Marshall attempt
The Marshall test is a test method in accordance with DIN 1996-11 and is used to investigate or determine the Marshall stability and the Marshall flow value of rolled asphalt ; it was developed by Bruce Marshall in 1939. For this purpose, the Marshall specimen is heated to 60 ° C in a water bath and then placed in the Marshall press. The two pressure shells deform the test specimen at a feed rate of 50 mm / min until the structure is destroyed.
In the course of the test, the force applied and the resulting deformation are recorded. The maximum value of the force curve is called the Marshall stability, the deformation value associated with this force is called the Marshall flow value. The stiffness results from the relationship between stability and flow value. The test results are not used to assess the stability of rolled asphalt, but to determine the favorable bitumen content .
literature
- S. Velske, H. Mentlein: Road construction technology . Werner Verlag, Düsseldorf 2002, ISBN 3-8041-3875-6 , p. 106 .
Individual evidence
- ↑ Patrick Lavin: Asphalt Pavements: Spon Press, 2003, ISBN 0-415-24733-0 , p. 142.