineral oil industry; Food industry; Cosmetic/pharmaceutical industry; Petroleum industry; Chemical industry

Procedure

1. Pour the liquid into the measuring cup.
2. Insert the spindle into the liquid.
3. Rotate the spindle and measure the resistance.

Materials

• Sample Type: liquid, gel-like, or semi-solid everyday substances

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