Indentation test for hard Gussasphalt (VSS2001/504)
Overview
Background & policy context:
Gussasphalts are nowadays tested by a method, used at the time indentations of about 3 to 6 mm were common. The precision of this method is not sufficient enough for today's highly stressed objects with indentations of less than 2 mm.
The test of dynamic indentation is exceptionally suited for optimizing mix designs and for defining targets often used in practice. Currently, there is missing a significant and reliable method for the continuous quality control.
A new method should be developed by evaluation different parameters, similar to the previous test with cylindrical samples.
Objectives:
The aim of that project is to develop an uncomplicated method for testing the static indentation. As an improvement comparing to the previous standardized method, there should be achieved a wider range of results concerning different kinds of hard Gussasphalt. In addition, the repeatability of the method should be enhanced.
Methodology:
The following procedure is planned :
- Systematic analysis of the previous measurement results at about 100 investigations
- Definition of Test Specimens:
The following criteria are considered:
- Ratio maximum grain / specimen dimensions
- Availability
- Handling (for example, dimensional stability of the formwork)
- Evaluation of the test parameters by systematic investigations
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