I. Overview
The instrument applies to the vacuum method to determine the theoretical maximum relative density of asphalt mixture, asphalt mixture for the design, road survey or pavement quality management calculation of voidage, compaction and so on.
This instrument is not suitable for water absorption greater than 3%Of a porous aggregate asphalt mixture.
Second, the test method
Test code for asphalt and bituminous mixtures by highway engineering T0711-1993get on.

Third, the main technical parameters

voltage: 220V ± 10V

Vacuum density: -0.1MPa

Oscillation gap: 3 min

Work: Automatic /Manual

Container volume: 5000 ml * 2only

Vacuum pressure: automatic control