ASTM D5801 Test Fixture

Description

ASTM D5801- Standard Test Method for Toughness and Tenacity of Asphalt Materials

 

ASTM D5801 describes the procedure for measuring the toughness and tenacity of asphalt materials.

Typically, the test method has been used to characterize elastomer modified asphalts, although values for toughness and tenacity may be obtained for any type of

polymer-modified or non-modified asphalt.

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ASTM D5801 / Significance and Use

This test method is useful in confirming that an asphalt cement has been modified with a material that provides a significant elastomeric component.

Elastomer-modified asphalts can be characterized by their ability to be stretched to a large elongation while at the same time resisting further stretching.

Toughness and tenacity are two parameters for measuring this ability.

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ASTM D5801 / Apparatus

Sample Container —A metal, cylindrical, flat-bottom container with a nominal inside diameter of 21⁄8 in. (54.0 mm) and a nominal depth of 13⁄8 in. (34.9 mm)

shall be used to hold the sample.

Containers known as tin boxes or seamless ointment boxes with a 3-oz capacity meet these requirements.

Tension Head—The tension head shall consist of a polished metal, hemispherical head with a 7⁄16 in. (11.1 mm) radius, which is integrally connected to a 1⁄4 in.

(6.4 mm) diameter stem approximately 15⁄16 in. (33.3 mm) long.

The stem shall be threaded and fitted with a knurled lowering screw to allow for accurate adjustment of the tension head height in the sample container.

The stem of the tension head shall be fitted with a small pin to prevent twisting of the head while adjusting the height.

**** NOTE —Brass and stainless steel are acceptable metals for constructing tension heads.

Aluminum scratches easily and steel rusts, so these metals should not be used.

*** Before conducting ASTM D5801 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.

 

***PARSROS  offers several types of grips and fixtures which will enable you to perform a variety of tests

  that are accurate and repeatable.