PHASE II REPORT - Caltrans

1 hr soak
Dry Loss %
Figure 4.32: Comparison of Different Systems Using CAT
The test appears to distinguish between system types at 77°F (25°C) and 70% humidity.
The existing wet track abrasion test, TB-100 was measured for all systems and compared to the
CAT test which is noted in Table 4.10.
System
30
25
20
15
10
* 77°F (25°C) 70% humidity
5
0
Comparison of systems
30 60 180 300
Time of Cure (Min) 77°F (25°C) 70% Humidity
Table 4.10: TB-100 Test Results
Loss WTAT
/1 Hour Soak
(g/cm 2 )
69
Loss 5 hr cure*dry
1 hour soak
(g/cm 2 )
M2 0.8 0.5
M4 1.02 0.9
M1 0.8 0.4
M3 1.1 0.4
Mix M1
Mix M2
Mix M3
Mix M4
The data indicates that the abrasion loss is similar for the wheels in the CAT tests compared to
WTAT for the comparable level of cure and soaking, since both show low losses based on