Marshall test of asphalt mixture can determine the stability and flow value of the specimen by compacting the mixed asphalt mixture. Then through the volume index (porosity, porosity of mineral aggregate), it is finally concluded whether the gradation and asphalt content of asphalt mixture are appropriate, and then the test section can be paved.
Extended data:
Marshall test, the full name of which is "Marshall stability and immersion Marshall test of asphalt mixture", is a test to determine the best asphalt-aggregate ratio of asphalt mixture. In order to design the mixture ratio of asphalt mixture or test the construction quality of asphalt pavement. Immersion Marshall stability test is used to test the spalling resistance of asphalt mixture when it is damaged by water. The feasibility of mixture design is verified by testing the water stability of mixture.
1. If the height of the standard Marshall specimen does not meet the requirements of 63.5 mm 1.3 mm or the height difference between the two sides is greater than 2mm, the specimen is invalid.
2. The time from taking out the sample from the thermostatic water tank to measuring the maximum load value should not exceed 30s.
3. When the difference between one measured value and the average value in a group of measured values is more than k times of the standard deviation, the measured value shall be discarded, and the average value of the other measured values shall be taken as the test result. When the number of samples n is 3, 4, 5 and 6, the values of k are 1. 15, 1.46, 1.67 and 1.82 respectively.
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