The Performance Improvement of Hot Mix Asphalt and
Enhanced Applicability to Pavement Structure Thickness Design Using
DAMA (Drain Asphalt Modified Additive)
Jung-hoon, Jin* * University of Incheon ITS. R.C.
Researcher
3. Laboratory Test Methods and
Results
3.1 Marshall
Test The purpose of Marshall test (ASTM D 1559, KS F 2337) is to
measure the stability and flow of hot mixasphalt hardened at standard laboratory
strength. Marshall test is also used to decide on the content (percentage
composition) of asphalt binder as in Marshall mixture design method as well as
the quality management of asphalt mixtures. The test is performed by loading
the weight test at 50mm/min on a cylindrical specimen of 101.6mm( 4 inch)
diameter and 63.5mm height and by measuring the maximum load at the point of
destruction of the specimen and the compressed height through semi-circle
loading head. During the test, the temperature of the test specimen is
maintained at 60? ℃ to simulate the worst situation of the maximum temperature
on hot mix asphalt pavement during summer. Figure 1 depicts the Marshall testing
instrument, and table 7 shows the result of the test. Figures 2 and 3 show the
graph of Marshall stability and the flow value, respectively. Figures 4 and 5
exhibit the change with respect to the amount of DAMA mixed in the asphalt
mixture.
Figure 1 Marshall testing instrument
▒ Table 7 The
results of Marshall test
Figure 2 The graph of Marshall stability............... Figure 3 The graph of flow
value
Figure 4 Marshall
stability by the change with respect to the amount of DAMA mixed
Figure 5 Marshall flow
value by the change with respect to the amount of DAMA content
Figure 1 Marshall testing instrument
